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<front>
<journal-meta>
<journal-id journal-id-type="index">7858</journal-id>
<journal-title-group>
<journal-title specific-use="original" xml:lang="es">La Calera</journal-title>
<abbrev-journal-title abbrev-type="publisher" xml:lang="es">La Calera</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">1998-8850</issn>
<issn-l>1998-7846</issn-l>
<publisher>
<publisher-name>Universidad Nacional Agraria</publisher-name>
<publisher-loc>
<country>Nicaragua</country>
<email>donald.juarez@ci.una.edu.ni</email>
</publisher-loc>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="art-access-id" specific-use="redalyc">785882496008</article-id>
<article-id pub-id-type="doi">10.5377/calera.v25i45.21924</article-id>
<article-categories>
<subj-group subj-group-type="heading">
<subject>Ciencia de las plantas</subject>
</subj-group>
</article-categories>
<title-group>
<article-title xml:lang="es">Control biológico de Radopholus similis (Cobb) Thorne mediante el uso de bacterias y hongos endófitos en Musa paradisiaca L.</article-title>
<trans-title-group>
<trans-title xml:lang="en">Biological Control of <italic>Radopholus similis</italic> (Cobb) Thorne Using Endophytic Bacteria and Fungi in Musa<italic> paradisiaca</italic> L.</trans-title>
</trans-title-group>
</title-group>
<contrib-group>
<contrib contrib-type="author" corresp="no">
<contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6826-1897</contrib-id>
<name name-style="western">
<surname>Rodriguez-Zamora</surname>
<given-names>Markelyn</given-names>
</name>
<xref ref-type="aff" rid="aff1"/>
<xref ref-type="fn" rid="fn1">1</xref>
<email>markelyn.rodriguez@ci.una.edu.ni</email>
</contrib>
<contrib contrib-type="author" corresp="no">
<contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6135-7271</contrib-id>
<name name-style="western">
<surname>Morán Centeno</surname>
<given-names>Juan Carlos</given-names>
</name>
<xref ref-type="aff" rid="aff2"/>
<xref ref-type="fn" rid="fn2">2</xref>
<email>juan.moran@ci.una.edu.ni</email>
</contrib>
<contrib contrib-type="author" corresp="no">
<contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7904-8853</contrib-id>
<name name-style="western">
<surname>Blandón-Díaz</surname>
<given-names>Jorge Ulises</given-names>
</name>
<xref ref-type="aff" rid="aff3"/>
<xref ref-type="fn" rid="fn3">3</xref>
<email>ulisesdb@ci.una.edu.ni</email>
</contrib>
<contrib contrib-type="author" corresp="no">
<contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3311-6646</contrib-id>
<name name-style="western">
<surname>Martinuz</surname>
<given-names>Alfonso</given-names>
</name>
<xref ref-type="aff" rid="aff4"/>
<xref ref-type="fn" rid="fn4">4</xref>
<email>alfonsomartinuz@gmail.com</email>
</contrib>
</contrib-group>
<aff id="aff1">
<institution content-type="original">Universidad Nacional Agraria, Nicaragua</institution>
<country country="NI">Nicaragua</country>
<institution-wrap>
<institution content-type="orgname">Universidad Nacional Agraria</institution>
<institution-id institution-id-type="ror">https://ror.org/02gne5439</institution-id>
</institution-wrap>
</aff>
<aff id="aff2">
<institution content-type="original">Universidad Nacional Agraria, Nicaragua</institution>
<country country="NI">Nicaragua</country>
<institution-wrap>
<institution content-type="orgname">Universidad Nacional Agraria</institution>
<institution-id institution-id-type="ror">https://ror.org/02gne5439</institution-id>
</institution-wrap>
</aff>
<aff id="aff3">
<institution content-type="original">Universidad Nacional Agraria, Nicaragua</institution>
<country country="NI">Nicaragua</country>
<institution-wrap>
<institution content-type="orgname">Universidad Nacional Agraria</institution>
<institution-id institution-id-type="ror">https://ror.org/02gne5439</institution-id>
</institution-wrap>
</aff>
<aff id="aff4">
<institution content-type="original">Investigador independiente</institution>
<country country="NI">Nicaragua</country>
<institution-wrap>
<institution content-type="orgname">Investigador independiente</institution>
<institution-id institution-id-type="ror">https://ror.org/02gne5439</institution-id>
</institution-wrap>
</aff>
<author-notes>
<fn id="fn1" fn-type="other">
<label>1</label>
<p>MSc. Sanidad Vegetal, Dirección de Ciencias Agrícolas, Universidad Nacional Agraria</p>
</fn>
<fn id="fn2" fn-type="other">
<label>2</label>
<p>MSc. Agroecología y Desarrollo Sostenible, Dirección de Ciencias Agrícolas, Universidad Nacional Agraria</p>
</fn>
<fn id="fn3" fn-type="other">
<label>3</label>
<p>PhD. Fitopatología, Dirección de Ciencias Agrícolas, Universidad Nacional Agraria</p>
</fn>
<fn id="fn4" fn-type="other">
<label>4</label>
<p>PhD. Agricultural Sciences Enfaces Nematology and Plant Protection</p>
</fn>
</author-notes>
<pub-date pub-type="epub-ppub">
<season>July-December</season>
<year>2025</year>
</pub-date>
<volume>25</volume>
<issue>45</issue>
<fpage>144</fpage>
<lpage>151</lpage>
<history>
<date date-type="received" publication-format="dd mes yyyy">
<day>16</day>
<month>09</month>
<year>2025</year>
</date>
<date date-type="accepted" publication-format="dd mes yyyy">
<day>12</day>
<month>12</month>
<year>2025</year>
</date>
</history>
<permissions>
<copyright-statement>Los artículos de la revista La Calera de la Universidad Nacional Agraria, Nicaragua, se comparten bajo términos de Licencia Creative Commons Atribución-NoComercial-CompartirIgual 4.0 Internacional. © copyright 2025. Universidad Nacional Agraria (UNA)</copyright-statement>
<copyright-year>2025</copyright-year>
<copyright-holder>Universidad Nacional Agraria</copyright-holder>
<ali:free_to_read/>
<license xlink:href="https://creativecommons.org/licenses/by-nc-sa/4.0/">
<ali:license_ref>https://creativecommons.org/licenses/by-nc-sa/4.0/</ali:license_ref>
<license-p>Esta obra está bajo una Licencia Creative Commons Atribución-NoComercial-CompartirIgual 4.0 Internacional.</license-p>
</license>
</permissions>
<abstract xml:lang="es">
<title>Resumen</title>
<p>El plátano (<italic>Musa</italic> spp), es un cultivo de importancia económica en Nicaragua por su consumo interno como para su exportación. El presente estudio evaluó el efecto de la combinación de cepas endofíticas de <italic>Bacillus subtilis</italic> (B1 y B2), <italic>Bacillus cereus</italic>, <italic>Pseudomonas</italic> sp. y <italic>Saccharomyces</italic> sp, asiladas de raíces de plátano, como una alternativa biológica para el manejo de <italic>Radopholus similis</italic>, para ello se efectuó un diseño completo al azar, mediante inoculaciones simples, combinadas de bacterias y hongos en vitroplantas del cultivar CEMSA ¾. Se cuantifico el porcentaje de penetración del nematodo y porcentaje de control, se empleó una transformación arcoseno, para homogenizar varianza y se aplicó análisis de varianza y separaciones de media por Tukey (0.05). Las inoculaciones simples de <italic>Saccharomyces</italic> sp, y el testigo reflejaron una mayor tasa de penetración del nematodo. En cuanto al porcentaje de control lo presentaron las inoculaciones combinadas <italic>Bacillus cereus</italic> + <italic>Pseudomonas</italic> sp + <italic>Saccharomyces</italic> sp + <italic>Bacillus subtilis</italic> (B1), <italic>Bacillus subtilis</italic> (B2) + <italic>Pseudomonas</italic> sp + <italic>Saccharomyces</italic> sp, así como <italic>Bacillus subtilis</italic> (B2) + <italic>Pseudomonas</italic> sp + <italic>Saccharomyces</italic> sp., al igual que <italic>Bacillus subtilis</italic> (B2) y <italic>Saccharomyces</italic> sp +<italic>Bacillus subtilis</italic> (B1) redujeron las poblaciones de nematodos hasta en un 83 %; las inoculaciones con <italic>Bacillus cereus</italic> + <italic>Pseudomonas</italic> sp +<italic> Saccharomyces</italic> sp + <italic>Bacillus subtilis</italic> (B2), <italic>Bacillus cereus</italic> + <italic>Pseudomonas</italic> sp + <italic>Saccharomyces</italic> sp + <italic>Bacillus subtilis</italic> (B1) presentaron la mayor altura. Las inoculaciones combinadas mejoran la eficiencia en el control de <italic>Radopholus similis </italic>siendo una alternativa sostenible y amigable con el ambiente.</p>
</abstract>
<trans-abstract xml:lang="en">
<title>Abstract</title>
<p>Plantain (<italic>Musa</italic> spp.) is a crop of major economic importance in Nicaragua, both for domestic consumption and for export. The present study evaluated the effect of combining endophytic strains of <italic>Bacillus subtilis</italic> (B1 and B2), <italic>Bacillus cereus</italic>, <italic>Pseudomonas</italic> sp., and <italic>Saccharomyces</italic> sp., isolated from plantain roots, as a biological alternative for the management of <italic>Radopholus similis</italic>. A completely randomized design was employed, using single and combined inoculations of bacteria and fungi in vitroplants of the cultivar CEMSA ¾. The percentage of nematode penetration and the percentage of control were quantified. An arcsine transformation was applied to homogenize variances, followed by analysis of variance and mean separation using Tukey’s test (0.05). Single inoculations of <italic>Saccharomyces</italic> sp. and the control treatment showed the highest nematode penetration rates. Regarding to the control percentage, the highest values were obtained with the combined inoculations composed by <italic>Bacillus cereus</italic> + <italic>Pseudomonas</italic> sp. + <italic>Saccharomyces</italic> sp. + <italic>Bacillus subtilis</italic> (B1), <italic>Bacillus subtilis</italic> (B2) + <italic>Pseudomonas</italic> sp. + <italic>Saccharomyces</italic> sp., as well as <italic>Bacillus subtilis</italic> (B2) + <italic>Pseudomonas</italic> sp. + <italic>Saccharomyces</italic> sp. Similarly, <italic>Bacillus subtilis</italic> (B2) alone and the combination of <italic>Saccharomyces</italic> sp. + <italic>Bacillus subtilis</italic> (B1), reduced nematode populations by up to 83%. The inoculations of <italic>Bacillus cereus</italic> + <italic>Pseudomonas</italic> sp. + <italic>Saccharomyces</italic> sp. + <italic>Bacillus subtilis</italic> (B2) and <italic>Bacillus cereus</italic> + <italic>Pseudomonas</italic> sp. + <italic>Saccharomyces</italic> sp. + <italic>Bacillus subtilis</italic> (B1) resulted in the greatest plant height. Combined inoculations improved the efficiency of <italic>Radopholus similis</italic> control, representing a sustainable and environmentally friendly alternative.</p>
</trans-abstract>
<kwd-group xml:lang="es">
<title>Palabras clave</title>
<kwd>Endofiticos</kwd>
<kwd>biomasa</kwd>
<kwd>biocontrol</kwd>
<kwd>promotores de crecimiento</kwd>
<kwd>vitroplantas. <bold/>
</kwd>
</kwd-group>
<kwd-group xml:lang="en">
<title>Keywords</title>
<kwd>Endophytic microorganisms</kwd>
<kwd>biomass</kwd>
<kwd>biocontrol</kwd>
<kwd>growth promoters</kwd>
<kwd>vitroplants</kwd>
</kwd-group>
<counts>
<fig-count count="2"/>
<table-count count="5"/>
<equation-count count="0"/>
<ref-count count="41"/>
</counts>
<custom-meta-group>
<custom-meta>
<meta-name>redalyc-journal-id</meta-name>
<meta-value>7858</meta-value>
</custom-meta>
</custom-meta-group>
</article-meta>
</front>
<body>
<sec sec-type="intro">
<title/>
<p>El cultivo de plátano (<italic>Musa paradisiaca</italic> L.), en Nicaragua constituye un componente esencial en la dieta de la población nicaragüense, desempeñando un papel clave en la generación de empleos directos e indirectos en los departamentos de Rivas y Chinandega, donde se concentra la mayor producción. En términos económicos, en el año 2022, el cultivo de plátano aportó 18.2 millones de dólares a la economía nacional, experimentando un crecimiento del 21.8 % en valor y del 6.6 % en volumen, en comparación con el año anterior (<xref ref-type="bibr" rid="redalyc_785882496008_ref95">Ministerio Agropecuario [MAG], 2025, párr. 1</xref>).</p>
<p>Una de las limitantes en la producción de plátano es las afectaciones causadas por el nematodo <italic>Radopholus</italic>
<italic> similis</italic>, endoparásito migratorio que afecta el sistema radicular mediante su estilete (estructura que usa para alimentarse), provocando el volcamiento de la planta; cuando esta se encuentra en estados de floración reduce severamente el peso del racimo y la vida útil de la plantación <xref ref-type="bibr" rid="redalyc_785882496008_ref77">(Araya y Vargas, 2018</xref>; <xref ref-type="bibr" rid="redalyc_785882496008_ref78">Bechem <italic>et al</italic>., 2018</xref>); así mismo afecta directamente a través de sus complejas interacciones con otros patógenos que perturban directamente al cultivo al realizar lesiones en las raíces; dañando la morfología de la raíz (<xref ref-type="bibr" rid="redalyc_785882496008_ref107">Roth <italic>et al</italic>., 2019</xref>, <xref ref-type="bibr" rid="redalyc_785882496008_ref100">Parrado y Quintanilla, 2024</xref>). Uno de los factores en el comportamiento de los nematodos es el tipo de alimentación, sus secreciones dependen del tipo de célula, que definen los cambios fisiológicos en la planta (<xref ref-type="bibr" rid="redalyc_785882496008_ref88">Kumar y Yadav, 2020</xref>).</p>
<p>Para el manejo de las afectaciones por nematodos, se han implementado diversas alternativas de control, siendo el uso de nematicidas fumigantes y no fumigantes, una estrategia eficaz, pero que plantea riesgos en el ambientales y la salud humana. <italic>Radopholus similis</italic> sigue siendo una amenaza en los sistemas de producción de plátano (<xref ref-type="bibr" rid="redalyc_785882496008_ref97">Mostafa <italic>et al</italic>., 2019</xref>). Como alternativa para minimizar la carga química de los sistemas agrícolas donde se cultiva plátano, el uso de hongos y bacterias endofíticas ofrece una estrategia sostenible económicamente viable para el control de <italic>Radopholus similis</italic>.</p>
<p>Los microorganismos endófitos son organismos simbióticos que colonizan los tejidos vegetales que inducen a resistencia sistémica en su huésped y promueven la absorción de nutrientes; esto los convierte en alternativas sostenibles al minimizar el uso de nematicidas fumigantes y no fumigantes (<xref ref-type="bibr" rid="redalyc_785882496008_ref89">Kumar y Dara, 2021</xref>). Estudios refieren que los endófitos producen metabolitos secundarios como flavonoides, péptidos, quinonas, alcaloides, esteroides, fenoles, terpenoides y policetona, que al entrar en contacto con los nematodos causan la muerte o repelen directamente la patogenicidad o reproducción de estos. lo mismo (<xref ref-type="bibr" rid="redalyc_785882496008_ref81">Fadiji y Babalola, 2020</xref>).</p>
<p>Los hongos y bacterias endófitas reducen entre 53 % y 76 % la mortalidad de infectivos juveniles de nematodos fitoparásitos y entre 70 % y 81 % repelen los infectivos juveniles al momento de la penetración en el sistema radicular (<xref ref-type="bibr" rid="redalyc_785882496008_ref114">Vetrivelkalai, 2019</xref>). Así mismo inoculaciones combinadas de los siguientes géneros <italic>Pantoea</italic>
<italic> agglomerans</italic>, <italic>Cedecea</italic>
<italic> davisae</italic>, <italic>Enterobacter</italic> spp., y <italic>Pseudomonas putida</italic> redujeron la penetración temprana de <italic>Meloidogyne incógnita</italic> en las raíces del tomate hasta en un 56 % cuando se aplicaron como tratamiento a las semillas (<xref ref-type="bibr" rid="redalyc_785882496008_ref98">Munif <italic>et al</italic>., 2019</xref>).</p>
<p>Las cepas pertenecientes a los géneros <italic>Bacillus</italic>, <italic>Pseudomonas</italic> y <italic>Saccharomyces</italic> sp han sido reconocida por su uso en consorcio y ha demostrado la capacidad de controlar a los nematodos fitoparásitos (<xref ref-type="bibr" rid="redalyc_785882496008_ref87">Khabbaz <italic>et al</italic>., 2019</xref>); antagonizando directamente a los nematodos con la segregación de metabolitos secundarios y proteínas que inhiben físicamente su movimiento (<xref ref-type="bibr" rid="redalyc_785882496008_ref103">Proenca <italic>et al</italic>., 2019</xref>). Además de su capacidad en solubilizar compuestos como fósforo y potasio que promueven el crecimiento vegetal fortaleciendo directamente a la planta en contra del ataque de nematodos fitoparásitos (<xref ref-type="bibr" rid="redalyc_785882496008_ref105">Raymaekers <italic>et al</italic>., 2020</xref>).</p>
<p>El uso de hongos y bacterias endofíticas en inoculaciones combinadas y simples son soluciones prometedoras en el control biológico de nematodos fitoparásitos. Este estudio tiene como objetivo evaluar el efecto de la bacterias y hongos endofíticos nativas de raíces funcionales de plátano sobre el control de <italic>Radopholus similis</italic> y la promoción de crecimiento en vitroplantas de plátano, cultivar CEMSA ¾.</p>
</sec>
<sec>
<title>
<bold>MATERIALES MÉTODOS</bold>
</title>
<sec>
<title>
<bold>Ubicación del sitio y material experimental</bold>
</title>
<p>El estudio se realizó en un invernadero de 300 m<sup>2 </sup>ubicado en la Universidad Nacional Agraria (UNA), en Managua, capital de Nicaragua, ubicada a 12º08 ́52” de latitud Norte y 86º09 ́41” de longitud Oeste. El período del experimento fue de septiembre a diciembre del 2024. Las bacterias fueron dos aislados de <italic>Bacillus subtilis</italic> (B1 y B2), una cepa de <italic>Bacillus cereus</italic> y <italic>Pseudomonas</italic> sp, así como del hongo <italic>Saccharomyces </italic>sp., colectados de raíces funcionales de plantaciones comerciales de plátano del departamento de Rivas. Estos aislados mostraron antagonismo con <italic>Radopholus similis</italic> en ensayos <italic>in vitro</italic> por lo que fueron considerados en inoculaciones simples y combinadas (Cuadro 1) en vitroplantas del cultivar de plátano CEMSA ¾ con seis semanas de aclimatación en un sombreadero.</p>
</sec>
<sec>
<title>
<bold>Diseño experimental</bold>
</title>
<p>Se estableció un arreglo unifactorial en diseño completo al azar (DCA) con 16 tratamientos y cinco repeticiones, para un total de 80 unidades experimentales; cada unidad experimental estuvo representada por una planta. Por cada tratamiento se utilizaron cinco plantas establecidas en macetas de 11 cm de diámetro y 9.7 cm de altura, con un volumen de suelo de 754 gramos.</p>
</sec>
<sec>
<title>
<bold>Preparación de los inóculos de los agentes bacterianos</bold>
</title>
<p>Los aislados bacterianos se cultivaron por separado en placas de agar nutritivo por un periodo de tres días a temperatura ambiente 28 °C. Las unidades formadoras de colonias (UFC), se separaron del medio de cultivo agregando 10 ml de agua destilada estéril, raspando suavemente la superficie con un asa bacteriológica de plástico estéril (<xref ref-type="bibr" rid="redalyc_785882496008_ref79">Chaves <italic>et al</italic>., 2009</xref>). La suspensión se filtró a través de una gasa estéril en un vaso de precipitado previamente esterilizado. Las concentraciones celulares, se ajustaron a UFC mediante escala McFarland a una concentración de 1x10<sup>8 </sup>UFC ml<sup>-1</sup> (<xref ref-type="bibr" rid="redalyc_785882496008_ref82">Gattoni <italic>et al</italic>., 2023</xref>). Para las inoculaciones duales y combinadas se añadió 50:50 de cada suspensión individual, según cada tratamiento (<xref ref-type="table" rid="gt1">Cuadro 1</xref>).</p>
<p>
<table-wrap id="gt1">
<label>Cuadro 1.</label>
<caption>
<title>Descripción de los tratamientos</title>
</caption>
<alt-text>Cuadro 1. Descripción de los tratamientos</alt-text>
<alternatives>
<graphic xlink:href="785882496008_gt14.png" position="anchor" orientation="portrait"/>
<table style="width:100.0%;border-collapse:collapse;" id="gt14-526564616c7963">
<thead style="display:none;">
<tr style="display:none;">
<th style="display:none;"/>
</tr>
</thead>
<tbody>
<tr style="height:1.0pt">
<td style="width:12.64%;border-top:solid windowtext 1.0pt;   border-left:none;border-bottom:solid windowtext 1.0pt;border-right:none;      padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">Tratamiento</td>
<td style="width:70.9%;border-top:solid windowtext 1.0pt;   border-left:none;border-bottom:solid windowtext 1.0pt;border-right:none;      padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">Descripción</td>
<td style="width:16.44%;border-top:solid windowtext 1.0pt;   border-left:none;border-bottom:solid windowtext 1.0pt;border-right:none;      padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">Tipo de inoculación</td>
</tr>
<tr style="height:1.0pt">
<td style="width:12.64%;border:none;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">T1</td>
<td style="width:70.9%;border:none;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">
<italic>Bacillus subtilis</italic> (B1)</td>
<td style="width:16.44%;border:none;border-bottom:solid windowtext 1.0pt;      padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt" rowspan="2">Individual</td>
</tr>
<tr style="height:1.0pt">
<td style="width:12.64%;border:none;border-bottom:solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T2</td>
<td style="width:70.9%;border:none;border-bottom:solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus subtilis</italic> (B2)<italic/>
</td>
</tr>
<tr style="height:1.0pt">
<td style="width:12.64%;border:none;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">T3</td>
<td style="width:70.9%;border:none;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">
<italic>Pseudomonas</italic> sp + <italic>Bacillus subtilis</italic> (B1)<italic/>
</td>
<td style="width:16.44%;border:none;   padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt"/>
</tr>
<tr style="height:1.0pt">
<td style="width:12.64%;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T4</td>
<td style="width:70.9%;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Pseudomonas</italic> sp + <italic>Bacillus subtilis</italic> (B2)<italic/>
</td>
<td style="width:16.44%;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt"/>
</tr>
<tr style="height:1.0pt">
<td style="width:12.64%;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T5</td>
<td style="width:70.9%;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus cereus </italic>+ <italic>Bacillus subtilis</italic> (B1)<italic/>
</td>
<td style="width:16.44%;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt"/>
</tr>
<tr style="height:1.0pt">
<td style="width:12.64%;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T6</td>
<td style="width:70.9%;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus cereus</italic> + <italic>Bacillus subtilis</italic> (B2)<italic/>
</td>
<td style="width:16.44%;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">Dual</td>
</tr>
<tr style="height:1.0pt">
<td style="width:12.64%;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T7</td>
<td style="width:70.9%;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Saccharomyces</italic> sp + <italic>Pseudomonas</italic> spp<italic/>
</td>
<td style="width:16.44%;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt"/>
</tr>
<tr style="height:1.0pt">
<td style="width:12.64%;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T8</td>
<td style="width:70.9%;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Saccharomyces</italic> sp + <italic>Bacillus subtilis</italic> (B1)<italic/>
</td>
<td style="width:16.44%;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt"/>
</tr>
<tr style="height:1.0pt">
<td style="width:12.64%;border:none;border-bottom:solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T9</td>
<td style="width:70.9%;border:none;border-bottom:solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Saccharomyces </italic>sp + <italic>Bacillus subtilis</italic> (B2)<italic/>
</td>
<td style="width:16.44%;border:none;border-bottom:solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt"/>
</tr>
<tr style="height:1.0pt">
<td style="width:12.64%;border:none;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">T10</td>
<td style="width:70.9%;border:none;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">
<italic>Bacillus subtilis</italic> (B1) + <italic>Pseudomonas</italic> sp + <italic>Saccharomyces</italic> sp<italic/>
</td>
<td style="width:16.44%;border:none;   padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt"/>
</tr>
<tr style="height:1.0pt">
<td style="width:12.64%;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T11</td>
<td style="width:70.9%;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus subtilis</italic> (B2) + <italic>Pseudomonas </italic>sp +<italic>Saccharomyces</italic> sp<italic/>
</td>
<td style="width:16.44%;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt"/>
</tr>
<tr style="height:1.0pt">
<td style="width:12.64%;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T12</td>
<td style="width:70.9%;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus cereus</italic> + <italic>Pseudomonas</italic> sp + <italic>Saccharomyces</italic> sp + <italic>Bacillus subtilis</italic> (B1)<italic/>
</td>
<td style="width:16.44%;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">Combinada</td>
</tr>
<tr style="height:1.0pt">
<td style="width:12.64%;border:none;border-bottom:solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T13</td>
<td style="width:70.9%;border:none;border-bottom:solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus cereus</italic> + <italic>Pseudomonas</italic> sp + <italic>Saccharomyces</italic> sp + <italic>Bacillus subtilis</italic> (B2)<italic/>
</td>
<td style="width:16.44%;border:none;border-bottom:solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt"/>
</tr>
<tr style="height:1.0pt">
<td style="width:12.64%;border:none;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">T14</td>
<td style="width:70.9%;border:none;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">
<italic>Bacillus cereus</italic>
</td>
<td style="width:16.44%;border:none;border-bottom:solid windowtext 1.0pt;      padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt" rowspan="2">Individual</td>
</tr>
<tr style="height:1.0pt">
<td style="width:12.64%;border:none;border-bottom:solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T15</td>
<td style="width:70.9%;border:none;border-bottom:solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Saccharomyces</italic> sp<italic/>
</td>
</tr>
<tr style="height:1.0pt">
<td style="width:12.64%;border:none;border-bottom:solid windowtext 1.0pt;      padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T16</td>
<td style="width:70.9%;border:none;border-bottom:solid windowtext 1.0pt;      padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">Testigo</td>
<td style="width:16.44%;border:none;border-bottom:solid windowtext 1.0pt;      padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">Solución con nemátodos</td>
</tr>
</tbody>
</table>
</alternatives>
</table-wrap>
</p>
</sec>
<sec>
<title>
<bold>Variables evaluadas</bold>
</title>
<p>
<bold>Penetración de nematodos. </bold>Se realizaron cuatro inoculaciones individuales, sietes duales, cuatro combinadas y un control (<xref ref-type="table" rid="gt1">Cuadro 1</xref>), que consistió en la aplicación de una solución con los nematodos. Los inóculos de nematodos se obtuvieron de una población de <italic>Radopholus similis</italic> previamente de la cría de un cultivo monoxénico de <italic>Radopholus similis</italic> que crecieron en tres discos de zanahoria (<italic>Daucus carota</italic> L.). Dos semanas después, cada plántula fue inoculada con una población mixta de 500 nematodos juveniles, hembras y machos, realizando tres orificios a una profundidad entre 2 cm y 3 cm alrededor de la base del pseudotallo. <bold/>
</p>
<p>A los siete días después de la inoculación de lo nematodos, las plantas se retiraron de las macetas y los nematodos fueron aislados de las raíces mediante el método de maceración y tamizado. La suspensión obtenida se cuantificó utilizando dos alícuotas (muestras) de 2 ml en una gradilla de conteo bajo microscopía de luz, con lo que se estimó el número de nematodos por gramo de raíz fresca (<xref ref-type="bibr" rid="redalyc_785882496008_ref94">Mendoza <italic>et al</italic>., 2009</xref>). La eficiencia de penetración (EP) de <italic>Radopholus similis</italic> se calculó conforme a la fórmula descrita por <xref ref-type="bibr" rid="redalyc_785882496008_ref116">Zum Felde <italic>et al</italic>. (2006)</xref>.</p>
<p>
<fig id="gf1">
<graphic xlink:href="785882496008_gf4.png" position="anchor" orientation="portrait">
<alt-text/>
</graphic>
</fig>
</p>
<p>
<bold>Control biológico (%).  </bold>A las ocho semanas después de la inoculación de los nematodos se determinó el porcentaje de control, siguiendo la metodología descrita por <xref ref-type="bibr" rid="redalyc_785882496008_ref76">Araya, (2002)</xref>. La cuantificación de <italic>Radopholus similis </italic>se estimó sobre la base del número total de nematodos en 10 g de raíces por planta. La eficacia de control biológico fue evaluada mediante la fórmula de <xref ref-type="bibr" rid="redalyc_785882496008_ref79">Chaves <italic>et al</italic>. (2009)</xref>.</p>
<p>
<fig id="gf2">
<graphic xlink:href="785882496008_gf5.png" position="anchor" orientation="portrait">
<alt-text/>
</graphic>
</fig>
</p>
<p>Para registrar el número de nematodos en el sistema radicular tratado en los 10 gramos de raíz, se contabilizaron el total de nematodos en una alícuota de 1 ml de la solución de nematodos extraído por el método de maceración y tamizado, usando una cámara de conteo de nematodos mediante microscopía de luz.</p>
</sec>
<sec>
<title>
<bold>Crecimiento de vitroplantas</bold>
</title>
<p>
<bold>Altura planta (cm).</bold> Se midió con una regla desde la base del pseudotallo al traslape de la hoja 1 y 2.</p>
<p>
<bold>Diámetro del pseudotallo (mm).</bold> Se cuantificó con la ayuda de un vernier digital a dos centímetros de la base del pseudotallo.</p>
<p>
<bold>Peso fresco raíz (g).</bold> En cada planta se separó con un bisturí las raíces del pseudotallo, para registrar su peso con una balanza digital Ohaus de 0.01 g a 4 000 g.<bold/>
</p>
<p>
<bold>Peso fresco foliar (g).</bold> Se separaron las hojas y se pesaron con la misma balanza digital que se usó para determinar el peso fresco de raíz.</p>
<p>
<bold>Peso fresco total. </bold>Se registro el peso total de la planta (hoja, pseudotallo y raíz) con la misma balanza digital que se usó para determinar el peso fresco de raíz.</p>
<p>
<bold>Análisis de datos. </bold>Para comprobar los supuestos de normalidad y homogeneidad de varianza, se empleó transformación con la función arcoseno para el porcentaje de penetración y control biológico, luego se realizó un análisis de varianza (ANDEVA). Al encontrar diferencias estadísticas, se compararon las medias a través de la prueba de diferencias mínimas de Tukey con un margen de error del 5 %, empleando el Software R versión 4.5.2 (<xref ref-type="bibr" rid="redalyc_785882496008_ref117">R Core Team, 2025</xref>).</p>
</sec>
</sec>
<sec>
<title>
<bold>RESULTADOS Y DISCUSIÓN</bold>
</title>
<sec>
<title>
<bold>Total</bold>
<bold> de nematodos y penetración (%)</bold>
</title>
<p>Se presentan diferencias estadísticas en el número total de nematodos y en el porcentaje de penetración en las raíces (<xref ref-type="table" rid="gt2">Cuadro 2</xref>), también se observa que en la medida que disminuye la población total de nematodos, existen menores porcentajes de penetración, lo que indica una eficacia en el control de <italic>Radopholus similis</italic>.</p>
<p>El tratamiento a base de <italic>Saccharomyces</italic> sp., presentó mayor número total de nematodos, lo que indica que, aplicado de manera aislada, no reduce significativamente las poblaciones, al no lograr reducir la penetración ni su población final, mostrando valores similares al testigo. Este resultado demostró que <italic>Saccharomyces</italic> sp, no poseen mecanismos suficientes para reducir el proceso de invasión o establecimiento de <italic>Radopholus similis</italic>.</p>
<p>Los tratamientos más efectivos tanto para el número total como para el porcentaje de penetración corresponden a aquellos conformados solo por <italic>Bacillus subtilis</italic>, combinados entre sí o combinado con <italic>Pseudomonas </italic>sp. Estos tratamientos reducen la penetración y el establecimiento del nematodo en las raíces, lo que sugiere que <italic>Bacillus</italic>, en especial <italic>Bacillus subtilis</italic>, posee mecanismos que limitan tanto la invasión como la multiplicación de este nematodo, lo que lo clasifica como un biocontrolador de nematodos fitoparásitos.</p>
<p>
<italic>Bacillus subtilis </italic>es una bacteria que logra reducir el número de infectivos juveniles de nematodos en el sistema radicular, ya que produce metabolitos como lipopéptidos y proteasas que tienen un efecto nematicida, lo que afecta la capacidad de penetración (<xref ref-type="bibr" rid="redalyc_785882496008_ref84">Jiang <italic>et al</italic>.<underline>,</underline> 2021</xref>, <xref ref-type="bibr" rid="redalyc_785882496008_ref101">Patil <italic>et al</italic>., 2019</xref>).</p>
<p>Las combinaciones múltiples entre <italic>Bacillus</italic>, <italic>Pseudomonas</italic> spp., y <italic>Saccharomyces</italic> sp., presentaron eficacia intermedia, lo que podría ocurrir debido a interacciones negativas entre estos microorganismos que disminuyen su acción antagónica, sin embargo, <xref ref-type="bibr" rid="redalyc_785882496008_ref111">Sikora <italic>et al</italic>. (2010)</xref>; <xref ref-type="bibr" rid="redalyc_785882496008_ref106">Reimann <italic>et al</italic>. (2008)</xref>, determinaron que las combinaciones de hongos y bacterias reducen la penetración de <italic>Radopholus similis</italic> en comparación con aplicaciones individuales; información similar fue publicada por <xref ref-type="bibr" rid="redalyc_785882496008_ref92">Martínuz <italic>et al</italic>. (2012)</xref>, quienes indican que la inoculación simple y combinada tienen el potencial de reducir la penetración de nematodos en las raíces de plátano.</p>
<p>
<table-wrap id="gt2">
<label>Cuadro 2.</label>
<caption>
<title>Total de individuos y porcentaje de penetración de <italic>Radopholus similis</italic> a los siete días después de la inoculación</title>
<p>Promedios con letras iguales no difieren estadísticamente al 95 % de confianza.</p>
</caption>
<alt-text>Cuadro 2. Total de individuos y porcentaje de penetración de Radopholus similis a los siete días después de la inoculación</alt-text>
<alternatives>
<graphic xlink:href="785882496008_gt9.png" position="anchor" orientation="portrait"/>
<table style="width:462.1pt;margin-left:-15.55pt;border-collapse:collapse;" id="gt9-526564616c7963">
<thead style="display:none;">
<tr style="display:none;">
<th style="display:none;"/>
</tr>
</thead>
<tbody>
<tr style="height:1.0pt">
<td style="width:55.5pt;border-top:solid windowtext 1.0pt;   border-left:none;border-bottom:solid windowtext 1.0pt;border-right:none;      padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">Tratamiento</td>
<td style="width:300.25pt;border-top:solid windowtext 1.0pt;   border-left:none;border-bottom:solid windowtext 1.0pt;border-right:none;      padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">Descripción de los tratamientos</td>
<td style="width:49.65pt;border-top:solid windowtext 1.0pt;   border-left:none;border-bottom:solid windowtext 1.0pt;border-right:none;      padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">Total de nematodos</td>
<td style="width:2.0cm;border-top:solid windowtext 1.0pt;   border-left:none;border-bottom:solid windowtext 1.0pt;border-right:none;      padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">Penetración (%)</td>
</tr>
<tr style="height:1.0pt">
<td style="width:55.5pt;border:none;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">  T15</td>
<td style="width:300.25pt;border:none;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">
<italic>Saccharomyces</italic> sp</td>
<td style="width:49.65pt;border:none;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">36 a</td>
<td style="width:2.0cm;border:none;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">  7 ab</td>
</tr>
<tr style="height:1.0pt">
<td style="width:55.5pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">   T16</td>
<td style="width:300.25pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">Testigo</td>
<td style="width:49.65pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  32 ab</td>
<td style="width:2.0cm;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">8 a</td>
</tr>
<tr style="height:1.0pt">
<td style="width:55.5pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">   T12</td>
<td style="width:300.25pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus cereus</italic> + <italic>Pseudomonas</italic> sp + <italic>Saccharomyces</italic> sp + <italic>Bacillus subtilis</italic> (B1)</td>
<td style="width:49.65pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">    30 abc</td>
<td style="width:2.0cm;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  6 bc</td>
</tr>
<tr style="height:1.0pt">
<td style="width:55.5pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">   T10</td>
<td style="width:300.25pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus subtilis</italic> (B1) + <italic>Pseudomonas</italic> sp + <italic>Saccharomyces</italic> sp</td>
<td style="width:49.65pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">    26 bcd</td>
<td style="width:2.0cm;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">    5 cde</td>
</tr>
<tr style="height:1.0pt">
<td style="width:55.5pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">   T11</td>
<td style="width:300.25pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus subtilis</italic> (B2) + <italic>Pseudomonas </italic>sp +<italic>Saccharomyces</italic> sp</td>
<td style="width:49.65pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">    26 bcd</td>
<td style="width:2.0cm;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">    5 cde</td>
</tr>
<tr style="height:1.0pt">
<td style="width:55.5pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  T2</td>
<td style="width:300.25pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus</italic>
<italic> subtilis</italic> (B2)</td>
<td style="width:49.65pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">     24 bcde</td>
<td style="width:2.0cm;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">    5 cde</td>
</tr>
<tr style="height:1.0pt">
<td style="width:55.5pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  T8</td>
<td style="width:300.25pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Saccharomyces</italic> sp + <italic>Bacillus subtilis</italic> (B1)</td>
<td style="width:49.65pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">     24 bcde</td>
<td style="width:2.0cm;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">    5 cde</td>
</tr>
<tr style="height:1.0pt">
<td style="width:55.5pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">    T13</td>
<td style="width:300.25pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus cereus</italic> + <italic>Pseudomonas</italic> sp +<italic> Saccharomyces</italic> sp / <italic>Bacillus subtilis</italic> (B2)</td>
<td style="width:49.65pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">     24 bcde</td>
<td style="width:2.0cm;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">    5 cde</td>
</tr>
<tr style="height:1.0pt">
<td style="width:55.5pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">    T14</td>
<td style="width:300.25pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus</italic>
<italic> cereus</italic>
</td>
<td style="width:49.65pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">    22 cde</td>
<td style="width:2.0cm;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">    5 cde</td>
</tr>
<tr style="height:1.0pt">
<td style="width:55.5pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  T4</td>
<td style="width:300.25pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Pseudomonas</italic> sp + <italic>Bacillus subtilis</italic> (B2)</td>
<td style="width:49.65pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">    23 cde</td>
<td style="width:2.0cm;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">    5 cde</td>
</tr>
<tr style="height:1.0pt">
<td style="width:55.5pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  T9</td>
<td style="width:300.25pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Saccharomyces </italic>sp + <italic>Bacillus subtilis</italic> (B2)</td>
<td style="width:49.65pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">    23 cde</td>
<td style="width:2.0cm;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">    6 bcd</td>
</tr>
<tr style="height:1.0pt">
<td style="width:55.5pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  T7</td>
<td style="width:300.25pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Saccharomyces</italic> sp + <italic>Pseudomonas</italic> spp</td>
<td style="width:49.65pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  21 de</td>
<td style="width:2.0cm;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">    5 cde</td>
</tr>
<tr style="height:1.0pt">
<td style="width:55.5pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  T6</td>
<td style="width:300.25pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus cereus</italic> + <italic>Bacillus subtilis</italic> (B2)</td>
<td style="width:49.65pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  21 de</td>
<td style="width:2.0cm;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  4 de</td>
</tr>
<tr style="height:1.0pt">
<td style="width:55.5pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  T3</td>
<td style="width:300.25pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Pseudomonas</italic> sp + <italic>Bacillus subtilis</italic> (B1)</td>
<td style="width:49.65pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  19 de</td>
<td style="width:2.0cm;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  4 de</td>
</tr>
<tr style="height:1.0pt">
<td style="width:55.5pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  T5</td>
<td style="width:300.25pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus cereus +</italic>
<italic>Bacillus subtilis</italic> (B1)</td>
<td style="width:49.65pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  19 de</td>
<td style="width:2.0cm;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  4 de</td>
</tr>
<tr style="height:1.0pt">
<td style="width:55.5pt;border:none;border-bottom:   solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">  T1</td>
<td style="width:300.25pt;border:none;border-bottom:   solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">
<italic>Bacillus subtilis</italic> (B1)</td>
<td style="width:49.65pt;border:none;border-bottom:   solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">18 e</td>
<td style="width:2.0cm;border:none;border-bottom:   solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">3 e</td>
</tr>
<tr style="height:1.0pt">
<td style="width:55.5pt;border:none;border-bottom:   solid windowtext 1.0pt;padding:   0cm 3.5pt 0cm 3.5pt;height:1.0pt">
<italic>p</italic> ≤ 0.05</td>
<td style="width:300.25pt;border:none;border-bottom:   solid windowtext 1.0pt;padding:   0cm 3.5pt 0cm 3.5pt;height:1.0pt"/>
<td style="width:49.65pt;border:none;border-bottom:   solid windowtext 1.0pt;padding:   0cm 3.5pt 0cm 3.5pt;height:1.0pt">
<italic>p</italic> = 0.0001<italic/>
</td>
<td style="width:2.0cm;border:none;border-bottom:   solid windowtext 1.0pt;padding:   0cm 3.5pt 0cm 3.5pt;height:1.0pt">
<italic>p </italic>= 0.0001</td>
</tr>
</tbody>
</table>
</alternatives>
</table-wrap>
</p>
</sec>
<sec>
<title>
<bold>Control biológico (%)</bold>
</title>
<p>Se obtuvo diferencias estadísticas en el control biologico de <italic>Radopholus similis</italic>, las inoculaciones de <italic>Bacillus</italic>
<italic> cereus</italic> + <italic>Pseudomonas</italic> sp + <italic>Saccharomyces</italic> sp + <italic>Bacillus</italic>
<italic> subtilis</italic> (B1), al igual que <italic>Bacillus</italic>
<italic> subtilis</italic> (B2) + <italic>Pseudomonas</italic> sp + <italic>Saccharomyces</italic> sp, así como <italic>Bacillus</italic>
<italic> subtilis</italic> (B2) + <italic>Pseudomonas</italic> sp + <italic>Saccharomyces</italic> sp., al igual que <italic>Bacillus</italic>
<italic> subtilis</italic> (B2) y <italic>Saccharomyces</italic> sp + <italic>Bacillus</italic>
<italic> subtilis</italic> (B1), redujeron las poblaciones entre 78 % y 83 % (<xref ref-type="table" rid="gt3">Cuadro 3</xref>), se demuestra que las inoculaciones combinadas de bacterias endófitas reducen las poblaciones de <italic>Radopholus similis</italic>.</p>
<p>Los resultados indica que las inoculaciones aisladas, no reducen significativamente las poblaciones de nematodos. Estos resultados indican que <italic>Bacillus subtilis</italic> inoculado de manera aislada no posee mecanismos suficientes para reducir las poblaciones de <italic>Radopholus similis</italic>.</p>
<p>
<italic>Bacillus subtilis</italic> es una bacteria gram positiva que produce compuestos bioactivos, incluyendo enzimas, antibióticos y toxinas nematicidas, que degradan la cutícula y afectan la movilidad, el desarrollo y la reproducción de los nematodos (<xref ref-type="bibr" rid="redalyc_785882496008_ref96">Migunova <italic>et al</italic>., 2021</xref>; <xref ref-type="bibr" rid="redalyc_785882496008_ref113">Vasantha-Srinivasan <italic>et al</italic>., 2025</xref>).</p>
<p>
<italic>Saccharomyces </italic>sp, aumenta la producción de catalasa y la pectina metil esterasa en raíces de banano reduciendo eficazmente la población de nematodos (<xref ref-type="bibr" rid="redalyc_785882496008_ref83">Hamouda <italic>et al</italic>., 2019</xref>). los hongos emplean diversas estrategias de control de nematodos entre ellas una amplia variedad de metabolitos secundarios que controla nematodos fitoparásitos e induce la resistencia por parte de las plantas (<xref ref-type="bibr" rid="redalyc_785882496008_ref85">Karajeh, 2013</xref>; <xref ref-type="bibr" rid="redalyc_785882496008_ref102">Pires <italic>et al.</italic>, 2022</xref>).</p>
<p>
<xref ref-type="bibr" rid="redalyc_785882496008_ref111">Sikora <italic>et al</italic>. (2010)</xref>; <xref ref-type="bibr" rid="redalyc_785882496008_ref106">Reimann <italic>et al</italic>. (2008)</xref>, determinaron que las combinaciones de hongos y bacterias reducen las poblaciones de <italic>Radopholus similis</italic> en comparación con aplicaciones individuales; información similar fue publicada por <xref ref-type="bibr" rid="redalyc_785882496008_ref104">Quevedo <italic>et al</italic>. (2021)</xref>, quienes indican interacciones microbianas que promueven la producción de diversos compuestos activos que favorecen el crecimiento vegetal, así como la atracción, interrupción de la reproduccion y depredación de nematodos fitopatógenos.</p>
<p>
<table-wrap id="gt3">
<label>Cuadro 3.</label>
<caption>
<title>Control biológico de <italic>Radopholus similis</italic> por microorganismos endofíticos</title>
<p>Promedios con letras iguales no difieren estadísticamente al 95 % de confianza.</p>
</caption>
<alt-text>Cuadro 3. Control biológico de Radopholus similis por microorganismos endofíticos</alt-text>
<alternatives>
<graphic xlink:href="785882496008_gt10.png" position="anchor" orientation="portrait"/>
<table style="width:427.0pt;border-collapse:collapse;  " id="gt10-526564616c7963">
<thead style="display:none;">
<tr style="display:none;">
<th style="display:none;"/>
</tr>
</thead>
<tbody>
<tr style="height:1.0pt">
<td style="width:60.0pt;border-top:solid windowtext 1.0pt;   border-left:none;border-bottom:solid windowtext 1.0pt;border-right:none;      padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">Tratamiento</td>
<td style="width:293.0pt;border-top:solid windowtext 1.0pt;   border-left:none;border-bottom:solid windowtext 1.0pt;border-right:none;      padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">Descripción</td>
<td style="width:74.0pt;border-top:solid windowtext 1.0pt;   border-left:none;border-bottom:solid windowtext 1.0pt;border-right:none;      padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">Biocontrol (%)</td>
</tr>
<tr style="height:1.0pt">
<td style="width:60.0pt;border:none;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt"> T12</td>
<td style="width:293.0pt;border:none;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">
<italic>Bacillus cereus</italic> + <italic>Pseudomona</italic> sp + <italic>Saccharomyces</italic> sp + <italic>Bacillus subtilis</italic> (B1)</td>
<td style="width:74.0pt;border:none;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">83 a</td>
</tr>
<tr style="height:1.0pt">
<td style="width:60.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt"> T11</td>
<td style="width:293.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus subtilis</italic> (B2) + <italic>Pseudomona </italic>sp +<italic>Saccharomyces</italic> sp</td>
<td style="width:74.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">83 a</td>
</tr>
<tr style="height:1.0pt">
<td style="width:60.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt"> T10</td>
<td style="width:293.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus subtilis</italic> (B1) + <italic>Pseudomona</italic> sp + <italic>Saccharomyces</italic> sp</td>
<td style="width:74.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">83 a</td>
</tr>
<tr style="height:1.0pt">
<td style="width:60.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T2</td>
<td style="width:293.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus subtilis</italic> (B2)</td>
<td style="width:74.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">79 a</td>
</tr>
<tr style="height:1.0pt">
<td style="width:60.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T8</td>
<td style="width:293.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Saccharomyces</italic> sp +<italic>Bacillus subtilis</italic> (B1)</td>
<td style="width:74.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">78 a</td>
</tr>
<tr style="height:1.0pt">
<td style="width:60.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  T15</td>
<td style="width:293.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Saccharomyces</italic> sp</td>
<td style="width:74.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  75 ab</td>
</tr>
<tr style="height:1.0pt">
<td style="width:60.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  T14</td>
<td style="width:293.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus cereus</italic>
</td>
<td style="width:74.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  73 ab</td>
</tr>
<tr style="height:1.0pt">
<td style="width:60.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T4</td>
<td style="width:293.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Pseudomonas</italic> sp + <italic>Bacillus subtilis</italic> (B2)</td>
<td style="width:74.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  73 ab</td>
</tr>
<tr style="height:1.0pt">
<td style="width:60.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T9</td>
<td style="width:293.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Saccharomyces </italic>sp + <italic>Bacillus subtilis</italic> (B2)</td>
<td style="width:74.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  69 ab</td>
</tr>
<tr style="height:1.0pt">
<td style="width:60.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T7</td>
<td style="width:293.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Saccharomyces</italic> sp + <italic>Pseudomona</italic> spp</td>
<td style="width:74.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  67 ab</td>
</tr>
<tr style="height:1.0pt">
<td style="width:60.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  T13</td>
<td style="width:293.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus cereus</italic> + <italic>Pseudomona</italic> sp /<italic> Saccharomyces</italic> sp / <italic>Bacillus subtilis</italic> (B2)</td>
<td style="width:74.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  66 ab</td>
</tr>
<tr style="height:1.0pt">
<td style="width:60.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T6</td>
<td style="width:293.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus cereus</italic> + <italic>Bacillus subtilis</italic> (B2)</td>
<td style="width:74.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  65 ab</td>
</tr>
<tr style="height:1.0pt">
<td style="width:60.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T3</td>
<td style="width:293.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Pseudomonas</italic> sp + <italic>Bacillus subtilis</italic> (B1)</td>
<td style="width:74.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  64 ab</td>
</tr>
<tr style="height:1.0pt">
<td style="width:60.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T5</td>
<td style="width:293.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus cereus + Bacillus subtilis</italic> (B1)</td>
<td style="width:74.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  61 ab</td>
</tr>
<tr style="height:1.0pt">
<td style="width:60.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T1</td>
<td style="width:293.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus Subtilis</italic> (B1)<italic/>
</td>
<td style="width:74.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  59 ab</td>
</tr>
<tr style="height:1.0pt">
<td style="width:60.0pt;border:none;border-bottom:   solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">  T16</td>
<td style="width:293.0pt;border:none;border-bottom:   solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">Testigo</td>
<td style="width:74.0pt;border:none;border-bottom:   solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">51 b</td>
</tr>
<tr style="height:1.0pt">
<td style="width:60.0pt;border:none;border-bottom:   solid windowtext 1.0pt;padding:   0cm 3.5pt 0cm 3.5pt;height:1.0pt">
<italic>p</italic> ≤ 0.05</td>
<td style="width:293.0pt;border:none;border-bottom:   solid windowtext 1.0pt;padding:   0cm 3.5pt 0cm 3.5pt;height:1.0pt"/>
<td style="width:74.0pt;border:none;border-bottom:   solid windowtext 1.0pt;padding:   0cm 3.5pt 0cm 3.5pt;height:1.0pt">
<italic>p</italic> = 0.0005</td>
</tr>
</tbody>
</table>
</alternatives>
</table-wrap>
</p>
</sec>
<sec>
<title>
<bold>Crecimiento de vitroplantas</bold>
</title>
<p>Se obtuvo diferencias estadísticas en la altura de las vitroplantas, las inoculaciones de <italic>Bacillus</italic>
<italic> cereus</italic> + <italic>Pseudomonas</italic> sp +<italic> Saccharomyces</italic> sp + <italic>Bacillus</italic>
<italic> subtilis</italic> (B2) y <italic>Bacillus</italic>
<italic> cereus</italic> + <italic>Pseudomonas</italic> sp + <italic>Saccharomyces</italic> sp + <italic>Bacillus</italic>
<italic> subtilis</italic> (B1), presentaron mayor altura respecto al tratamiento <italic>Saccharomyces </italic>sp + <italic>Bacillus</italic>
<italic> subtilis</italic> (B2) (<xref ref-type="table" rid="gt4">Cuadro 4</xref>).</p>
<p>Los organismos endofíticos colonizan los tejidos internos de las plantas, estableciendo relaciones simbióticas que favorecen significativamente las variables de crecimiento como la altura y diámetro del pseudotallo (<xref ref-type="bibr" rid="redalyc_785882496008_ref109">Santos <italic>et al</italic>., 2018</xref>).</p>
<p>El género <italic>Bacillus</italic> es un promotor del crecimiento vegetativo sintetizando fitohormonas como el ácido indolacético (auxina), que estimula la elongación y división celular; infiriendo de esta forma en el aumento de la altura de las plantas (<xref ref-type="bibr" rid="redalyc_785882496008_ref86">Karthik <italic>et al</italic>., 2017</xref>; <xref ref-type="bibr" rid="redalyc_785882496008_ref90">Manohar y Selvarajan, 2018</xref>; <xref ref-type="bibr" rid="redalyc_785882496008_ref115">Yusadi <italic>et al</italic>., 2025</xref>).</p>
<p>El diámetro del pseudotallo presentó diferencias estadísticas. El mayor diámetro lo presentó el testigo respecto al tratamiento <italic>Saccharomyces </italic>sp + <italic>Bacillus</italic>
<italic> subtilis</italic> (B2).</p>
<p>
<italic>Bacillus</italic> mejora la absorción de agua y nutrientes, lo que se relaciona directamente con la altura y aumento del diámetro del pseudotallo (<xref ref-type="bibr" rid="redalyc_785882496008_ref80">Chen <italic>et al</italic>., 2000</xref>; <xref ref-type="bibr" rid="redalyc_785882496008_ref108">Ruelas-Islas <italic>et al</italic>., 2023</xref>).</p>
<p>
<table-wrap id="gt4">
<label>Cuadro 4.</label>
<caption>
<title>Altura de planta y diámetro del pseudotallo en respuesta a inoculaciones simples y combinadas de hongos y bacterias endofiticas</title>
<p>Promedios con letras iguales no difieren estadísticamente al 95 % de confianza.</p>
</caption>
<alt-text>Cuadro 4. Altura de planta y diámetro del pseudotallo en respuesta a inoculaciones simples y combinadas de hongos y bacterias endofiticas</alt-text>
<alternatives>
<graphic xlink:href="785882496008_gt11.png" position="anchor" orientation="portrait"/>
<table style="width:501.25pt;margin-left:-19.3pt;border-collapse:collapse;" id="gt11-526564616c7963">
<thead style="display:none;">
<tr style="display:none;">
<th style="display:none;"/>
</tr>
</thead>
<tbody>
<tr style="height:1.0pt">
<td style="width:51.0pt;border-top:solid windowtext 1.0pt;   border-left:none;border-bottom:solid windowtext 1.0pt;border-right:none;      padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">Tratamiento</td>
<td style="width:294.35pt;border-top:solid windowtext 1.0pt;   border-left:none;border-bottom:solid windowtext 1.0pt;border-right:none;      padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">Descripción</td>
<td style="width:92.15pt;border-top:solid windowtext 1.0pt;   border-left:none;border-bottom:solid windowtext 1.0pt;border-right:none;      padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">Diámetro del pseudotallo (mm)</td>
<td style="width:63.75pt;border-top:solid windowtext 1.0pt;   border-left:none;border-bottom:solid windowtext 1.0pt;border-right:none;      padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">Altura de plántula (cm)</td>
</tr>
<tr style="height:1.0pt">
<td style="width:51.0pt;border:none;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">  T16</td>
<td style="width:294.35pt;border:none;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">Testigo</td>
<td style="width:92.15pt;border:none;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt"> 7.2 ab</td>
<td style="width:63.75pt;border:none;padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">6.3 a</td>
</tr>
<tr style="height:1.0pt">
<td style="width:51.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T6</td>
<td style="width:294.35pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus cereus</italic> + <italic>Bacillus subtilis</italic> (B2)<italic/>
</td>
<td style="width:92.15pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">   6.9 abc</td>
<td style="width:63.75pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  5.8 ab</td>
</tr>
<tr style="height:1.0pt">
<td style="width:51.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  T13</td>
<td style="width:294.35pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus cereus</italic> + <italic>Pseudomonas</italic> sp +<italic> Saccharomyces</italic> sp + <italic>Bacillus subtilis</italic> (B2)<italic/>
</td>
<td style="width:92.15pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">                  7.4 a</td>
<td style="width:63.75pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">    5.7 abc</td>
</tr>
<tr style="height:1.0pt">
<td style="width:51.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T7</td>
<td style="width:294.35pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Saccharomyces</italic> sp + <italic>Pseudomonas</italic> spp<italic/>
</td>
<td style="width:92.15pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">   6.9 abc</td>
<td style="width:63.75pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">    5.7 abc</td>
</tr>
<tr style="height:1.0pt">
<td style="width:51.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T8</td>
<td style="width:294.35pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Saccharomyces</italic> sp + <italic>Bacillus subtilis</italic> (B1)<italic/>
</td>
<td style="width:92.15pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt"> 7.1 ab</td>
<td style="width:63.75pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">    5.4 bcd</td>
</tr>
<tr style="height:1.0pt">
<td style="width:51.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  T10</td>
<td style="width:294.35pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus subtilis</italic> (B1) + <italic>Pseudomonas</italic> sp + <italic>Saccharomyces</italic> sp<italic/>
</td>
<td style="width:92.15pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">     6.6 abcd</td>
<td style="width:63.75pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">      5.2 bcde</td>
</tr>
<tr style="height:1.0pt">
<td style="width:51.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  T12</td>
<td style="width:294.35pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus cereus</italic> + <italic>Pseudomonas</italic> sp + <italic>Saccharomyces</italic> sp + <italic>Bacillus subtilis</italic> (B1)<italic/>
</td>
<td style="width:92.15pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">                  7.4 a</td>
<td style="width:63.75pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">      5.2 bcde</td>
</tr>
<tr style="height:1.0pt">
<td style="width:51.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  T15</td>
<td style="width:294.35pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Saccharomyces</italic> sp<italic/>
</td>
<td style="width:92.15pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">   6.9 abc</td>
<td style="width:63.75pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">      5.1 bcde</td>
</tr>
<tr style="height:1.0pt">
<td style="width:51.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T1</td>
<td style="width:294.35pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic> Bacillus subtilis</italic> (B1)<italic/>
</td>
<td style="width:92.15pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt"> 6.1 cd</td>
<td style="width:63.75pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">        5.0  bcdef</td>
</tr>
<tr style="height:1.0pt">
<td style="width:51.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  T14</td>
<td style="width:294.35pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus</italic>
<italic> cereus</italic>
</td>
<td style="width:92.15pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">   6.8 abc</td>
<td style="width:63.75pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">       5.0 bcdef</td>
</tr>
<tr style="height:1.0pt">
<td style="width:51.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T5</td>
<td style="width:294.35pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus cereus +</italic>
<italic>Bacillus subtilis</italic> (B1)<italic/>
</td>
<td style="width:92.15pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">   6.8 abc</td>
<td style="width:63.75pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">       5.4 cdefg</td>
</tr>
<tr style="height:1.0pt">
<td style="width:51.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  T11</td>
<td style="width:294.35pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus subtilis</italic> (B2) + <italic>Pseudomonas </italic>sp /<italic>Saccharomyces</italic> sp<italic/>
</td>
<td style="width:92.15pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">   7.0 abc</td>
<td style="width:63.75pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">     4.9 defg</td>
</tr>
<tr style="height:1.0pt">
<td style="width:51.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T4</td>
<td style="width:294.35pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Pseudomonas</italic> sp + <italic>Bacillus subtilis</italic> (B2)<italic/>
</td>
<td style="width:92.15pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">   6.8 abc</td>
<td style="width:63.75pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">     4.6 defg</td>
</tr>
<tr style="height:1.0pt">
<td style="width:51.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T2</td>
<td style="width:294.35pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Bacillus</italic>
<italic> subtilis</italic> (B2)<italic/>
</td>
<td style="width:92.15pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt"> 6.2 cd</td>
<td style="width:63.75pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">   4.4 efg</td>
</tr>
<tr style="height:1.0pt">
<td style="width:51.0pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">T3</td>
<td style="width:294.35pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">
<italic>Pseudomonas</italic> sp + <italic>Bacillus subtilis</italic> (B1)<italic/>
</td>
<td style="width:92.15pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">   6.3 bcd</td>
<td style="width:63.75pt;padding:0cm 3.5pt 0cm 3.5pt;   height:1.0pt">  4.3 fg</td>
</tr>
<tr style="height:1.0pt">
<td style="width:51.0pt;border:none;border-bottom:   solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">T9</td>
<td style="width:294.35pt;border:none;border-bottom:   solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">
<italic>Saccharomyces </italic>sp + <italic>Bacillus subtilis</italic> (B2)<italic/>
</td>
<td style="width:92.15pt;border:none;border-bottom:   solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">                  5.7 d</td>
<td style="width:63.75pt;border:none;border-bottom:   solid windowtext 1.0pt;   padding:0cm 3.5pt 0cm 3.5pt;height:1.0pt">4.2 g</td>
</tr>
<tr style="height:1.0pt">
<td style="width:51.0pt;border:none;border-bottom:   solid windowtext 1.0pt;padding:   0cm 3.5pt 0cm 3.5pt;height:1.0pt">
<italic>p</italic> ≤ 0.05</td>
<td style="width:294.35pt;border:none;border-bottom:   solid windowtext 1.0pt;padding:   0cm 3.5pt 0cm 3.5pt;height:1.0pt"/>
<td style="width:92.15pt;border:none;border-bottom:   solid windowtext 1.0pt;padding:   0cm 3.5pt 0cm 3.5pt;height:1.0pt">
<italic>p </italic>= 0.0001</td>
<td style="width:63.75pt;border:none;border-bottom:   solid windowtext 1.0pt;padding:   0cm 3.5pt 0cm 3.5pt;height:1.0pt">
<italic>p </italic>= 0.0001</td>
</tr>
</tbody>
</table>
</alternatives>
</table-wrap>
</p>
</sec>
<sec>
<title>
<bold>Biomasa de la vitroplantas</bold>
</title>
<p>Se presentan diferencias estadísticas en el peso fresco de raíz, hojas y peso fresco total (Cuadro 5). Los tratamientos a base de <italic>Saccharomyces</italic> sp + <italic>Bacillus</italic>
<italic> subtilis</italic> (B1) y <italic>Saccharomyces</italic> sp + <italic>Pseudomonas</italic> spp obtuvieron el mayor peso fresco de raíz. El mayor peso fresco foliar (14.26) y peso fresco total (43.44) se obtiene con el tratamiento a base de <italic>Saccharomyces</italic> sp + <italic>Pseudomonas</italic> spp), lo que indica que inoculaciones con <italic>Bacillus</italic>
<italic> subtilis</italic> (B1) y <italic>Saccharomyces </italic>sp aumentan el peso fresco.</p>
<p>Las inoculaciones simples son poco efectivas para aumentar peso fresco de raíz, peso fresco foliar y peso fresco total (Cuadro 5). <xref ref-type="bibr" rid="redalyc_785882496008_ref99">Nakkeeran <italic>et al</italic>. (2021)</xref> explican que el efecto combinado de bacterias y hongos endófiticos, tienden a desarrollar mayor sistema radical en las plantas. <xref ref-type="bibr" rid="redalyc_785882496008_ref75">Acaro y Cevallos, (2025)</xref>, destacan la importancia de las raíces en el soporte de las plántulas y en el transporte de agua y nutrientes desde el suelo hacia la parte aérea.</p>
<p>La asociación de hongos y bacterias endofíticas, tienen efecto directo de manera positiva sobre el crecimiento vegetal de la planta huésped;<xref ref-type="bibr" rid="redalyc_785882496008_ref110"> Sekhar y Thomas, (2015)</xref>; <xref ref-type="bibr" rid="redalyc_785882496008_ref112">Souza <italic>et al</italic>. (2017)</xref> señalan que estas combinaciones modulan el crecimiento vegetal e inducen resistencia al ataque de patógenos, predominando las clases Actinobacteria, α-Proteobacteria, γ-Proteobacteria y Firmicutes, estás ultima corresponde a un filo de bacteria, mayormente Gram positiva con pared celular robusta.</p>
<p>
<table-wrap id="gt6">
<label>Cuadro 5</label>
<caption>
<title>Biomasa por efecto de inoculaciones simples y combinadas de hongos y bacterias endofíticos</title>
</caption>
<alt-text>Cuadro 5 Biomasa por efecto de inoculaciones simples y combinadas de hongos y bacterias endofíticos</alt-text>
<graphic xlink:href="785882496008_gt13.png" position="anchor" orientation="portrait">
<alt-text>Cuadro 5 Biomasa por efecto de inoculaciones simples y combinadas de hongos y bacterias endofíticos</alt-text>
</graphic>
</table-wrap>
</p>
</sec>
</sec>
<sec sec-type="conclusions">
<title>
<bold>CONCLUSIONES</bold>
</title>
<p>La combinación de bacterias y hongos endofíticos inoculados en vitroplantas de plátano, es una alternativa eficaz para la reducción del uso de nematicidas químicos en el manejo del nematodo <italic>Radopholus</italic>
<italic> similis</italic> y como promotores del crecimiento vegetal, al mejorar la altura de planta, el diámetro del pseudotallo y la producción de biomasa; aunque su éxito depende de la compatibilidad de los microorganismos seleccionados.  </p>
</sec>
</body>
<back>
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