<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0379-3982</journal-id>
<journal-title><![CDATA[Revista Tecnología en Marcha]]></journal-title>
<abbrev-journal-title><![CDATA[Tecnología en Marcha]]></abbrev-journal-title>
<issn>0379-3982</issn>
<publisher>
<publisher-name><![CDATA[Instituto Tecnológico de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0379-39822016000700057</article-id>
<article-id pub-id-type="doi">10.18845/tm.v29i7.2706</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Actividad antagonista de Gliocladium sp. contra Sclerotium cepivorum]]></article-title>
<article-title xml:lang="en"><![CDATA[Antagonist activity of Gliocladium sp. against Sclerotium cepivorum]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castillo]]></surname>
<given-names><![CDATA[Humberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas]]></surname>
<given-names><![CDATA[Randall]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villalta]]></surname>
<given-names><![CDATA[Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Tecnológico de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Tecnológico de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Tecnológico de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2016</year>
</pub-date>
<volume>29</volume>
<fpage>57</fpage>
<lpage>64</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0379-39822016000700057&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0379-39822016000700057&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0379-39822016000700057&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Algunos géneros fúngicos han sido utilizados para el control de agentes causantes de enfermedades en plantas, por lo que su actividad representa una alternativa para la disminución e incluso la sustitución de químicos sintéticos. Existen hongos antagonistas ampliamente estudiados, como Trichoderma sp., que concurre con otros hongos que poseen un alto potencial como agentes biocontroladores, entre ellos se destaca Gliocladium sp. En este estudio se pretende establecer la capacidad antagonista que tiene Gliocladium contra el patógeno causante de la pudrición blanca de la cebolla, Sclerotium cepivorum. Se logró aislar Gliocladium sp. a partir de una muestra de suelo dedicada al cultivo de cebolla (Allium cepa L.), se subcultivó hasta obtener un cultivo axénico y se realizaron cultivos duales en placas con el hongo y el patógeno. Se determinó que el porcentaje de inhibición del crecimiento radial (PICR) promedio obtenido a los ocho días de exposición (53,66%) no presentaba diferencias significativas (p=0,19) con el obtenido a los 15 días (54,20%) y, dadas las características de inhibición, se presume que el mecanismo de control presentado por la cepa de Gliocladium sp. utilizada responde a la producción de enzimas, metabolitos y posiblemente una mezcla de compuestos orgánicos volátiles capaces de inhibir el crecimiento y desarrollo de S. cepivorum aun sin que sus hifas entren en contacto.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abtract Some fungal genus have been used in controlling disease-causing agents in plants, so their activity represents an alternative to reduce and even replace some synthetic chemicals. There are many studies about antagonistic Fungi, such as Trichoderma spp., which concurs with other Fungi that have high potential as biocontrol agents, like the genus Gliocladium. In this study, it is intended to establish the antagonistic ability of this one against the pathogen causing white rot in onions Sclerotium cepivorum. It was possible to isolate Gliocladium sp. from a soil sample, which was subcultured until obtain an axenic culture and then, dual cultures were performed on plates with the fungus and the pathogen. The average IPRG obtained at 8 days of exposure (53.66%) showed no significant difference (p= 0,19) to the one obtained at 15 days (54.20%). It was presumed that the control mechanism presented by the strain of Gliocladium sp. used, responds to the production of enzymes, metabolites and possibly a mixture of volatile organic compounds capable of inhibit the growth and development of Sclerotium even if their hyphae don&#8217;t come into contact.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Aislamiento]]></kwd>
<kwd lng="es"><![CDATA[biocontrolador]]></kwd>
<kwd lng="es"><![CDATA[inhibición del crecimiento radial]]></kwd>
<kwd lng="es"><![CDATA[metabolitos secundarios]]></kwd>
<kwd lng="en"><![CDATA[Isolation]]></kwd>
<kwd lng="en"><![CDATA[biocontrol]]></kwd>
<kwd lng="en"><![CDATA[inhibition of radial growth]]></kwd>
<kwd lng="en"><![CDATA[secondary metabolites]]></kwd>
</kwd-group>
</article-meta>
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