<?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>0258-5936</journal-id>
<journal-title><![CDATA[Cultivos Tropicales]]></journal-title>
<abbrev-journal-title><![CDATA[cultrop]]></abbrev-journal-title>
<issn>0258-5936</issn>
<publisher>
<publisher-name><![CDATA[Ediciones INCA]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0258-59362020000400003</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto de productos bioactivos sobre la germinación de granos de polen de teca crioconservados]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of bioactive products on the germination of cryopreserved teak pollen grains]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hine-Gómez]]></surname>
<given-names><![CDATA[Ana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas-Vargas]]></surname>
<given-names><![CDATA[Alejandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Suárez-Guerra]]></surname>
<given-names><![CDATA[Lorenzo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Murillo-Gamboa]]></surname>
<given-names><![CDATA[Olman]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Calvo]]></surname>
<given-names><![CDATA[Laura]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Doctorado en Ciencias Naturales para el Desarrollo (DOCINADE), Instituto Tecnológico de Costa Rica Universidad Estatal a Distancia]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Instituto de Investigación y Servicios Forestales (INISEFOR) ]]></institution>
<addr-line><![CDATA[ Heredia]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Nacional de Ciencias Agrícolas (INCA)  ]]></institution>
<addr-line><![CDATA[San José de las Lajas Mayabeque]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Tecnológico de Costa Rica Escuela de Ingeniería Forestal (ITCR) ]]></institution>
<addr-line><![CDATA[ Cartago]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<volume>41</volume>
<numero>4</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0258-59362020000400003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0258-59362020000400003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0258-59362020000400003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La teca (Tectona grandis L. f.), es un árbol originario del sureste asiático, considerado de gran valor económico principalmente por su madera. Como parte de los esfuerzos por el mejoramiento genético de esta especie, se han desarrollado protocolos para la crioconservación de polen, sin embargo, es indispensable asegurar la viabilidad y germinación eficiente del mismo para futuros cruzamientos de material seleccionado. El objetivo del presente trabajo fue evaluar el efecto de un análogo espirostánico de brasinoesteriode (Biobras-16®) y una mezcla de oligogalacturónidos (Pectimorf®) sobre la germinación in vitro, tamaño del polen y longitud del tubo polínico de polen de teca crioconservado. Los experimentos consistieron en evaluar la germinación de polen a 0, 4 y 8 meses de crioconservación, en medio de cultivo sin suplementos (M1), suplementado con 0,001 y 0,050 mg L-1de Biobras-16® y 5 y 10 mg L-1 de Pectimorf®. Los datos de germinación fueron analizados mediante un Modelo Lineal General, mientras que la longitud del tubo polínico y el área del polen mediante análisis de varianza (ANOVA) y análisis de correlación. Se demostró que ambos productos bioactivos favorecieron la germinación in vitro de los granos de polen crioconservados durante 4 y 8 meses, donde Biobras-16® a 0,001 mg L-1 mostró resultados más consistentes. Pectimorf® estimuló la elongación del tubo polínico, lo cual podría favorecer los procesos de fecundación.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Teak (Tectona grandis L. f.), is a native tree from Southeast Asia considered of great economic value, mainly for its wood. As part of the efforts for the genetic improvement of this specie, protocols for pollen cryopreservation have been developed; however, it is essential to ensure its viability and efficient germination for future crosses of selected material. The objective of the present work was to evaluate the effect of spirostanic analogue of brassinosteroids (Biobras-16®) and a mixture of oligogalacturonides (Pectimorf®) on the in vitro germination, size of pollen and pollen tube length of cryopreserved teak pollen. The experiments consisted of evaluating the germination of pollen with 0, 4 and 8 months of cryopreservation in culture medium without supplements, supplemented with 0.001 and 0.050 Biobras-16® mg L-1 and, Pectimorf® 5 and 10 mg L-1. Germination data were analyzed using a General Linear Model, while pollen tube length and pollen area using analysis of variance (ANOVA) and correlation analysis. It was demonstrated that both bioactive products promote in vitro germination of cryopreserved pollen grains for 4 and 8 months, where Biobras-16® at 0.001 mg L-1 showed results that are more consistent. Pectimorf® stimulated the elongation of the pollen tube, which could favor the fecundation processes.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[brasinoesteroides]]></kwd>
<kwd lng="es"><![CDATA[forestales]]></kwd>
<kwd lng="es"><![CDATA[oligogalacturónidos]]></kwd>
<kwd lng="es"><![CDATA[Tectona grandis]]></kwd>
<kwd lng="en"><![CDATA[brassinosteroids]]></kwd>
<kwd lng="en"><![CDATA[forestry]]></kwd>
<kwd lng="en"><![CDATA[oligogalacturonides]]></kwd>
<kwd lng="en"><![CDATA[Tectona grandis]]></kwd>
</kwd-group>
</article-meta>
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