<?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>0187-7380</journal-id>
<journal-title><![CDATA[Revista fitotecnia mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. fitotec. mex]]></abbrev-journal-title>
<issn>0187-7380</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Fitogenética A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-73802022000300333</article-id>
<article-id pub-id-type="doi">10.35196/rfm.2022.3.333</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Embriogénesis somática en Heliconia collinsiana Griggs]]></article-title>
<article-title xml:lang="en"><![CDATA[Somatic embryogenesis in Heliconia collinsiana Griggs]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Meneses]]></surname>
<given-names><![CDATA[Eleodoro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Peralta]]></surname>
<given-names><![CDATA[María Cristina G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Estrada-Luna]]></surname>
<given-names><![CDATA[Andrés A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valdovinos-Ponce]]></surname>
<given-names><![CDATA[Guadalupe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados Postgrado en Recursos Genéticos y Productividad ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Colegio de Postgraduados PREGEP-Genética ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Politécnico Nacional Centro de Investigación y de Estudios Avanzados Departamento de Ingeniería Genética]]></institution>
<addr-line><![CDATA[Irapuato Guanajuato]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Colegio de Postgraduados Postgrado en Fitosanidad-Fitopatología ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2022</year>
</pub-date>
<volume>45</volume>
<numero>3</numero>
<fpage>333</fpage>
<lpage>340</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-73802022000300333&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-73802022000300333&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-73802022000300333&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Las heliconias son plantas ornamentales tropicales apreciadas por sus inflorescencias de formas exóticas y colores brillantes. Su cultivo requiere sistemas de propagación como la embriogénesis somática, que permitan clonar genotipos élite y generar suficiente material vegetativo de calidad fitosanitaria certificada. El objetivo de esta investigación fue establecer un protocolo de embriogénesis somática para Heliconia collinsiana y caracterizar histológicamente el origen de los embriones. Secciones transversales de la base de pseudotallos de plantas regeneradas in vitro se establecieron en el medio de Murashige y Skoog (MS) con distintas concentraciones de ácido 2,4-diclofenoxiacético (2,4-D) para inducir la formación de callos. En las etapas de maduración y germinación de los embriones se evaluó el efecto de benciladenina (BA), ácido abscísico (ABA), y en la conversión a plantas, se evaluó la concentración de sales MS. La formación de callos ocurrió en oscuridad con 18 mg L-1 de 2,4-D y 0.5 g L-1 de carbón activado. La multiplicación de callos se obtuvo con 1 o 2 mg L-1 de 2,4-D y 16 h luz. La maduración y germinación de los embriones somáticos se observó con 0.5 mg L-1 de BA, y la conversión y crecimiento de las plantas se logró con la mitad de concentración de sales del medio MS. Los embriones se originaron de masas proembriogénicas conformadas por células pequeñas, isodiamétricas, con núcleos prominentes y citoplasma denso. En la etapa de aclimatación, 95 % de las plantas sobrevivieron en condiciones de invernadero. Este es el primer protocolo de embriogénesis somática novedoso para la multiplicación clonal de esta especie ornamental y establece las bases para futuros estudios en otras especies nativas, cultivares comerciales o híbridos derivados de mejoramiento genético.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary Heliconias are ornamental tropical plants highly appreciated for their inflorescences with exotic shapes and bright colors. Its cultivation requires propagation systems such as somatic embryogenesis that allow the cloning of elite genotypes for generation of sufficient vegetative material of certified phytosanitary quality. The objective of this research was to establish a somatic embryogenesis protocol for Heliconia collinsiana and histologically characterizing the origin of the embryos. Cross-sections from the base of pseudostems of in vitro plants regenerated were established in Murashige and Skoog (MS) medium with different concentrations of 2,4-diclophenoxyacetic acid (2,4-D) to induce callus formation. The effect of benzyladenine (BA) and abscisic acid (ABA) was evaluated at maturation and germination stages of embryos, and the concentration of MS salts was evaluated at the time of conversion to plants. Callus formation occurred in the dark with 18 mg L-1 of 2,4-D and 0.5 g L-1 of activated charcoal. Callus multiplication was obtained with 1 or 2 mg L-1 of 2,4-D and 16 h light. Maturation and germination of the somatic embryos was observed with 0.5 mg L-1 of BA and conversion and growth of the plants was achieved with half the salts concentration in the MS medium. Embryos originated from proembryogenic masses composed of small, isodiametric cells with prominent nuclei and dense cytoplasm. At the acclimatization stage, 95 % of the plants survived under greenhouse conditions. This is the first novel somatic embryogenesis protocol for clonal multiplication of this ornamental species and establishes the base for future studies in other native species, commercial cultivars or hybrids derived from genetic improvement.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[2,4-D]]></kwd>
<kwd lng="es"><![CDATA[callogénesis]]></kwd>
<kwd lng="es"><![CDATA[capa fina de células]]></kwd>
<kwd lng="es"><![CDATA[micropropagación]]></kwd>
<kwd lng="es"><![CDATA[morfogénesis]]></kwd>
<kwd lng="en"><![CDATA[2,4-D]]></kwd>
<kwd lng="en"><![CDATA[callogenesis]]></kwd>
<kwd lng="en"><![CDATA[micropropagation]]></kwd>
<kwd lng="en"><![CDATA[morphogenesis]]></kwd>
<kwd lng="en"><![CDATA[thin cell layer]]></kwd>
</kwd-group>
</article-meta>
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