<?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>S0187-73802021000200161</article-id>
<article-id pub-id-type="doi">10.35196/rfm.2021.2.161</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Maduración y germinación de embriones somáticos de Coffea arabica cv. Colombia]]></article-title>
<article-title xml:lang="en"><![CDATA[Maturation and germination of somatic embryos of Coffea arabica cv. Colombia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Riviello-Cogco]]></surname>
<given-names><![CDATA[Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Robledo-Paz]]></surname>
<given-names><![CDATA[Alejandrina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez-Espinosa]]></surname>
<given-names><![CDATA[María A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Suárez-Espinosa]]></surname>
<given-names><![CDATA[Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mascorro-Gallardo]]></surname>
<given-names><![CDATA[José Oscar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de Me&#769;xico]]></addr-line>
<country>Me&#769;xico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma Chapingo Departamento de Fitotecnia ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<volume>44</volume>
<numero>2</numero>
<fpage>161</fpage>
<lpage>171</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-73802021000200161&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-73802021000200161&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-73802021000200161&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La variedad de café Colombia (Coffea arabica L.) tiene alta resistencia a la roya y buenas características de producción y calidad de taza. Diversos protocolos para la propagación de café mediante embriogénesis somática han sido desarrollados; sin embargo, la tasa de maduración, germinación y conversión es baja. El objetivo de la presente investigación fue determinar el efecto de reguladores del crecimiento y agentes osmóticos en la maduración y germinación de embriones somáticos de café y evaluar, en condiciones ex vitro, las características fisiológicas de las plantas regeneradas. Para su maduración, embriones globulares y torpedo temprano se cultivaron en un medio Yasuda et al. (1985) con distintas concentraciones de ácido abscísico (ABA) (2-4 mg L-1), ácido salicílico (ASA) (1.38 g L-1), ácido giberélico (AG3) (0.7-1.0 mg L-1), ácido indolacético (AIA) (0.3-0.5 mg L-1), polietilenglicol 8000 (PEG 8000) (50-75 g L-1) o sacarosa (50-80 g L-1). Para su germinación, los embriones maduros fueron transferidos a un medio con 0.25 mg L-1 de AIA y 0.25 mg L-1 de 6-bencilaminopurina (BAP). Las plantas se aclimataron y crecieron en perlita:turba:tezontle (1:1:1) o turba:tezontle (2:1) en condiciones de invernadero. El valor máximo de maduración y germinación de los embriones globulares se observó al adicionar 50 g L-1 de sacarosa al medio (81.7 y 53.9 % respectivamente). Para los embriones torpedo temprano el porcentaje de maduración más alto se registró con 80 g L-1 de sacarosa (19.2 %) o una combinación de 1.0 mg L-1 de AG3 y 0.5 mg L-1 de AIA (45.0 %); sin embargo, los porcentajes de germinación no fueron significativamente distintos del testigo. El potencial osmótico de los embriones no estuvo directamente relacionado con su grado de madurez. La totalidad de las plantas cultivadas en las mezclas de sustratos sobrevivieron y mostraron ser morfológica y fisiológicamente normales bajo condiciones ex vitro.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[SUMMARY The Colombia coffee variety (Coffea arabica L.) has high resistance to rust and good production characteristics and cup quality. Several protocols have been developed for the propagation of coffee by somatic embryogenesis; however, the rate of maturation, germination and conversion is low. The objective of this study was to determine the effect of growth regulators and osmotic agents on the maturation and germination of coffee somatic embryos and to evaluate, under ex vitro conditions, the physiological characteristics of the regenerated plants. For maturation, globular and early torpedo embryos were cultured on a Yasuda et al. (1985) medium with different concentrations of abscisic acid (ABA) (2-4 mg L-1), salicylic acid (SA) (1.38 g L-1), gibberellic acid (AG3) (0.7-1.0 mg L-1), indoleacetic acid (AIA) (0.3-0.5 mg L-1), polyethylene glycol 8000 (PEG 8000) (50-75 g L-1) or sucrose (50-80 g L-1). For germination, the mature embryos were transferred into a medium with 0.25 mg L-1 of IAA and 0.25 mg L-1 of 6-benzylaminopurine (BAP). The plants were acclimatized and grown on perlite:peat:volcanic rock (1:1:1) or peat:volcanic rock (2:1) under greenhouse conditions. The maximum value of maturation and germination of globular embryos was observed when 50 g L-1 of sucrose were added to the medium (81.7 y 53.9 % respectively). For early torpedo embryos, the highest percentage of maturation was recorded with 80 g L-1 of sucrose (19.2 %) or a combination of 1.0 mg L-1 GA3 and 0.5 mg L-1 of IAA (45.0 %):however, the germination percentages were not significantly different from the control. The osmotic potential of the embryos was not directly related to their degree of matu-rity. All the plants grown on the substrate mixtures survived and were morphologically and physiologically normal under ex vitro conditions.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Coffea arabica]]></kwd>
<kwd lng="es"><![CDATA[embriogénesis somática]]></kwd>
<kwd lng="es"><![CDATA[germinación]]></kwd>
<kwd lng="es"><![CDATA[maduración]]></kwd>
<kwd lng="es"><![CDATA[osmóticos]]></kwd>
<kwd lng="es"><![CDATA[reguladores de crecimiento]]></kwd>
<kwd lng="en"><![CDATA[Coffea arabica]]></kwd>
<kwd lng="en"><![CDATA[germination]]></kwd>
<kwd lng="en"><![CDATA[growth regulators]]></kwd>
<kwd lng="en"><![CDATA[maturation]]></kwd>
<kwd lng="en"><![CDATA[osmotic]]></kwd>
<kwd lng="en"><![CDATA[somatic embryogenesis]]></kwd>
</kwd-group>
</article-meta>
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