<?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>1405-2768</journal-id>
<journal-title><![CDATA[Polibotánica]]></journal-title>
<abbrev-journal-title><![CDATA[Polibotánica]]></abbrev-journal-title>
<issn>1405-2768</issn>
<publisher>
<publisher-name><![CDATA[Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-27682019000200099</article-id>
<article-id pub-id-type="doi">10.18387/polibotanica.48.8</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Germinación y crecimiento ex vitro e in vitro de cinco especies de cactáceas del género mammillaria]]></article-title>
<article-title xml:lang="en"><![CDATA[Germination and growth ex vitro and in vitro of five species of cacti of the genus mammillaria]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-González]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-De la O]]></surname>
<given-names><![CDATA[J.L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Solís]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Colinas-León]]></surname>
<given-names><![CDATA[M.T.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Chapingo Departamento de Fitotecnia ]]></institution>
<addr-line><![CDATA[Chapingo Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Chapingo Departamento de Fitotecnia ]]></institution>
<addr-line><![CDATA[Chapingo Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma Chapingo Departamento de Fitotecnia ]]></institution>
<addr-line><![CDATA[Chapingo Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma Chapingo Departamento de Fitotecnia ]]></institution>
<addr-line><![CDATA[Chapingo Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<numero>48</numero>
<fpage>99</fpage>
<lpage>110</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-27682019000200099&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-27682019000200099&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-27682019000200099&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN: Se comparó la germinación y ritmo de crecimiento (RGR) de M. albilanata, M. bocasana, M. columbiana, M. rhodantha y M. spinosissima bajo condiciones ex vitro e in vitro. En el primer caso se evaluaron los porcentajes de germinación (PG), velocidad de germinación (VG) y germinación media (G50). En el segundo, se determinó el RGR luego de 40 semanas de cultivo. El tratamiento in vitro consistió de medio Murashigue-Skoog (MS) al 25% para germinación, y MS al 50% con dosis de sacarosa (3, 6 y 9%) para crecimiento, mientras que el tratamiento ex vitro fue a partir de una mezcla de tierra de hoja y tezontle (1:1). El análisis de varianza y las pruebas de Tukey evidenciaron diferencias significativas entre las respuestas generadas a nivel de tratamientos y especies (p &lt; 0.05), obteniéndose mejores resultados en el tratamiento in vitro. Por otro lado, la suplementación de sacarosa al 6% y 9% generó un mayor ritmo de crecimiento en la parte aérea, mientras que en la de 3% se presentó un ritmo de crecimiento mayor en raíces, en ambos casos superiores al tratamiento ex vitro. La tasa de sobrevivencia de plantas obtenidas en ambas condiciones fue del 100%.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT: The germination and growth rate (RGR) of M. albilanata, M. bocasana, M. columbiana, M. rhodantha and M. spinosissima were compared under ex vitro and in vitro conditions. In the first case, the germination percentages (PG), germination speed (VG) and medium germination (G50) were evaluated. In the second, the RGR was determined after 40 weeks of culture. The in vitro treatment consisted of 25% Murashigue-Skoog (MS) medium for germination, and 50% MS with sucrose dose (3, 6 and 9%) for growth, while the ex vitro treatment was from a mixture of leaf soil and tezontle (1: 1). The analysis of variance and the Tukey tests showed significant differences between the responses generated in the level of treatments and species (p &lt; 0.05), obtaining better results in the in vitro treatment. On the other hand, sucrose supplementation at 6% and 9% generated a higher growth rate in the aerial part, while in the 3% there was a higher growth rate in roots, in both cases superior to the ex vitro treatment. The survival rate of plants obtained in both conditions was 100%.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Mammillaria albilanata]]></kwd>
<kwd lng="es"><![CDATA[Mamillaria bocasana]]></kwd>
<kwd lng="es"><![CDATA[Mamillaria. columbiana]]></kwd>
<kwd lng="es"><![CDATA[Mamillaria rhodantha]]></kwd>
<kwd lng="es"><![CDATA[Mamillaria spinosissima]]></kwd>
<kwd lng="en"><![CDATA[Mammillaria albilanata]]></kwd>
<kwd lng="en"><![CDATA[Mamillaria bocasana]]></kwd>
<kwd lng="en"><![CDATA[Mamillaria columbiana]]></kwd>
<kwd lng="en"><![CDATA[Mamillaria rhodantha]]></kwd>
<kwd lng="en"><![CDATA[Mamillaria spinosissima]]></kwd>
</kwd-group>
</article-meta>
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