<?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>S1405-27682019000200065</article-id>
<article-id pub-id-type="doi">10.18387/polibotanica.48.6</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Descripción del desarrollo morfogénico de los prótalos y esporófitos jovenes de Pteris quadriaurita retz. (Pteridaceae-polypodiidae) en tres soportes naturales]]></article-title>
<article-title xml:lang="en"><![CDATA[Morphogenic description of the development of the prothalus and the young sporophyte from Pteris quadriaurita retz. (pteridaceae-polypodiidae) in three natural substrates]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ballesteros-Montiel]]></surname>
<given-names><![CDATA[B.J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arreguín-Sánchez]]></surname>
<given-names><![CDATA[M.L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernández-Nava]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quiroz-García]]></surname>
<given-names><![CDATA[D.L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Nacional de Ciencias Biológicas Departamento de Botánica]]></institution>
<addr-line><![CDATA[DF ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Nacional de Ciencias Biológicas Departamento de Botánica]]></institution>
<addr-line><![CDATA[DF ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Nacional de Ciencias Biológicas Departamento de Botánica]]></institution>
<addr-line><![CDATA[DF ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Nacional de Ciencias Biológicas Departamento de Botánica]]></institution>
<addr-line><![CDATA[DF ]]></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>65</fpage>
<lpage>86</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-27682019000200065&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-27682019000200065&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-27682019000200065&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN: Se describe el desarrollo del prótalo y del esporófito joven de Pteris quadriaurita Retz. Los especímenes fueron recolectados en un bosque mesófilo de montaña en Tototla, municipio de Xochicoatlán, estado de Hidalgo, México. Las esporas fueron sembradas en frascos de vidrio de 125 ml con cerámica (barro molido), piedra de río, tela de mosquitero y tres soportes de cultivo (tierra, maquique y musgo), todo previamente esterilizado y cerrado con plástico y alambre de cobre. El ciclo fue isospórico con desarrollo del prótalo tipo Ceratopteris. Los gametófitos fueron unisexuados masculinos, unisexuados femeninos y pocos bisexuados. Los esporófitos apogámicos se obtuvieron a los 231 días en musgo y maquique, mientras que en tierra de hoja no se formaron.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT: The development of the prothalus and the young sporophyte of Pteris quadriaurita Retz. are described. Studied material was collected in a cloud forest in Tototla, Xochicoatlán municipality, State of Hidalgo, México. The spores were sown in glass vessel of 125 ml prepared in the following manner: the glasses were layered with ceramic, river stone, mosquito net and three natural substrates (plant litter, maquique and moss) all previously sterilized and enclosed in plastic bag tied with copper wire. The cycle proved to be isosporeus with prothallial development corresponding to the Ceratopteris type. The gametophytes were only male, only female and few hermaphrodites. Young sporophytes were apogamous obtained around 231 days after sowing in moss and maquique, in plant litter, they were nor development.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[apogamia]]></kwd>
<kwd lng="es"><![CDATA[gametófitos]]></kwd>
<kwd lng="es"><![CDATA[esporófitos]]></kwd>
<kwd lng="es"><![CDATA[sustratos naturales]]></kwd>
<kwd lng="es"><![CDATA[Pteris]]></kwd>
<kwd lng="en"><![CDATA[apogamy]]></kwd>
<kwd lng="en"><![CDATA[gametophytes]]></kwd>
<kwd lng="en"><![CDATA[sporophytes]]></kwd>
<kwd lng="en"><![CDATA[natural substrates]]></kwd>
<kwd lng="en"><![CDATA[Pteris]]></kwd>
</kwd-group>
</article-meta>
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