<?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>0187-7151</journal-id>
<journal-title><![CDATA[Acta botánica mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Act. Bot. Mex]]></abbrev-journal-title>
<issn>0187-7151</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Ecología A.C., Centro Regional del Bajío]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-71512017000200069</article-id>
<article-id pub-id-type="doi">10.21829/abm119.2017.1232</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Tricomas foliares en Senecio sección Mulgediifolii (Senecioneae, Asteraceae)]]></article-title>
<article-title xml:lang="en"><![CDATA[Leaf trichomes in Senecio section Mulgediifolii (Senecioneae, Asteraceae)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas-Leal]]></surname>
<given-names><![CDATA[Alicia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villaseñor]]></surname>
<given-names><![CDATA[José Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Terrazas]]></surname>
<given-names><![CDATA[Teresa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Biología Departamento de Botánica]]></institution>
<addr-line><![CDATA[ Cd. Mx.]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<numero>119</numero>
<fpage>69</fpage>
<lpage>78</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-71512017000200069&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-71512017000200069&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-71512017000200069&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes y Objetivos: Se realizó un estudio del complemento de tricomas en las hojas de Senecio sección Mulgediifolii utilizando microscopía de luz y microscopía electrónica de barrido, con el propósito de determinar caracteres que faciliten la identificación de sus especies.  Métodos: Se estudió el tercio medio de la lámina de hojas recolectadas en campo o tomadas de ejemplares de herbario. El material proveniente de herbario se hidrató en agua hirviendo y se aclaró con hidrato de cloral por varios días; el material recolectado en campo se fijó con FAA y posteriormente se conservó en alcohol etílico a 70%. Con ambos tipos de materiales se hicieron cortes transversales a mano alzada y se montaron en gelatina glicerinada. El material observado en el microscopio electrónico de barrido fue deshidratado, se llevó a punto crítico y se cubrió con polvo de oro.  Resultados clave: Todas las especies de la sección presentan tricomas multicelulares uniseriados, los cuales pueden ser glandulares o no glandulares. Se identificaron seis tipos básicos de tricomas y dos subtipos, los cuales variaron de acuerdo con su posición en la lámina, con diferencias tanto en ornamentación como en depósitos de cera. Dos tipos de tricomas y una variante fueron distintivos de algunas especies; por ejemplo, la variante 2a1 es característica de Senecio jacalensis y está presente en ambas superficies foliares, el tricoma 3d se encuentra solamente en la vena media de la superficie abaxial de S. polypodioides y el tricoma 4a solamente se localiza en el margen foliar de S. roseus.  Conclusiones: La combinación de caracteres, como los tipos de tricomas, su ornamentación y la presencia de cera, pueden ser útiles para diferenciar las especies de Senecio sección Mulgediifolii.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Background and Aims: A study of trichome complements in Senecio section Mulgediifolii using light and scanning electron microscopy was carried out, with the aim of distinguishing characters that contribute to identify their species.  Methods: The middle section of the leaf lamina was collected in the field or taken from herbarium specimens. The material from herbaria was hydrated with boiling water and cleared with chloral hydrate for several days; field collected material was fixed in FAA and later preserved in 70% ethanol. Transversal sections of leaves were mounted in glycerin-jelly. For scanning electron microscopy, leaf sections were dehydrated, critical point dried and covered with a gold lamina.  Key results: All species contain multicellular uniseriate trichomes which may be glandular or non-glandular. Six basic types of trichomes and two subtypes were identified, which varied according to their position on the leaf; in addition, they show differences in ornamentation and wax deposition. Two types of trichomes and a variant were distinctive of some species; for example, variant 2a1 is characteristic of Senecio jacalensis and occurs in both leaf surfaces, in S. polypodioides type 3d trichomes are present only along the midrib on the abaxial surface, and type 4a trichomes are located only on the leaf margins of S. roseus.  Conclusions: The combination of characters like trichome type, ornamentation and wax deposition may be useful for recognizing the species of Senecio section Mulgediifolii.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[complemento de tricomas]]></kwd>
<kwd lng="es"><![CDATA[depósito de cera]]></kwd>
<kwd lng="es"><![CDATA[indumento]]></kwd>
<kwd lng="es"><![CDATA[ornamentación foliar]]></kwd>
<kwd lng="en"><![CDATA[indument]]></kwd>
<kwd lng="en"><![CDATA[leaf ornamentation]]></kwd>
<kwd lng="en"><![CDATA[trichome complement]]></kwd>
<kwd lng="en"><![CDATA[wax deposits]]></kwd>
</kwd-group>
</article-meta>
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