<?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>1870-3453</journal-id>
<journal-title><![CDATA[Revista mexicana de biodiversidad]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Biodiv.]]></abbrev-journal-title>
<issn>1870-3453</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Biología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-34532017000400899</article-id>
<article-id pub-id-type="doi">10.1016/j.rmb.2017.10.019</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Anatomía comparativa de raíz, tallo, hoja y base del pedúnculo de Manfreda (Asparagaceae: Agavoideae)]]></article-title>
<article-title xml:lang="en"><![CDATA[Comparative anatomy of the stem, leaf, and inflorescence basal axis of Manfreda (Asparagaceae: Agavoideae)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Solano]]></surname>
<given-names><![CDATA[Eloy]]></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 contrib-type="author">
<name>
<surname><![CDATA[Reyes-Rivera]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Serrano-Casas]]></surname>
<given-names><![CDATA[Héctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Estudios Superiores Zaragoza ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Biología ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></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>
<volume>88</volume>
<numero>4</numero>
<fpage>899</fpage>
<lpage>911</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-34532017000400899&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-34532017000400899&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-34532017000400899&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Se estudió comparativamente la anatomía vegetativa de 13 especies de Manfreda. Las muestras recolectadas en el campo fueron procesadas con la técnica de inclusión en parafina. Todas las especies presentan raíces contráctiles y fibrosas, algunas con células internas lignificadas formando una banda de 1-5 estratos. Manfreda nanchititlensis se caracteriza por tener células endodérmicas engrosadas. El cormo presenta un meristemo secundario de engrosamiento y algunas especies tienen cuerpos de sílice en el parénquima de este órgano. Este rasgo es raro en el cormo de las monocotiledóneas y es el segundo registro de cuerpos de sílice en el cormo de las Asparagales. El bulbo presenta un meristemo primario de engrosamiento cerca de la base de las hojas. La base del pedúnculo tiene una banda de esclerénquima, rafidios y estiloides presentes o ausentes en el parénquima. Las láminas foliares se caracterizan por tener estomas paracíticos, son unifaciales con parénquima esponjoso. Tricomas y una peridermis continua en la superficie abaxial distinguen a Manfreda pubescens; este tejido también se presenta en Manfreda maculata pero de forma discontinua. Una vaina de parénquima con escasos estiloides rodea los haces vasculares de Manfreda pringlei. Las características anatómicas descritas en combinación con otras evidencias contribuyen a la sistemática del género Manfreda.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The vegetative anatomy of 13 species of Manfreda was studied. The samples collected in the field were prepared by the paraffin embedding technique. All species have contractile and fibrous roots, some of them having a band of 1-5 strata of lignified internal cells. Manfreda nanchititlensis has a thick-walled endodermis. The corm has a secondary thickening meristem and some species possess silica bodies in the parenchyma of this organ. This trait is rare in the corms of monocots and it is the second record of silica bodies in the corms in Asparagales. The bulb has a primary thickening meristem near the base of the leaves. The base of the peduncle has a band of sclerenchyma and raphides and styloids present or absent in the parenchyma. The leaf blades have paracitic stomata, they are unifacial with spongy parenchyma. Trichomes and a continuous abaxial periderm distinguish Manfreda pubescens, whereas a discontinuous periderm is distinctive of Manfreda maculata. A parenchyma bundle sheath with few styloids distinguishes Manfreda pringlei. The anatomical features described in combination with other evidence contribute to the systematics of Manfreda.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Cuerpos de sílice]]></kwd>
<kwd lng="es"><![CDATA[Estiloides]]></kwd>
<kwd lng="es"><![CDATA[Meristemo de engrosamiento secundario]]></kwd>
<kwd lng="es"><![CDATA[Raíz contráctil]]></kwd>
<kwd lng="en"><![CDATA[Silica bodies]]></kwd>
<kwd lng="en"><![CDATA[Styloids]]></kwd>
<kwd lng="en"><![CDATA[Secondary thickening meristem]]></kwd>
<kwd lng="en"><![CDATA[Contractile root]]></kwd>
</kwd-group>
</article-meta>
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