<?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>2007-4298</journal-id>
<journal-title><![CDATA[Botanical Sciences]]></journal-title>
<abbrev-journal-title><![CDATA[Bot. sci]]></abbrev-journal-title>
<issn>2007-4298</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Botánica de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-42982017000300423</article-id>
<article-id pub-id-type="doi">10.17129/botsci.1022</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Pollination biology of Agave horrida (Agavaceae) in the Chichinautzin mountain range, Central Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores-Torres]]></surname>
<given-names><![CDATA[Arnoldo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Galindo-Escamilla]]></surname>
<given-names><![CDATA[Andrea]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Rice University  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>USA</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2017</year>
</pub-date>
<volume>95</volume>
<numero>3</numero>
<fpage>423</fpage>
<lpage>431</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-42982017000300423&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-42982017000300423&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-42982017000300423&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Background:  the predictability of nectarivorous bats and their greater fecundity efficiency promote specialized pollination systems in columnar cactus in central Mexico. Some authors have suggested the same pollination pattern for Agave genus, and even when recent meta-analysis does not find such pattern, they have suggested this could be due to the lack of descriptive studies of pollination for this genus.  Hypothesis:  according to the chiropterophily syndrome of its flowers, the most efficient pollinator of Agave horrida will be nectarivorous bats leading to a pollination system with a specialist tendency in this agave species.  Studied species: Agave horrida and floral visitors.  Study site and years of study:  lava field of the Chichinautzin mountain range, in Morelos State in Central Mexico in 2005.  Methods:  we studied the floral biology of A. horrida, its floral offer (density of flowers in a given area), visitor rate, and visitor abundance, and conducted exclusion experiments for diurnal and nocturnal visitors.  Results: A. horrida has protandric flowers with chiropterophilous characteristics (larger nectar production at night and nocturnal anther dehiscence and stigma receptivity). Nectarivorous bats were the most frequent flower visitors and the guild that most frequently presented pollen on their bodies. Pollinator exclusion experiments show that both birds and bats can successfully pollinate A. horrida. Nevertheless, the predictability and abundance of the nectarivorous bat Leptonycteris nivalis, along with the greater fruit and seed production than birds, makes it the most efficient pollinator.  Conclusions:  our results support the hypothesis of a specialized pollination system towards nectarivorous bats in agaves in central Mexico.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes: la predictibilidad de murciélagos nectarívoros y su mayor eficiencia en la fecundación de las flores promueven sistemas de polinización especialistas en los cactus columnares del centro de México. Aunque algunos autores han sugerido el mismo patrón en la polinización del género Agave, resultados de meta-análisis recientes no encuentran dicho patrón, sugiriendo que esto se debe a los pocos estudios disponibles sobre polinización de agaves.  Hipótesis:  de acuerdo al síndrome quiropterófilo de sus flores, el polinizador más eficiente de Agave horrida serían los murciélagos nectarívoros; lo anterior conduciría a un sistema de polinización quiropterófilo en A. horrida.  Especies de estudio: Agave horrida y sus visitantes florales.  Sitio y años de estudio:  Pedregal de la sierra del Chichinautzin, México, en el año 2005.  Métodos:  estudiamos la biología floral de A. horrida, la tasa de visita y la abundancia de visitantes florales y realizamos experimentos de exclusión de polinizadores.  Resultados: A. horrida tiene flores quiropterófilas (producción de néctar, dehiscencia de las anteras y receptividad nocturnas). Los murciélagos nectarívoros son los visitantes florales más abundantes y el gremio que más frecuentemente presenta polen en su cuerpo. Los experimentos de exclusión muestran que aves y murciélagos polinizan a A. horrida. Sin embargo, la predictibilidad y abundancia del murciélago nectarívoro Leptonycteris nivalis, aunado a su mayor producción de frutos y semillas en comparación con las aves lo convierten en el polinizador mas eficiente.  Conclusiones:  nuestros resultados refuerzan la hipótesis de un sistema de polinización especialista a murciélagos nectarívoros en agaves del centro de México.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Agave horrida]]></kwd>
<kwd lng="en"><![CDATA[Leptonycteris nivalis]]></kwd>
<kwd lng="en"><![CDATA[pollination biology]]></kwd>
<kwd lng="en"><![CDATA[Chichinautzin mountain range]]></kwd>
<kwd lng="es"><![CDATA[Agave horrida]]></kwd>
<kwd lng="es"><![CDATA[Leptonycteris nivalis]]></kwd>
<kwd lng="es"><![CDATA[Biología de la polinización]]></kwd>
<kwd lng="es"><![CDATA[Sierra del Chichinautzin]]></kwd>
</kwd-group>
</article-meta>
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