<?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>S2007-42982021000100080</article-id>
<article-id pub-id-type="doi">10.17129/botsci.2651</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Autonomous pollination alleviates pollen limitation in the endemic Cienfuegosia yucatanensis Millsp. (Malvaceae)]]></article-title>
<article-title xml:lang="es"><![CDATA[La polinización autónoma alivia la limitación por polen en la especie endémica Cienfuegosia yucatanensis Millsp. (Malvaceae)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Parra-Tabla]]></surname>
<given-names><![CDATA[Víctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alonso]]></surname>
<given-names><![CDATA[Conchita]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Yucatán Campus de Ciencias Biológicas y Agropecuarias Departamento de Ecología Tropical]]></institution>
<addr-line><![CDATA[Mérida Yucatán]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Estación Biológica de Doñana  ]]></institution>
<addr-line><![CDATA[Sevilla ]]></addr-line>
<country>Spain</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<volume>99</volume>
<numero>1</numero>
<fpage>80</fpage>
<lpage>91</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-42982021000100080&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-42982021000100080&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-42982021000100080&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: Self-compatibility is common on endemic plant species, but pollen limitation and self-pollination could be risk factors.  Study species: The endemic Cienfuegosia yucatanensis (Malvaceae), whose distribution is mainly restricted to the north coast of the peninsula of Yucatán, México.  Questions:  a) Are flowers of C. yucatanensis autonomous for pollination? b) Are C. yucatanensis fruit or seed-set limited by pollen deposition? and, c) Is there evidence of early inbreeding depression in C. yucatanensis?  Study sites and dates: Two sites in the north of the peninsula of Yucatán in a seasonally dry scrubland, in the rainy season of 2013 and 2014.  Methods: Number of flowers and fruits were weekly recorded. Flowers were collected to count the number of conspecific pollen load and the number of pollen tubes. Autonomous pollination and pollen limitation were evaluated with a hand-pollination experiment. Inbreeding depression on fruit and seed production, and seed weight was evaluated.  Results: Flower and fruit production occur simultaneously and last from August to October. Conspecific pollen deposition on stigmas occurred through the whole flowering season and a maximum of pollen tubes was observed in August. Autonomous pollination treatment lead to similar fruit and seed production than cross-pollination, but open pollination produced significantly more seeds. No significant differences among self- and cross-pollination treatments on fruit and seed production or seed weight, were found.  Conclusions: Our results suggest that self-compatibility combined with a relatively efficient autonomous pollination, are suitable mechanisms for the reproductive assurance in C. yucatanensis, with no apparent effects of early inbreeding depression.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes: La autocompatibilidad es común en especies endémicas, pero la limitación por polen y la autopolinización son factores de riesgo.  Especie de estudio: Cienfuegosia yucatanensis (Malvaceae), especie endémica cuya distribución principal se restringe a la costa norte de Yucatán, México.  Preguntas:  a) ¿C. yucatanensis presenta autopolinización autónoma? b) ¿Existe limitación por polen en C. yucatanensis? y c) ¿Existe depresión por endogamia temprana en C. yucatanensis?  Sitios de estudio y fechas:  Dos sitios ubicados en el norte de la península de Yucatán, en la temporada de lluvias de los años 2013 y 2014.  Métodos: Se contabilizó la producción de flores y frutos, y el número de granos de polen conespecífico y de tubos polínicos. La polinización autónoma y la limitación por polen fueron evaluadas con experimentos de polinización manual. La depresión por endogamia se estimó en la producción de frutos y semillas, y en el peso de las semillas.  Resultados: La producción de flores y frutos abarcó de agosto a octubre. La deposición de polen y el número de tubos polínicos máximo se observó durante agosto. La polinización autónoma produjo frutos y semillas, pero la polinización abierta produjo significativamente más semillas por fruto. No hubo diferencias significativas en la producción de frutos y semillas, ni en el peso de las semillas, entre los tratamientos de autopolinización y polinización cruzada.  Conclusiones:  La autocompatibilidad, combinada con una eficiente polinización autónoma, son buenos mecanismos para el aseguramiento reproductivo de C. yucatanensis sin efectos de depresión por endogamia temprana.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Endemism]]></kwd>
<kwd lng="en"><![CDATA[mixed mating systems]]></kwd>
<kwd lng="en"><![CDATA[self-compatibility]]></kwd>
<kwd lng="en"><![CDATA[Yucatán]]></kwd>
<kwd lng="es"><![CDATA[auto-compatibilidad]]></kwd>
<kwd lng="es"><![CDATA[endemismo]]></kwd>
<kwd lng="es"><![CDATA[sistemas de cruza mixto]]></kwd>
<kwd lng="es"><![CDATA[Yucatán]]></kwd>
</kwd-group>
</article-meta>
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