<?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>S2007-42982019000100065</article-id>
<article-id pub-id-type="doi">10.17129/botsci.2041</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Morphological differences of Turnera diffusa (Turneraceae) in two populations differing in rainfall at Northeastern Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Diferencias morfológicas de Turnera diffusa (Turneraceae) en dos poblaciones del noreste de México con diferente precipitación]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Urbizu-González]]></surname>
<given-names><![CDATA[Ana Lucía]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores]]></surname>
<given-names><![CDATA[Joel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rosa-Manzano]]></surname>
<given-names><![CDATA[Edilia de la]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castillo-Ruíz]]></surname>
<given-names><![CDATA[Octelina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Tamaulipas Instituto de Ecología Aplicada ]]></institution>
<addr-line><![CDATA[Ciudad Victoria Tamaulipas]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,IPICYT División de Ciencias Ambientales ]]></institution>
<addr-line><![CDATA[San Luis Potosí S.L.P.]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma de Tamaulipas U.A.M. Reynosa Aztlán ]]></institution>
<addr-line><![CDATA[ Tamaulipas]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2019</year>
</pub-date>
<volume>97</volume>
<numero>1</numero>
<fpage>65</fpage>
<lpage>73</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-42982019000100065&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-42982019000100065&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-42982019000100065&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Background:  Plant morphology is the expression of a set of characteristics in response to environmental conditions and therefore to the availability of resources.  Questions:  Are the populations of Turnera diffusa morphologically different due to climatic factors?  Species studied: Turnera diffusa Willd. ex Schult, known as &#8220;damiana&#8221;.  Study site and dates:  Jaumave and Güémez in Tamaulipas, Mexico; during October 2013 and April 2014.  Methods:  Abiotic characteristics of study sites and morphological traits of the plants were evaluated, as well as the exposure of the plants to light, and the flowering; 15 random transects of 100 m2 each were made in each site. A multivariate analysis with linear discriminant functions was applied to determine possible differences between the two populations considering the morphological variables.  Results:  The population of T. diffusa of Güémez did present higher branch density and bigger leaves than those of Jaumave, which can be related to the greater precipitation that is received in that locality in comparison with Jaumave. Turnera diffusa plants with higher height were found under natural shade conditions and flowering is a condition that seems to be unrelated to the exposure.  Conclusions:  Populations of Turnera diffusa of Jaumave and Güémez were morphologically different.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes:  La morfología vegetal es la expresión de un grupo de características en respuesta a condiciones ambientales y, por lo tanto, a la disponibilidad de recursos.  Pregunta:  ¿Son las poblaciones de Turnera diffusa morfológicamente diferentes debido a factores climáticos?  Especie de estudio: Turnera diffusa Willd. ex Schult, conocida como &#8220;damiana&#8221;.  Sitio de estudio y fechas:  Jaumave y Güémez en Tamaulipas, México; durante octubre de 2013 y abril de 2014.  Métodos:  Se evaluaron las características abióticas de los sitios de estudio, las características morfológicas de las plantas, la floración y la exposición de las plantas a la luz. Se realizaron al azar 15 transectos de 100 m2 cada uno en cada sitio. Se aplicó un análisis multivariado con funciones lineales discriminantes para determinar las posibles diferencias entre las dos poblaciones considerando las variables mofológicas.  Resultados:  La población de T. diffusa de Güémez presentó mayor densidad de ramas y hojas más grandes que la de Jaumave, lo cual puede estar relacionado con la mayor precipitación de Güémez en comparación con Jaumave. Las plantas de T. diffusa con mayor altura se encontraron bajo condiciones de sombra natural y la floración no parece estar relacionada con la exposición.  Conclusiones:  Las poblaciones de T. diffusa de Jaumave y Güémez fueron morfológicamente distintas.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Branch density]]></kwd>
<kwd lng="en"><![CDATA[climatic factors]]></kwd>
<kwd lng="en"><![CDATA[damiana]]></kwd>
<kwd lng="en"><![CDATA[semi-arid regions]]></kwd>
<kwd lng="es"><![CDATA[Densidad de ramas]]></kwd>
<kwd lng="es"><![CDATA[factores climáticos]]></kwd>
<kwd lng="es"><![CDATA[damiana]]></kwd>
<kwd lng="es"><![CDATA[regiones semiáridas]]></kwd>
</kwd-group>
</article-meta>
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