<?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>S2007-42982019000200218</article-id>
<article-id pub-id-type="doi">10.17129/botsci.2028</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Leaf morpho-anatomical diversity in Echeveria aff. gigantea (Crassulaceae)]]></article-title>
<article-title xml:lang="es"><![CDATA[Diversidad de la morfoanatomía foliar en Echeveria aff. gigantea (Crassulaceae)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sandoval-Zapotitla]]></surname>
<given-names><![CDATA[Estela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Quezada]]></surname>
<given-names><![CDATA[Daniel M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes-Santiago]]></surname>
<given-names><![CDATA[Jerónimo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Islas-Luna]]></surname>
<given-names><![CDATA[María de los Ángeles]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rosas]]></surname>
<given-names><![CDATA[Ulises]]></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 Jardín Botánico]]></institution>
<addr-line><![CDATA[Mexico City ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2019</year>
</pub-date>
<volume>97</volume>
<numero>2</numero>
<fpage>218</fpage>
<lpage>235</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-42982019000200218&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-42982019000200218&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-42982019000200218&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Background:  Distinguishing species and populations in Crassulaceae is challenging because of the morphological variability and inter-specific hybridization. Currently our understanding of the morphological and anatomical features in Echeveria is poor, and therefore it is difficult to delimit species, and morphotypes within the species.  Question:  Our objective was to describe the foliar anatomy and the shape of accessions in E. aff. gigantea. We used E. gibbiflora, another species in the series as a comparison group. Comparing the two species allowed us to evaluate the relationship between anatomy and morphology in E. aff. gigantea.  Methods:  We performed a survey of anatomical features in seven accessions of E. aff. gigantea, and one accession of E. gibbiflora. We obtained epidermal prints, leaf sections, performed geometric and morphometric analyses.  Results:  We found that 65 % of the anatomical traits are heterogeneous among the taxonomic units. Our analysis showed that E. gibbiflora and some E. aff. gigantea accessions share extensive anatomical similarities. There was variation within the E. aff. gigantea, suggesting that at least one of the accessions is an independent taxonomic group. The traits with the largest contribution to variation between the groups were related to the epidermis, the hypodermis, the type of vascular bundles and the collenchyma associated to the vascular bundles. In addition we quantified the variation in leaf shape. Interestingly, we found correlations between the organ shape and anatomical traits.  Conclusion:  These analyses provide information about traits towards the morpho-anatomical definition of E. aff. gigantea variation and suggest developmental correlation yet to be explained.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes:  La distinción de especies y poblaciones en la familia Crassulaceae es un desafío debido a la variabilidad morfológica y la hibridación interespecífica dentro de los géneros. Nuestra comprensión de las características morfológicas y anatómicas del género Echeveria es deficiente y difícil delimitar especies y morfotipos.  Preguntas:  Nuestro objetivo fue describir la anatomía y forma de la hoja en accesiones de E. aff. gigantea y E. gibbiflora como grupo externo de comparación. Ésto fue para determinar si los caracteres anatómicos se pueden identificar como diagnósticos, además de evaluar la relación entre la anatomía y la variación morfológica.  Métodos:  Realizamos una búsqueda de características anatómicas en E. aff. gigantea y E. gibbiflora. Obtuvimos impresiones de epidermis, secciones de hojas y realizamos análisis morfométricos y geométricos.  Resultados:  Obtuvimos que el 65 % de los rasgos anatómicos son heterogéneos entre las unidades taxonómicas. Mostramos que E. gibbiflora y la accesión de E. aff. gigantea comparten amplias similitudes. Hubo variación en E. aff. gigantea, lo que sugiere que al menos una de las accesiones es un grupo taxonómico independiente. Los rasgos con la mayor contribución a la variación entre los grupos se relacionaron con la epidermis, la hipodermis, el tipo de haces vasculares y el colénquima asociado con los haces vasculares. Además cuantificamos la variación en la forma de la hoja. De esta manera encontramos correlaciones entre la forma del órgano y los rasgos anatómicos.  Conclusión:  Estos análisis aportan información acerca de caracteres potencialmente útiles para delimitar la variación morfo-anatómica en E. aff. gigantea y sugieren correlaciones de desarrollo aún por explicar.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Developmental constraints]]></kwd>
<kwd lng="en"><![CDATA[evolution]]></kwd>
<kwd lng="en"><![CDATA[leaf anatomy]]></kwd>
<kwd lng="en"><![CDATA[leaf shape]]></kwd>
<kwd lng="en"><![CDATA[multivariate analysis]]></kwd>
<kwd lng="en"><![CDATA[natural variation]]></kwd>
<kwd lng="es"><![CDATA[Análisis multivariado]]></kwd>
<kwd lng="es"><![CDATA[anatomía foliar]]></kwd>
<kwd lng="es"><![CDATA[evolución]]></kwd>
<kwd lng="es"><![CDATA[forma de la hoja]]></kwd>
<kwd lng="es"><![CDATA[restricciones de desarrollo]]></kwd>
<kwd lng="es"><![CDATA[variación natural]]></kwd>
</kwd-group>
</article-meta>
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