<?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>S2007-42982022000200412</article-id>
<article-id pub-id-type="doi">10.17129/botsci.2913</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Desarrollo floral de Acaciella angustissima (Leguminosae: Caesalpinioideae: Acacieae)]]></article-title>
<article-title xml:lang="en"><![CDATA[Floral development of Acaciella angustissima (Leguminosae: Caesalpinioideae: Acacieae)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rico-Alvarado]]></surname>
<given-names><![CDATA[Daniela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez-Acevedo]]></surname>
<given-names><![CDATA[Sandra]]></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 Iztacala Unidad de Morfología y Función]]></institution>
<addr-line><![CDATA[Tlalnepantla ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<volume>100</volume>
<numero>2</numero>
<fpage>412</fpage>
<lpage>422</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-42982022000200412&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-42982022000200412&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-42982022000200412&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes: Acaciella (Mill.) Britton &amp; Rose es un género neotropical, cuyas especies se encontraban dentro del subgénero Aculeiferum (tribu Acacieae) debido a similitudes morfológicas. Estudios moleculares reflejan relaciones filogenéticas cercanas con el género Calliandra (tribu Ingeae). Actualmente se carece de estudios del desarrollo floral para Acaciella, lo cual podría proveer de evidencias morfológicas relacionadas con la historia evolutiva de ambas tribus.  Preguntas: ¿Los patrones de desarrollo floral de Acaciella angustissima serán similares a lo reportado para especies de las tribus Acacieae e Ingeae?  Especie de estudio: Acaciella angustissima (Mill.) Britton &amp; Rose  Sitio de estudio: Pie de Vaca, Tepexi de Rodríguez, Puebla, México, mayo de 2014.  Métodos: Botones florales e inflorescencias maduras fueron colectadas y disectadas para su observación con el microscopio electrónico de barrido.  Resultados: Especie andromonoica con flores agrupadas en cabezuelas. La maduración de las inflorescencias es acrópeta y ligeramente asincrónica. Las flores son actinomorfas y presentan un nectario floral en la base de los filamentos. El patrón de surgimiento de los primordios es simultáneo en el perianto y en el androceo. El surgimiento del carpelo es precoz, previo a la aparición de los primordios de estambres, aún en las flores masculinas.  Conclusiones: A. angustissima presenta características ontogenéticas particulares, como la maduración asincrónica de los meristemos florales en la inflorescencia y el surgimiento simultáneo del androceo. Comparte con la tribu Ingeae el surgimiento acrópeto de los meristemos florales en la inflorescencia y con Acacieae e Ingeae la inserción simultánea de la corola y la aparición precoz del carpelo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: Acaciella (Mill.) Britton &amp; Rose is a Neotropical genus, whose species were within the subgenus Aculeiferum (tribe Acacieae), due to morphological similarities. Molecular studies reflect a close phylogenetic relationship with the genus Calliandra (tribe Ingeae). At present, studies of floral development are lacking for Acaciella, which could provide morphological evidence related to the evolutionary history of both tribes.  Questions: Will the floral development patterns of Acaciella angustissima be similar to those reported for species of Acacieae and Ingeae tribes?  Studied species: Acaciella angustissima (Mill.) Britton &amp; Rose  Study site and dates: Pie de Vaca, Tepexi de Rodríguez, Puebla, Mexico, May 2014.  Methods: Flower buds and mature inflorescences were collected and dissected for their observation with the scanning electron microscope.  Results: Andromonoecious species with flowers in capitate inflorescences. The inflorescence maturation is acropetal and slightly asynchronous. The flowers are actinomorphic and have a floral nectary at the base of the filaments. The patterns of inception are simultaneous in the perianth and the androecium. The carpel inception is precocious, prior to the appearance of stamen buds, even in male flowers.  Conclusions: A. angustissima has particular ontogenetic characteristics, such as the asynchronous maturation of the flower meristems in the inflorescence and the simultaneous emergence of the androecium. It shares with the tribe Ingeae the acropetal inception of the floral meristems in the inflorescence, and with Acacieae and Ingeae the simultaneous inception of the corolla and the precocious inception of the carpel.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Aculeiferum]]></kwd>
<kwd lng="es"><![CDATA[asincrónico]]></kwd>
<kwd lng="es"><![CDATA[Ingeae]]></kwd>
<kwd lng="es"><![CDATA[nectario]]></kwd>
<kwd lng="es"><![CDATA[tricomas]]></kwd>
<kwd lng="en"><![CDATA[Aculeiferum]]></kwd>
<kwd lng="en"><![CDATA[asynchronous]]></kwd>
<kwd lng="en"><![CDATA[Ingeae]]></kwd>
<kwd lng="en"><![CDATA[nectary]]></kwd>
<kwd lng="en"><![CDATA[trichomes]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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