<?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>0187-7151</journal-id>
<journal-title><![CDATA[Acta botánica mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Act. Bot. Mex]]></abbrev-journal-title>
<issn>0187-7151</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Ecología A.C., Centro Regional del Bajío]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-71512021000100122</article-id>
<article-id pub-id-type="doi">10.21829/abm128.2021.1830</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Anatomy of the sporophyte of Anemia phyllitidis var. phyllitidis (Anemiaceae) from a riparian forest (Tucumán, Argentina)]]></article-title>
<article-title xml:lang="es"><![CDATA[Anatomía del esporofito de Anemia phyllitidis var. phyllitidis (Anemiaceae), de un bosque de ribera (Tucumán, Argentina)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Romagnoli]]></surname>
<given-names><![CDATA[María G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[Marcela A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Albornoz]]></surname>
<given-names><![CDATA[Patricia L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Miguel Lillo  ]]></institution>
<addr-line><![CDATA[San Miguel de Tucumán ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Fundación Miguel Lillo  ]]></institution>
<addr-line><![CDATA[San Miguel de Tucumán ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<numero>128</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-71512021000100122&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-71512021000100122&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-71512021000100122&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Background and Aims:  In Argentina seven species of the genus Anemia are recognized; one of them, A. phyllitidis, has two varieties. The anatomical records for A. phyllitidis var. phyllitidis are scarce and refer to the ontogeny of stomata, epidermis structure and type of petiole stele. This variety, which occurs in riparian forests, is affected by the increase of seasonal ecological pressures. There is scarce information about its sporophyte anatomy; hence, the aim of this work was to characterize it.  Methods: Five specimens were collected from the margin of the El Parque stream (Tucumán-Argentina). A part was herborized and the other part was fixed in FAA. Subsequently, conventional histological techniques were used and stoma density and size of stomata and trichomes were determined. Histochemical tests were performed to detect starch (lugol) and phenolic compounds (10% ferric chloride).  Key results: Anemia phyllitidis var. phyllitidis shows diarch roots and dictyostelic rhizome covered with glandular trichomes. The petiole is covered by glandular trichomes, epidermis and subepidermis composed of lignified fibers, vascular bundle with phloem surrounding xylem, two-layered pericycle surrounded by endodermis and cortical tissue with starch and phenolic compounds. Sterile pinnae have pericytic, anomocytic, and desmocytic stomata (mean size 49.8 µm × 38.7 µm); glandular trichomes; dorsoventral hypostomatic lamina, vascular bundles with pericycle and endodermis. Fertile pinnae are anatomically similar to the rachis. Silica is present in some epidermal cells of the different organs.  Conclusions:  The sporophyte of A. phyllitidis var. phyllitidis showed anatomical, morphological and physiological traits that reveal its adaptation to the riparian habitat where it grows. At the same time, the description of this variety is deepened and unpublished data for the genus are provided, such as the presence of stegmata in the fertile pinnae.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes y Objetivos:  En Argentina, el género Anemia se encuentra representado por siete especies, una de ellas, A. phyllitidis, con dos variedades. Los antecedentes anatómicos para A. phyllitidis var. phyllitidis son escasos y están referidos a la ontogenia de estomas, estructura de epidermis y tipo de estela del pecíolo. Esta variedad, que habita en bosques riparios, es afectada por el incremento de presiones ecológicas estacionales. Debido a que la información que se registra acerca de la anatomía del esporofito es escasa, el objetivo de este trabajo fue caracterizarlo.  Métodos: Cinco especímenes fueron colectados en la ribera del arroyo El Parque (Tucumán-Argentina). Una parte fue herborizada y la otra se fijó en FAA. Posteriormente fueron utilizadas técnicas histológicas convencionales y se determinaron la densidad estomática y el tamaño de estomas y tricomas. Se realizaron pruebas histoquímicas para la detección de almidón (lugol) y compuestos fenólicos (cloruro férrico al 10%).  Resultados clave: Anemia phyllitidis var. phyllitidis muestra raíces diarcas y rizoma dictiostélico cubierto por tricomas glandulares. El pecíolo posee tricomas glandulares, epidermis y subepidermis formada por fibras lignificadas, haz vascular con xilema rodeado por floema, periciclo bistrato rodeado por endodermis y en el tejido cortical almidón y compuestos fenólicos. Las pinnas estériles poseen estomas pericíticos, anomocíticos y desmocíticos (tamaño promedio 49.8 µm × 38.7 µm); tricomas glandulares; lámina dorsiventral, hipostomática y haces vasculares con periciclo y endodermis. Las pinnas fértiles son anatómicamente semejantes al raquis. Algunas células epidérmicas de los distintos órganos evidenciaron la presencia de sílice.  Conclusiones:  El esporofito de A. phyllitidis var. phyllitidis mostró rasgos anatómicos, morfológicos y fisiológicos que revelan su adaptación al hábitat ribereño donde crece. Al mismo tiempo, se profundiza la descripción de esta variedad y se aportan datos inéditos del género, como la presencia de estegmata en las pinnas fértiles.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[riparian forests]]></kwd>
<kwd lng="en"><![CDATA[silica]]></kwd>
<kwd lng="en"><![CDATA[stegmata]]></kwd>
<kwd lng="en"><![CDATA[trichome]]></kwd>
<kwd lng="en"><![CDATA[xeric environments]]></kwd>
<kwd lng="es"><![CDATA[ambientes xéricos]]></kwd>
<kwd lng="es"><![CDATA[bosques riparios]]></kwd>
<kwd lng="es"><![CDATA[estegmata]]></kwd>
<kwd lng="es"><![CDATA[tricoma]]></kwd>
<kwd lng="es"><![CDATA[sílice]]></kwd>
</kwd-group>
</article-meta>
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