<?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>0034-7744</journal-id>
<journal-title><![CDATA[Revista de Biología Tropical]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. biol. trop]]></abbrev-journal-title>
<issn>0034-7744</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-77442019000601160</article-id>
<article-id pub-id-type="doi">10.15517/rbt.v67i6.36072</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Morfoanatomía e histoquímica de Hypericum juniperinum (Hypericaceae)]]></article-title>
<article-title xml:lang="en"><![CDATA[Morphoanatomy and histochemical characterization of Hypericum juniperinum (Hypericaceae)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mejía-Agudelo]]></surname>
<given-names><![CDATA[Laura Alejandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Marín-Loaiza]]></surname>
<given-names><![CDATA[Juan Camilo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Marquínez-Casas]]></surname>
<given-names><![CDATA[Xavier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Colombia-Sede Bogotá Facultad de Ciencias, Carrera ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,Departamento de Biología Laboratorio 112 ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>67</volume>
<numero>6</numero>
<fpage>1160</fpage>
<lpage>1169</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0034-77442019000601160&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0034-77442019000601160&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0034-77442019000601160&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Hypericum es un género que pertenece a la familia Hypericaceae, conformado por 469 especies de hierbas, árboles y arbustos. Dos secciones en particular, Brathys y Trygynobrathys, son parte integral de la flora de Páramo. Hypericum tiene una amplia variedad de metabolitos que están asociados con múltiples actividades farmacológicas, y específicamente en H. juniperinum se han reportado propiedades antidepresivas relacionadas con la presencia de flavonoides y compuestos fenólicos. El objetivo de esta investigación fue relacionar las estructuras anatómicas con los metabolitos detectados por métodos histoquímicos presentes en los órganos vegetativos y reproductivos de Hypericum juniperinum recolectados en el Páramo colombiano. Los órganos aéreos (tallos, hojas y flores) de Hypericum juniperinum se recolectaron en la vereda Arbolocos del municipio de Cuitiva, Boyacá (código voucher No.589611, COL). Para el análisis anatómico, los órganos de H. juniperinum se procesaron con técnicas de fijación, incorporación en parafina, corte en microtomo y tinción con azul de astra y fucsina básica. Para el análisis histoquímico se realizaron cortes a mano alzada con tinciones específicas para lípidos, compuestos fenólicos, alcaloides y pectinas. La anatomía de los órganos de H. juniperinum debe entenderse en el contexto de las condiciones de vida del Páramo. Las hojas son altamente xeromorfas ya que son cartáceas, arrosetadas, convolutas y verticales, con parénquima en empalizada biestratificado, paredes engrosadas, cutícula gruesa y cera epicuticular en ambas epidermis foliares, estomas en el lado abaxial con cámara epidérmica. Sin embargo, tiene algunas características mesomórficas, como las vainas parenquimáticas de los haces vasculares y el parénquima esponjoso suelto. Hypericum juniperinum presenta glándulas translúcidas en hojas, cáliz y gineceo, y carece de las glándulas negras típicas de la sección Hypericum a la que pertenece la planta medicinal Hypericum perforatum. El análisis histoquímico mostró lípidos en los canales de la hoja, parénquima radial del tallo y en algunas estructuras florales. Los compuestos fenólicos se detectaron a lo largo de la hoja, en el floema del tallo y en las anteras. Hypericum juniperinum carece de alcaloides y presenta pectinas en el parénquima de la vaina que rodea el haz vascular de la hoja. El presente trabajo contribuye a relacionar los metabolitos con su distribución en los tejidos de esta especie nativa. Además, la anatomía mostró que H. juniperinum tiene características de una planta de Páramo. La descripción que se proporciona aquí podría utilizarse como una monografía preliminar de plantas del género Hypericum con propiedades terapéuticas prometedoras.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Hypericum is a genus that belongs to the Hypericaceae family, with has 469 species of herbs, trees and shrubs. Two sections in particular, Brathys and Trygynobrathys are an integral part of the Paramo flora. Hypericum genus has a wide variety of metabolites that are associated with multiple pharmacological activities, and specifically in H. juniperinum antidepressant properties related to the presence of flavonoids and phenolic compounds have been reported. The objective of this research is to relate the anatomical structures with the metabolites detected by histochemical methods present in the vegetative and reproductive organs of Hypericum juniperinum collected in the Colombian Paramo. The aerial organs (stems, leaves and flowers) of Hypericum juniperinum were collected in the village Arbolocos of the municipality of Cuitiva, Boyacá (voucher code No. 589611, COL). For the anatomical analysis, the organs of H. juniperinum were processed with fixation techniques, incorporation in paraffin, cutting in microtome and staining with Astra-blue and basic fuchsin; for the histochemical analysis freehand cuts were made with specific stains for lipids, phenol compounds, alkaloids and pectins. The anatomy of the organs of H. juniperinum should be understood in the context of the living conditions of the Paramo. Leaves are highly xeromorphic as they are chartaceous, rosette-shaped, convolute and upright, with parenchyma in bistratified palisade, thickened walls, thick cuticle and epicuticular wax in both foliar epidermis, stomata on the abaxial side and with epidermal chamber. However, it has some mesomorphic characteristics such as parenchymatic bundle sheath and loose spongy parenchyma. Hypericum juniperinum has translucent glands in leaves, calyx and gynoecium, and lacks black glands typical of the Hypericum section belonging to the medicinal plant Hypericum perforatum. Histochemical analysis showed lipids in leaf canals, radial parenchyma of the stem and in some floral structures. Phenolic compounds were detected along the leaf, in the phloem of the stem and in the anthers. Hypericum juniperinum lacks alkaloids and presents pectins in the parenchyma of the sheath surrounding the vascular bundle of the leaf. The present work contributes by relating the metabolites with their distribution in the tissues of this native species. In addition, the anatomy of H. juniperinum has characteristics of the Paramo plants. Description given here could be used as a preliminary monograph of plants from the Hypericum genus with promising therapeutic properties.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[anatomical characterization]]></kwd>
<kwd lng="en"><![CDATA[phenolic compounds]]></kwd>
<kwd lng="en"><![CDATA[histochemistry]]></kwd>
<kwd lng="en"><![CDATA[translucent glands]]></kwd>
<kwd lng="en"><![CDATA[canals]]></kwd>
<kwd lng="es"><![CDATA[caracterización anatómica]]></kwd>
<kwd lng="es"><![CDATA[compuestos fenólicos]]></kwd>
<kwd lng="es"><![CDATA[histoquímica]]></kwd>
<kwd lng="es"><![CDATA[glándulas translúcidas]]></kwd>
<kwd lng="es"><![CDATA[canales]]></kwd>
</kwd-group>
</article-meta>
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