<?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>S2007-42982019000200202</article-id>
<article-id pub-id-type="doi">10.17129/botsci.2069</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Liberación de oxígeno radial por las raíces de las plantas nativas de humedales tropicales costeros de Veracruz en respuesta a diferentes condiciones de inundación]]></article-title>
<article-title xml:lang="en"><![CDATA[Radial oxygen loss by roots of native tropical wetland plants of Veracruz in response of different flooding conditions]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Olivares]]></surname>
<given-names><![CDATA[Evelyn]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Marín-Muñiz]]></surname>
<given-names><![CDATA[José Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Alarcón]]></surname>
<given-names><![CDATA[María Elizabeth]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,El Colegio de Veracruz Academia de Desarrollo Regional Sustentable ]]></institution>
<addr-line><![CDATA[Xalapa ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto de Ecología A.C. Red de Manejo Biotecnológico de Recursos ]]></institution>
<addr-line><![CDATA[Xalapa ]]></addr-line>
<country>México</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>202</fpage>
<lpage>210</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-42982019000200202&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-42982019000200202&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-42982019000200202&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes:  La liberación de oxígeno por las plantas de humedales es un proceso fisiológico que oxigena el sedimento favoreciendo la actividad de los microorganismos aeróbicos, dicha actividad impacta los servicios ambientales de los humedales. Poco se sabe sobre la liberación de oxígeno por las plantas nativas de los humedales de México.  Preguntas:  ¿Cuál de las macrófitas más abundantes de los humedales de Veracruz, presenta la mayor liberación de oxígeno radial? y ¿Las condiciones de inundación tienen algún efecto en la liberación de oxígeno radial de las macrófitas nativas de los humedales costeros?  Área de estudio:  Veracruz, México.  Métodos:  Se midió la producción y porosidad de la raíz, y la liberación de oxígeno por el método de citrato de titanio en 7 de las especies nativas de los humedales de Veracruz, crecidas bajo tres condiciones hidrológicas: capilaridad, saturación e inundación.  Resultados:  Las especies con mayor peso y volumen de raíz (Pontederia sagittata, Sagitaria lancifolia y Thalia geniculata) mostraron bajas liberaciones de oxígeno radial en base a peso seco. La liberación de oxígeno por planta bajo condiciones de inundación mostró diferencias significativas entre las especies, Typha domingensis mostró mayor liberación de oxígeno (148 ± 46 µmol O2 d&#8722;1) y Leersia ligularis la menor (22 ± 46 µmol O2 d&#8722;1).  Conclusión:  La inundación ocasionó una disminución en la producción de biomasa de las raíces de las plantas nativas de los humedales de Veracruz, un aumento en la porosidad y estimuló la libración de oxígeno por planta, encontrándose diferencias significativas entre las plantas estudiadas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Background:  Radial oxygen release by wetland plants is a process that creates aerobic conditions in the sediment that enhance aerobic microbial activity. Such activity has a big impact on wetland environmental services. Little is known about radial oxygen release by native macrophytes of tropical wetlands.  Study site:  Veracruz, Mexico  Research Questions:  Which of the most abundant native macrophytes from tropical wetlands have the higher radial oxygen release? What is the effect of hydrological conditions on radial oxygen release of the most abundant native wetlands plants of tropical wetlands?  Methods:  Root production, root porosity and Oxygen radial release were measured in 7 native macrophytes of tropical wetlands in Veracruz. The macrophytes were grown under three hydrological conditions: capillarity, saturation and flooding.  Results:  The species that produced more weight and volume of root (Pontederia Sagittata, Sagitaria lancifolia y Thalia geniculata) showed low radial oxygen released base on dry weight. Under flooding conditions, radial oxygen release per plant showed significant differences between the species, being Typha dominguensis the specie with the highest oxygen radial release (148 ± 46 µmol O2 d&#8722;1) and Leersia ligularis the plant with the lowest radial oxygen release (22 ± 46 µmol O2 d&#8722;1).  Conclusion:  Flooding conditions decreased root volume and weight of native macrophytes from Veracruz wetlands, also increased root porosity and in general stimulated higher radial oxygen release per plant, with significant differences among the studied plants, indicating that radial oxygen release depend of plant phenological characteristics and the hydrological conditions.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Aireación del sedimento]]></kwd>
<kwd lng="es"><![CDATA[difusión de oxígeno]]></kwd>
<kwd lng="es"><![CDATA[estrés hídrico]]></kwd>
<kwd lng="es"><![CDATA[plantas acuáticas]]></kwd>
<kwd lng="es"><![CDATA[porosidad de raíz]]></kwd>
<kwd lng="en"><![CDATA[Aquatic plants]]></kwd>
<kwd lng="en"><![CDATA[hydric stress]]></kwd>
<kwd lng="en"><![CDATA[oxygen diffusion]]></kwd>
<kwd lng="en"><![CDATA[root porosity]]></kwd>
<kwd lng="en"><![CDATA[sediment aeration]]></kwd>
</kwd-group>
</article-meta>
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