<?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>0187-5779</journal-id>
<journal-title><![CDATA[Terra Latinoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Terra Latinoam]]></abbrev-journal-title>
<issn>0187-5779</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de la Ciencia del Suelo A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-57792021000100108</article-id>
<article-id pub-id-type="doi">10.28940/terra.v39i0.759</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Tolerancia de plantas de zonas áridas a metales pesados]]></article-title>
<article-title xml:lang="en"><![CDATA[Tolerance to heavy metals of plants from arid zones]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Perales-Aguilar]]></surname>
<given-names><![CDATA[Lucila]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Esquivel-Rivera]]></surname>
<given-names><![CDATA[José Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silos-Espino]]></surname>
<given-names><![CDATA[Héctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carrillo-Rodríguez]]></surname>
<given-names><![CDATA[José Cruz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Perales-Segovia]]></surname>
<given-names><![CDATA[Catarino]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Tecnológico El Llano Aguascalientes (ITEL) Tecnológico Nacional de México ]]></institution>
<addr-line><![CDATA[Aguascalientes Aguascalientes]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Tecnológico Valle de Oaxaca (ITVO) Tecnológico Nacional de México ]]></institution>
<addr-line><![CDATA[Santa Cruz Xoxocotlán Oaxaca]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>39</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792021000100108&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792021000100108&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792021000100108&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: En México las zonas áridas representan más de la mitad del territorio, en estos lugares existe erosión debido a la contaminación, por lo que es importante estudiar el nivel de tolerancia de las especies vegetales representativas para restaurar o reforestar. Se evaluaron seis especies de zonas áridas Agave funkiana, A. obscura, A. salmiana de la familia Asparagaceae y Opuntia cochenillifera, O. ficus-indica, Pereskia sacharosa, de la familia Cactaceae. Se propagaron in vitro para la obtención de brotes que fueron establecidos a diferentes concentraciones de cadmio (Cd2+) y plomo (Pb2+) durante la etapa de enraizamiento para determinar su tolerancia. Se utilizó el método Probit para calcular la concentración letal media (CL50) de las seis especies a las diferentes dosis. Las diferentes concentraciones de Cd y Pb, produjeron distintos efectos en las seis especies de plantas de zonas áridas evaluadas en esta investigación. A. salmiana y P. sacharosa obtuvieron una mortalidad de 55% con 0.009 mM de Cd y una mortalidad de 77% con 0.8 mM para Pb, siendo estas concentraciones las más altas. Los bioensayos ecotoxicológicos son útiles para evaluar contaminantes como los metales pesados en plantas tolerantes como A. obscura, O. cochenillifera y O. ficus-indica.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary: In Mexico, arid areas represent more than half of the territory where erosion is due to pollution, so the level of tolerance of representative plant species should be studied to restore or reforest. This study evaluated six species from arid zones - Agave funkiana, A. obscura, A. salmiana of the Asparagaceae family and Opuntia cochenillifera, O. ficus-indica, Pereskia sacharosa of the Cactaceae family. The plants were propagated in vitro to obtain shoots that were established at different cadmium (Cd2+) and lead (Pb2+) concentrations during the rooting stage to determine their tolerance. The Probit Analysis was used to calculate the mean lethal concentration (LC50) at the different doses, which produced different effects in the six species of arid zone plants evaluated in this investigation. The species A. salmiana and P. sacharosa obtained a mortality of 55% with 0.009 mM of Cd and 77% with 0.8 mM for Pb. These concentrations were the highest. Thus, ecotoxicological bioassays are useful for evaluating contaminants, such as heavy metals in tolerant plants as A. obscura, O. cochenillifera, and O. ficus-indica.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[cadmio]]></kwd>
<kwd lng="es"><![CDATA[contaminación]]></kwd>
<kwd lng="es"><![CDATA[método Probit]]></kwd>
<kwd lng="es"><![CDATA[plomo]]></kwd>
<kwd lng="es"><![CDATA[propagación in vitro]]></kwd>
<kwd lng="en"><![CDATA[cadmium]]></kwd>
<kwd lng="en"><![CDATA[contamination]]></kwd>
<kwd lng="en"><![CDATA[Probit method]]></kwd>
<kwd lng="en"><![CDATA[lead]]></kwd>
<kwd lng="en"><![CDATA[in vitro propagation]]></kwd>
</kwd-group>
</article-meta>
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