<?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>0188-4999</journal-id>
<journal-title><![CDATA[Revista internacional de contaminación ambiental]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Int. Contam. Ambient]]></abbrev-journal-title>
<issn>0188-4999</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias de la Atmósfera y Cambio Climático]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-49992018000400725</article-id>
<article-id pub-id-type="doi">10.20937/rica.2018.34.04.13</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[EVALUACIÓN DEL EFECTO DEL CADMIO SOBRE LA ACTIVIDAD DE FENOLOXIDASAS DE TEJIDO CALLOSO DE Epithelantha micromeris INOCULADO CON RIZOBACTERIAS]]></article-title>
<article-title xml:lang="en"><![CDATA[EVALUATION OF THE CADMIUM EFFECT ON PHENOLOXIDASES FROM Epithelantha micromeris CALLUS TISSUE, INOCULATED WITH RHIZOBACTERIA]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Toledo Salas]]></surname>
<given-names><![CDATA[Analí]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández Pimentel]]></surname>
<given-names><![CDATA[María Victoria]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez Tovar]]></surname>
<given-names><![CDATA[Aída Verónica]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guerrero Zúñiga]]></surname>
<given-names><![CDATA[Leonor Angélica]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez Dorantes]]></surname>
<given-names><![CDATA[Angélica]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Nacional de Ciencias Biológicas Laboratorio de Fisiología Vegetal, Departamento de Botánica]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Nacional de Ciencias Biológicas Departamento de Microbiología]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Mexicano del Petróleo Gerencia de Transformación de Biomasa Dirección de Investigación en Transformación de Hidrocarburos]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2018</year>
</pub-date>
<volume>34</volume>
<numero>4</numero>
<fpage>725</fpage>
<lpage>735</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992018000400725&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992018000400725&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992018000400725&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Se propone el proceso de biotización como una nueva técnica para el cultivo de tejidos vegetales que permite la asociación entre plantas y microorganismos en condiciones in vitro. A la inoculación de tejido calloso cultivado in vitro se le denomina bacterización, proceso en que las bacterias estimulan el crecimiento de las plántulas e inducen cambios en su desarrollo, lo que les permite potenciar sus mecanismos de respuesta ante el estrés. Uno de los efectos más notables en las plantas expuestas a cadmio es el incremento o disminución de las enzimas antioxidantes, con la posible participación de las fenoloxidasas. El presente trabajo evaluó la respuesta de cultivos de callo de Epithelantha micromeris (Engelm.) inoculados con rizobacterias promotoras del crecimiento vegetal, a través de la actividad de guaiacol peroxidasas y hemoperoxidasas como respuesta al estrés oxidativo producido por la exposición a cadmio. De los resultados obtenidos, la presencia de las rizobacterias per se ocasionó una condición de estrés; no obstante, en presencia de cadmio se indujo una respuesta antioxidante que incluyó el incremento de fenoloxidasas, indicadoras de estrés oxidativo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT A biotization process is proposed as a new technique in plant tissue culture that allows in vitro the association between plants and microorganisms. Bacterization is the inoculation of callus tissue cultivated in vitro. In this process, bacteria promote the plants growth, induce changes in their development and increase the response mechanisms against stress conditions. One of the most notable effects of plants exposed to cadmium is the increment or inhibition of antioxidant enzymes, with the possible participation of phenoloxidases. The present study evaluated the response of callus tissue of Epithelantha micromeris (Engelm.) inoculated with plant growth promoting rhizobacteria through guaiacol peroxidases and hemoperoxidases activity as oxidative stress responses produced by cadmium exposition. From the results obtained, rhizobacteria occurrence per se generated a stress condition; however, in the presence of cadmium an antioxidant response was induced that includes the increment of phenoloxidases, which are oxidative stress indicators.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[metales pesados]]></kwd>
<kwd lng="es"><![CDATA[cultivo in vitro]]></kwd>
<kwd lng="es"><![CDATA[peroxidasas]]></kwd>
<kwd lng="es"><![CDATA[hemoperoxidasas]]></kwd>
<kwd lng="es"><![CDATA[respuesta antioxidante]]></kwd>
<kwd lng="en"><![CDATA[heavy metals]]></kwd>
<kwd lng="en"><![CDATA[in vitro culture]]></kwd>
<kwd lng="en"><![CDATA[peroxidases]]></kwd>
<kwd lng="en"><![CDATA[hemoperoxidases]]></kwd>
<kwd lng="en"><![CDATA[antioxidant response]]></kwd>
</kwd-group>
</article-meta>
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