<?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>S0188-49992017000200237</article-id>
<article-id pub-id-type="doi">10.20937/rica.2017.33.02.05</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[DINÁMICA DE POBLACIONES BACTERIANAS Y ACTIVIDAD DESHIDROGENASA DURANTE LA BIORREMEDIACIÓN DE SUELO RECIÉN CONTAMINADO E INTEMPERIZADO CON HIDROCARBUROS]]></article-title>
<article-title xml:lang="en"><![CDATA[BACTERIAL POPULATIONS DYNAMIC AND DEHYDROGENASE ACTIVITY DURING BIOREMEDIATION OF RECENTLY AND INTEMPERIZED HYDROCARBON CONTAMINATED SOILS]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ortíz-Maya]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Escalante-Espinosa]]></surname>
<given-names><![CDATA[Erika]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fócil-Monterrubio]]></surname>
<given-names><![CDATA[Reyna Lourdes]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Saad]]></surname>
<given-names><![CDATA[Hugo César]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Díaz Ramírez]]></surname>
<given-names><![CDATA[Ildefonso Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Juárez Autónoma de Tabasco División Académica de Ciencias Biológicas ]]></institution>
<addr-line><![CDATA[Villahermosa Tabasco]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Metropolitana Departamento de Sistemas Biológicos ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<volume>33</volume>
<numero>2</numero>
<fpage>237</fpage>
<lpage>246</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992017000200237&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992017000200237&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992017000200237&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Se evaluó la actividad deshidrogenasa y la dinámica de poblaciones bacterianas nativas en suelo contaminado con hidrocarburos durante su biorremediación por bioestimulación y atenuación natural. Se realizaron ensayos a escala mesocosmos, en la que se compararon dos condiciones: 1) contaminación reciente (28 días) y 2) intemperización (entre 28 a 56 días), con suelo artificialmente contaminado (30 000 mg de hidrocarburos totales de petróleo /kg suelo). Se estimó la riqueza de las comunidades bacterianas con base en los perfiles genómicos generados mediante electroforesis en gel con gradiente de desnaturalizantes (DGGE, por sus siglas en inglés). Además, se identificaron las poblaciones por secuenciación de las bandas dominantes en los perfiles de DGGE. La evolución de la biodegradación se estimó a través de la actividad deshidrogenasa durante los ensayos. El análisis molecular de los extractos de ADN, reveló una riqueza de genotipos similar en ambos tratamientos recién contaminados y una disminución importante de este parámetro por efecto de intemperismo. Los niveles máximos de actividad de la enzima se presentaron en el suelo recién contaminado-bioestimulado (3146.84 mg de iodo-nitro-formazan (INF)/g) en comparación con el suelo recién contaminado bajo atenuación natural (1160.19 µg INF/g). Para los suelos intemperizados, la actividad deshidrogenasa disminuyó en comparación con los demás tratamientos. Se determinó una comunidad bacteriana estable a lo largo del tiempo en el suelo intemperizado, mientras que la adición de nutrientes favoreció el incremento de la riqueza de genotipos tanto en los suelos recién contaminados como en los intemperizados. Se identificó la presencia de bacterias hidrocarbonoclastas (Burkholderia, Pelobacter) en todos los tiempos de muestreo en ambos tratamientos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Dehydrogenase activity and composition of the native microbial community were evaluated in hydrocarbon-contaminated soil during its bioremediation by biostimulation and natural attenuation. Mesocosms-scale essays were set up, comparing conditions of recent contamination (28 days) and weathering (28-56 days) with artificially contaminated soil (30 000 mg of total petroleum hydrocarbons /kg soil). The richness of the bacterial communities was estimated based on the genomic profiles generated by denaturing gradient gel electrophoresis analysis (DGGE). In addition, populations were identified by sequencing of the dominant bands in DGGE profiles. The evolution of the biodegradation was addressed through soil dehydrogenase activity during the essays. The molecular analysis of DNA extracts revealed similar genotype richness in both newly contaminated treatments, while a significant decrease of this parameter was observed in weathered treatments. The maximum levels of enzyme activity occurred in the newly contaminated-biostimulated soil (3146.84 µg iodo-nitro-formazan (INF)/g) compared to the contaminated soil under natural attenuation (1160.19 µg INF/g). For weathered soils, dehydrogenase activity decreased compared to the other treatments. It was determined a stable over time bacterial community in the weathered soil, while the addition of nutrients favored increases of genotype richness in newly contaminated and weathered soils. Hydrocarbonoclastic bacteria (Burkholderia, Pelobacter) were identified in all sampling times in both treatments.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[actividad enzimática]]></kwd>
<kwd lng="es"><![CDATA[DGGE]]></kwd>
<kwd lng="es"><![CDATA[restauración de suelos]]></kwd>
<kwd lng="es"><![CDATA[secuenciación]]></kwd>
<kwd lng="en"><![CDATA[enzymatic activity]]></kwd>
<kwd lng="en"><![CDATA[DGGE]]></kwd>
<kwd lng="en"><![CDATA[soil restoration]]></kwd>
<kwd lng="en"><![CDATA[sequencing]]></kwd>
</kwd-group>
</article-meta>
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