<?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>0188-8897</journal-id>
<journal-title><![CDATA[Hidrobiológica]]></journal-title>
<abbrev-journal-title><![CDATA[Hidrobiológica]]></abbrev-journal-title>
<issn>0188-8897</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Metropolitana, División de Ciencias Biológicas y de la Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-88972023000300339</article-id>
<article-id pub-id-type="doi">10.24275/khra1340</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Diversidad y flexibilidad metabólica de consorcios nitrificantes y desnitrificantes usados en el tratamiento de aguas residuales]]></article-title>
<article-title xml:lang="en"><![CDATA[Diversity and metabolic flexibility of nitrifying and denitrifying consortia used in wastewater treatment]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Muñoz]]></surname>
<given-names><![CDATA[José Juan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Oltehua-López]]></surname>
<given-names><![CDATA[Omar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cuervo-López]]></surname>
<given-names><![CDATA[Flor de María]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Texier]]></surname>
<given-names><![CDATA[Anne-Claire]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Metropolitana Departamento de Biotecnología Laboratorio de Fisiología Microbiana]]></institution>
<addr-line><![CDATA[Iztapalapa Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>33</volume>
<numero>3</numero>
<fpage>339</fpage>
<lpage>351</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-88972023000300339&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-88972023000300339&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-88972023000300339&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Antecedentes.  Los procesos de la nitrificación y desnitrificación forman parte del ciclo biogeoquímico del nitrógeno. Los microorganismos que los llevan a cabo son empleados en los sistemas dedicados al tratamiento de aguas residuales para eliminar un contaminante muy común; el amonio (NH4+), y liberar nitrógeno molecular (N2).  Objetivo.  Mostrar la diversidad y flexibilidad metabólica de consorcios nitrificantes y desnitrificantes usados en la eliminación de nitrógeno de aguas residuales.  Resultados.  En estos microorganismos taxonómicamente diversos, las bacterias son las mejor estudiadas. Se las divide y nombra según el proceso principal que realizan. Aunque en realidad gracias a los genes que comparten, pueden presentar una diversidad y flexibilidad metabólica, que las capacita para sobrevivir en condiciones cambiantes y con funciones distintas del proceso que canónicamente se les atribuye. Los genes característicos de estos procesos son empleados como marcadores moleculares en estudios de comunidades. Sin embargo, taxones conocidos canónicamente como nitrificantes pueden tener genes funcionales propios del proceso desnitrificante. Microorganismos catalogados como típicamente desnitrificantes pueden tener genes funcionales del proceso nitrificante. Los consorcios (flóculos, gránulos y biopelículas) empleados en la eliminación de NH4+ son un ejemplo de comunidades que pueden tener capacidades superiores o distintas de las que tienen sus integrantes individualmente.  Conclusiones.  La presente revisión conjunta información fisiológica, genética y ecológica que contribuye a entender mejor la gran diversidad y flexibilidad metabólica de los consorcios nitrificantes y desnitrificantes. Se destaca que, en los sistemas artificiales, un mayor conocimiento de los taxones participantes, así como de sus relaciones tróficas, metabólicas y de comunicación posibilitaría un mejor control de los procesos nitrificante y desnitrificante para que estos sean más eficientes y estables.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Background.  Nitrification and denitrification processes are part of the biogeochemical nitrogen cycle. The microorganisms that carry them out are used in wastewater treatment systems to remove a very common pollutant; ammonium (NH4+) and release molecular nitrogen (N2).  Objective.  Show the diversity and metabolic flexibility of nitrifying and denitrifying consortia used in the elimination of nitrogen from wastewater.  Results.  Among these taxonomically diverse microorganisms, bacteria are the best studied. They are divided and named according to the main process they carry out. Although thanks to the genes they share, their diversity and metabolic flexibility can enable them to survive under changing conditions and through functions different from the process that is canonically attributed to them. The characteristic genes of these processes are used as molecular markers in community studies. However, taxa known canonically as nitrifying may have functional genes of the denitrifying process. Microorganisms classified as typically denitrifying may have functional genes of the nitrifying process. The consortia (flocules, granules and biofilms) used in the elimination of NH4+ are an example of communities that can have superior or different capacities than those of their individual members.  Conclusions.  This review compiles physiological, genetical, and ecological information that contributes to a better understanding of the great diversity and metabolic flexibility of nitrifying and denitrifying consortia. It stands out that in artificial systems, a better knowledge of the participating taxa and their trophic, metabolic and communication relationships, would allow a better control of the nitrifying and denitrifying processes for making them more efficient and stable.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Ciclo del nitrógeno]]></kwd>
<kwd lng="es"><![CDATA[consorcio]]></kwd>
<kwd lng="es"><![CDATA[diversidad y flexibilidad metabólica]]></kwd>
<kwd lng="es"><![CDATA[proceso desnitrificante]]></kwd>
<kwd lng="es"><![CDATA[proceso nitrificante]]></kwd>
<kwd lng="en"><![CDATA[Consortium]]></kwd>
<kwd lng="en"><![CDATA[denitrifying process]]></kwd>
<kwd lng="en"><![CDATA[diversity and metabolic flexibility]]></kwd>
<kwd lng="en"><![CDATA[nitrifying process]]></kwd>
<kwd lng="en"><![CDATA[nitrogen cycle]]></kwd>
</kwd-group>
</article-meta>
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