<?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>S0187-57792015000300233</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Amonio-oxidasas bacterianas y arqueales involucradas en el ciclo del nitrógeno]]></article-title>
<article-title xml:lang="en"><![CDATA[Bacterial and archaeal ammonium-oxidases involved in nitrogen cycle]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Andrade Ochoa]]></surname>
<given-names><![CDATA[Sergio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Erosa de la Vega]]></surname>
<given-names><![CDATA[Gilberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Nevárez Moorillón]]></surname>
<given-names><![CDATA[Guadalupe Virginia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Chihuahua Facultad de Ciencias Químicas ]]></institution>
<addr-line><![CDATA[Chihuahua Chih.]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2015</year>
</pub-date>
<volume>33</volume>
<numero>3</numero>
<fpage>233</fpage>
<lpage>245</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792015000300233&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792015000300233&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792015000300233&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La nitrificación, la oxidación microbiana de amoníaco a nitrato, juega un papel crítico en el ciclo global del nitrógeno. Se ha considerado a dos grupos distintos de bacterias capaces de oxidar el amoníaco (AOB) como las responsables de llevar a cabo el primer paso de la nitrificación; en esos dos grupos se encuentran las Beta-proteobacterias, que incluyen a los géneros Nitrosomonas y Nitrosospira, y las Gamma-proteobacterias, que engloban al género Nitrosococcus. Sin embargo, se ha demostrado la existencia de arqueas oxidantes de amoníaco (AOA) y su contribución al ciclo del nitrógeno, siendo Nitrosopumilus maritimus la más estudiada en este proceso. La dinámica entre estos dos sistemas de oxidantes de amoníaco es compleja y los estudios se han enfocado a distintos hábitats, se ha propuesto que las contribuciones relativas de las comunidades AOA y AOB dependen de propiedades fisicoquímicas del ambiente, que afectan su abundancia y diversidad; esto dificulta establecer con exactitud el nicho ecológico en el que se desempeña cada comunidad. El objetivo de esta revisión es discutir la evidencia científica que facilite el entendimiento del papel que desempeñan los microorganismos oxidantes del amoníaco.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Nitrification, microbial oxidation of ammonia to nitrate, plays a critical role in the nitrogen cycle. Two distinct groups of ammonia oxidizing bacteria (AOB) are believed to be responsible for the first step of nitrification. These two groups of Beta-proteobacteria include the genera Nitrosomonas and Nitrosospira and the Gamma-proteobacteria group, which includes Nitrosococcus . However, the existence of ammonia oxidizing archaea (AOA) and their contribution to the nitrogen cycle have been demonstrated. Nitrosopumilus maritimus is the most studied organism in the oxidation of ammonia. The dynamics between these two different systems of ammonia oxidizing tends to be complex. Current studies are focused on different habitats, and it has been proposed that the relative contributions of AOA and AOB communities depend on certain physical-chemical properties of their environment, which affect their abundance and diversity. It is thus diificult to pinpoint the ecological niche of each community. This paper reviews the scientific evidence that facilitates understanding the role of ammonia oxidizing microorganisms.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[nitrificación]]></kwd>
<kwd lng="es"><![CDATA[bacterias del suelo]]></kwd>
<kwd lng="es"><![CDATA[oxidación biológica de amoníaco]]></kwd>
<kwd lng="en"><![CDATA[nitrification]]></kwd>
<kwd lng="en"><![CDATA[soil bacteria]]></kwd>
<kwd lng="en"><![CDATA[biological ammonia oxidation]]></kwd>
</kwd-group>
</article-meta>
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<source><![CDATA[Appl. Environ. Microbiol.]]></source>
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</back>
</article>
