<?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>1692-3561</journal-id>
<journal-title><![CDATA[Biotecnología en el Sector Agropecuario y Agroindustrial]]></journal-title>
<abbrev-journal-title><![CDATA[Rev.Bio.Agro]]></abbrev-journal-title>
<issn>1692-3561</issn>
<publisher>
<publisher-name><![CDATA[Taller Editorial Universidad del Cauca]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1692-35612021000100128</article-id>
<article-id pub-id-type="doi">10.18684/bsaa(19)128-138</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Rizobios nativos eficientes en la fijación de nitrógeno en Leucaena leucocephala en Rio Grande do Sul, Brasil]]></article-title>
<article-title xml:lang="en"><![CDATA[Native rhizobia efficient in nitrogen fixation in Leucaena leucocephala in Rio Grande do Sul, Brazil]]></article-title>
<article-title xml:lang="pt"><![CDATA[Rizóbios autóctones eficientes na fixação de nitrogênio em Leucaena leucocephala no Rio Grande do Sul, Brasil]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[CUBILLOS-HINOJOSA,]]></surname>
<given-names><![CDATA[JUAN-GUILLERMO]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[DA SILVA-ARAUJO,]]></surname>
<given-names><![CDATA[FERNANDA]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[SACCOL-DE SÁ,]]></surname>
<given-names><![CDATA[ENILSON-LUIZ]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Popular del Cesar Departamento de Microbiología Doctor en Ciencia del Suelo]]></institution>
<addr-line><![CDATA[Valledupar ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,aff2  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidade Federal do Rio Grande do Sul Programa de Pós-graduação em Ciência do Solo Laboratório de Microbiologia do Solo]]></institution>
<addr-line><![CDATA[Porto Alegre ]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<volume>19</volume>
<numero>1</numero>
<fpage>128</fpage>
<lpage>138</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S1692-35612021000100128&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S1692-35612021000100128&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S1692-35612021000100128&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La selección de rizobios nativos fijadores de nitrógeno (N) es importante para la producción de leucaena utilizada en la producción pecuaria. En el estado de Rio Grande do Sul (RS), Brasil es escasa la información de cepas nativas de rizobios con capacidad simbiótica con plantas de leucaena. El objetivo de este trabajo fue seleccionar rizobios nativos, eficientes en la fijación biológica de N en plantas de leucaena en RS. Se tomaron muestras de suelo y nódulos en diferentes localidades de RS, luego se utilizaron semillas de leucaena para obtener nódulos que fueron procesados en medios de cultivo para la obtención de los aislamientos. Se realizó un experimento en condiciones de invernadero para evaluar la eficiencia de los rizobios, mediante la determinación de la masa seca de la parte aérea (MSPA), masa seca de la raíz, número de nódulos y N acumulado de las plantas. Se seleccionaron los aislamientos de rizobios Leu01 y Leu02 como eficientes en la fijación de N por proporcionar aumento de la MSPA y acumulo de N en las plantas de leucaena similar al tratamiento control que recibió N mineral. Por tanto, estos aislamientos podrían ser promisores en futuros estudios en invernadero y campo de esta leguminosa.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The selection of native rhizobia nitrogen (N)-fixing is important for the production of leucaena used in livestock production. In the state of Rio Grande do Sul (RS), Brazil there is little information of native isolates of rhizobia with symbiotic capacity with leucaena plants. The objective of this research was to select native rhizobia, efficient in the biological N fixation in leucaena plants in RS state. Soil and nodule samples were taken at different locations in RS, then leucaena seeds were used to obtain nodules that were processed in culture media to obtain the isolates. An experiment under greenhouse conditions was conducted to evaluate the efficiency of rhizobia isolates. The dry shoot dry mass (SDM), dry mass of the root, number of nodules and the N accumulated N of the plants were determined. The isolates of rhizobia Leu01 and Leu02 were selected as efficient in N fixation because they provide increase in MSPA and an accumulation of N in leucaena plants similar to the control treatment that received N mineral. These isolates could be promising in future greenhouse and field studies of this legume.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[RESUMO A seleção de rizóbios autóctones fixadores de nitrogênio (N) é importante para a produção de leucena utilizada para a produção pecuária. No estado do Rio Grande do Sul (RS), Brasil, existem poucas informações sobre isolados de rizóbios autóctones com capacidade simbiótica com plantas de leucena. O objetivo deste trabalho foi selecionar isolados de rizóbios autóctones, eficientes na fixação biológica de nitrogênio em plantas de leucena no estado do RS. Foram coletadas amostras de solo e nódulos em diferentes locais do RS e, logo foram utilizadas sementes de leucena para obter os nódulos que em seguida foram processados em meios de cultura para obtenção dos isolados. Foi conduzido um experimento em casa de vegetação para avaliar a eficiência dos isolados de rizóbios, determinando-se a massa seca da parte aérea, massa seca da raiz, número de nódulos e nitrogênio acumulado nas plantas. Foram selecionados os isolados de rizóbios Leu01 e Leu02 como eficientes na fixação de N por proporcionarem o aumento da MSPA e acumulo de N nas plantas de leucena, semelhante ao tratamento controle não inoculado que recebeu fertilização nitrogenada, sendo estes isolados considerados como promissores que poderiam ser utilizados em outros estudos em casa de vegetação e campo desta leguminosa.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Simbiosis]]></kwd>
<kwd lng="es"><![CDATA[Leguminosas]]></kwd>
<kwd lng="es"><![CDATA[Promoción de crecimiento vegetal]]></kwd>
<kwd lng="en"><![CDATA[Symbiosis]]></kwd>
<kwd lng="en"><![CDATA[Legumes]]></kwd>
<kwd lng="en"><![CDATA[Plant growth promotion]]></kwd>
<kwd lng="pt"><![CDATA[Simbioses]]></kwd>
<kwd lng="pt"><![CDATA[Leguminosas]]></kwd>
<kwd lng="pt"><![CDATA[Promoção de crescimento vegetal]]></kwd>
</kwd-group>
</article-meta>
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