<?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>2007-0934</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias agrícolas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Cienc. Agríc]]></abbrev-journal-title>
<issn>2007-0934</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-09342016000701613</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Valoración de cepas silvestres de Azospirillum sp. y Gluconacetobacter sp. como promotoras de crecimiento vegetal]]></article-title>
<article-title xml:lang="en"><![CDATA[Rating wild strains of Azospirillum sp. and Gluconacetobacter sp. as promoters of plant growth]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Piña Guillén]]></surname>
<given-names><![CDATA[Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García Meneses]]></surname>
<given-names><![CDATA[Virginia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herrera López]]></surname>
<given-names><![CDATA[Humberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores Torres]]></surname>
<given-names><![CDATA[Jesús Adolfo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Tecnológica de Izúcar de Matamoros Programa Educativo de Agrobiotecnología ]]></institution>
<addr-line><![CDATA[Izúcar de Matamoros Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>11</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>11</month>
<year>2016</year>
</pub-date>
<volume>7</volume>
<numero>7</numero>
<fpage>1613</fpage>
<lpage>1623</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342016000701613&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342016000701613&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342016000701613&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los esquemas actuales de nutrición vegetal implican el uso extensivo de fertilizantes químicos que acarrean consigo numerosos efectos secundarios entre los cuales destacan la contaminación de los mantos freáticos y la progresiva erosión del suelo, lo cual refleja la imperiosa necesidad de alternativas que permita reemplazar de forma eficiente aquellos esquemas. La alternativa propuesta por este trabajo, desarrollado en las instalaciones de la Universidad Tecnológica de Izúcar de Matamoros en 2013, es impulsar el uso de biofertilizantes elaborados a base de bacterias autóctonas de la región, para lo cual, se realizaron ensayos in vitro e in planta que demuestran su efecto como promotores de crecimiento vegetal por medio de mecanismos como la fijación biológica de nitrógeno (FBN) y la producción de reguladores de crecimiento. Se aislaron dos cepas empleando medios de cultivo carentes de nitrógeno, ambas caracterizadas de forma parcial, la primera de ellas pertenece al género Azospirillum denominada M1 aislada de raíces de Jatropha, la segunda del género Gluconacetobacter denominada G1 aislada de raíces de caña de azúcar. En los ensayos realizados en esquejes de pitahaya, plantas de maíz y caña de azúcar tanto in vitro como in planta se observó que ambas cepas poseen la capacidad de promover la formación de raíces laterales y que el número de estas es mayor en comparación con testigos no inoculados, del mismo modo, se observó que la cepa M1 posee un efecto semejante en rizogénesis al de la cepa G1 y que la coinoculación de ambas cepas en estos modelos vegetales.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The current patterns of plant nutrition involve extensive use of chemical fertilizers that bring with it numerous side effects among which pollution of groundwater and progressive soil erosion, reflecting the urgent need for alternatives that allow replace efficiently those schemes. The proposal for this work alternative, developed in the facilities of the Technological University of Izucar de Matamoros in 2013, is to promote the use of bio-fertilizers prepared from indigenous bacteria in the region, for which, were performed assays in vitro and inplanta demonstrating its effect as plant growth promoters through mechanisms such as biological nitrogen fixation (FBN) and the production of growth regulators. Two strains were isolated using media lacking culture nitrogen, both characterized in part, the first of which belongs to the genus Azospirillum called M1 isolated from roots of Jatropha, the second genus Gluconacetobacter called G1 isolated from roots of sugar cane. In tests on cuttings of dragon fruit, corn plants and sugarcane both in vitro and in planta it was observed that both strains have the ability to promote the formation of lateral roots and that the number of these is higher compared to witnesses not it inoculated likewise, it was observed that the strain M1 has a similar effect on the G1 rhizogenesis strain and co-inoculation of both strains in these plant models.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[autóctonas]]></kwd>
<kwd lng="es"><![CDATA[bacterias]]></kwd>
<kwd lng="es"><![CDATA[biofertilizantes]]></kwd>
<kwd lng="en"><![CDATA[bacteria]]></kwd>
<kwd lng="en"><![CDATA[bio-fertilizers]]></kwd>
<kwd lng="en"><![CDATA[native]]></kwd>
</kwd-group>
</article-meta>
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