<?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>S0187-57792020000400555</article-id>
<article-id pub-id-type="doi">10.28940/terra.v38i3.647</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Promoción del crecimiento de Agave potatorum Zucc. por bacterias fijadoras de nitrógeno de vida libre]]></article-title>
<article-title xml:lang="en"><![CDATA[Agave potatorum Zucc. growth promotion by free-living nitrogen-fixing bacteria]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bautista-Cruz]]></surname>
<given-names><![CDATA[Angélica]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Gallegos]]></surname>
<given-names><![CDATA[Verónica]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional CIIDIR ]]></institution>
<addr-line><![CDATA[Santa Cruz Xoxocotlán Oaxaca]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2020</year>
</pub-date>
<volume>38</volume>
<numero>3</numero>
<fpage>555</fpage>
<lpage>567</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792020000400555&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792020000400555&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792020000400555&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Las bacterias fijadoras de nitrógeno de vida libre (BFNVL) pueden ser una importante alternativa para reemplazar los fertilizantes nitrogenados en la agricultura. Agave potatorum Zucc., coloquialmente conocido como maguey tobalá, es una especie silvestre de la cual se obtiene un mezcal muy demandado debido a su alta calidad. Al ser una especie silvestre, no existe mucha información referente a su manejo agronómico. En este estudio se evaluó el efecto de BFNVL en el crecimiento y contenido de sólidos solubles totales (SST) en plantas de A. potatorum bajo condiciones semi-controladas. Bajo un diseño en bloques completamente al azar se evaluaron tres BFNVL (1) Burkholderia cepacia, (2) Flavobacterium sp., (3) Paenibacillus amylolyticus y un control (sin BFNVL). En total se tuvieron 4 bloques con 15 plantas de agave por bloque, dentro de cada bloque a cada planta de agave se le aplicó al azar una BFNVL diferente. Las variables de crecimiento vegetal evaluadas después de 48 semanas fueron: altura de la planta (AP), diámetro de roseta (DRO), diámetro del tallo (DT), número de hojas desplegadas (NHD), volumen radicular (VR), densidad de raíz (DR), biomasa seca del tallo (BST), biomasa total (BT), área foliar (AF) y, SST en el tallo ((Bx). El análisis de varianza y la prueba de comparación múltiple de medias (Tukey, P &#8804; 0.05) revelaron que con respecto al control, B. cepacia incrementó 322.2% el VR, 42.6% el NHD y 72.9% los SST. P. amylolyticus incrementó 317.1% la BST. B. cepacia, Flavobacterium sp. y P. amylolyticus incrementaron aproximadamente 50.3% el DT, 48.6% el DRO, 127.2% el AF y 51.8% la AP. Flavobacterium sp. incrementó 164.8% la BT. Estos resultados sugieren que las BFNVL promueven el crecimiento de A. potatorum, por lo que pueden ser una tecnología ambientalmente amigable y económica para la producción de este agave.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary: The free-living nitrogen-fixing bacteria (FLNFB) can be an important alternative to replace mineral fertilizers in agriculture. Agave potatorum Zucc., commonly known as &#8220;maguey tobalá&#8221;, is a wild species from which a highly demanded &#8220;mezcal&#8221; (liquor) is obtained and distinguished by its high quality. As it is a wild species, not much information is available referring to its agricultural management. This study assessed the effect of FLNFB inoculation on plant growth and solid soluble content (SSC) of the stem of A. potatorum plants under semi-controlled conditions and a randomized complete block design; three FLNFB (1) Burkholderia cepacia, (2) Flavobacterium sp., (3) Paenibacillus amylolyticus and a control (without FLNFB) were assessed in four blocks with 15 agave plants per block; each plant in the same block was randomly assigned to a different FLNFB. The plant growth variables assessed after 48 weeks were: plant height (PH), plant rosette diameter (ROD), plant stem diameter (PSD), unfolded leaves number (ULN), root volume (RV), root density (RD), stem dry biomass (SDB), total dry biomass (TDB), leaf area (LA) and SSC (°Bx). An analysis of variance and Tukey&#8217;s multiple range test for means separation (P &#8804; 0.05) revealed that with respect to the control, B. cepacia increased RV 322.2%; ULN 42.6%; and SSC 72.9%. P. amylolyticus increased SDB 317.1%. B. cepacia, Flavobacterium sp., and P. amylolyticus increased the PSD approximately 50.3%; ROD 48.6%; LA 127.2%; and PH 51.8%. Flavobacterium sp. increased TB 164.8%. These results suggest that the FLNFB promoted growth of A. potatorum plants, making this environmentally friendly and inexpensive technology a good alternative for agave production.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[bacterias diazótrofas]]></kwd>
<kwd lng="es"><![CDATA[crecimiento vegetal]]></kwd>
<kwd lng="es"><![CDATA[maguey tobalá]]></kwd>
<kwd lng="en"><![CDATA[diazotrophic bacteria]]></kwd>
<kwd lng="en"><![CDATA[plant growth]]></kwd>
<kwd lng="en"><![CDATA[maguey tobalá]]></kwd>
</kwd-group>
</article-meta>
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