<?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>S2007-09342023000900303</article-id>
<article-id pub-id-type="doi">10.29312/remexca.v14i29.3543</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Protección contra heladas mediante anticongelante, aminoácidos y lombricomposta en etapas fenológicas de frijol]]></article-title>
<article-title xml:lang="en"><![CDATA[Protection against frosts by antifreeze, amino acids, and vermicompost in phenological stages of the bean]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Calderón-Tomás]]></surname>
<given-names><![CDATA[Celene]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Díaz-Ruiz]]></surname>
<given-names><![CDATA[Ramón]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Contreras-Ramos]]></surname>
<given-names><![CDATA[Juan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Ramírez]]></surname>
<given-names><![CDATA[Efraín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[San Pedro Cholula Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2023</year>
</pub-date>
<volume>14</volume>
<numero>spe29</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342023000900303&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342023000900303&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342023000900303&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El cultivo del frijol es una de las principales actividades de la economía campesina en México; sin embargo, se encuentra sometido a diferentes tipos de estrés, donde las heladas afectan significativamente su cultivo, por esta razón, es necesario buscar alternativas que brinden mayor tolerancia a las plantas. Así, el objetivo fue evaluar el efecto de diferentes productos contra las heladas en el vástago, en las etapas fenológicas vegetativas (V) del frijol. La investigación se realizó en el invernadero del Campus Puebla del Colegio de Postgraduados en Ciencias Agrícolas durante 2018. Se utilizó la variedad Negrito CP, la cual fue sembrada en vasos de unicel. Los tratamientos utilizados fueron anticongelante (10 ml L-1 de agua), aminoácidos (1.5 g L-1 de agua) y la mezcla de ambos en la misma dosis empleada de manera individual; estos fueron aplicados con intervalo de 48 h y 96 h y expuestos a una helada simulada en un congelador de magnitud igual a 0 °C durante 1.5 h. Las heladas presentaron efectos distintos en las etapas vegetativas del frijol, las más tolerantes fueron V1 y V2. Las hojas fueron las más dañadas, seguidas de los peciolos y el tallo. Los tratamientos que proporcionaron mayor protección a las plántulas de frijol fueron An (anticongelante) y la combinación Lom+An (lombricomposta+anticongelante).]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Bean cultivation is one of the main activities of the peasant economy in Mexico; however, it is subjected to different types of stress, where frosts significantly affect its cultivation, for this reason, it is necessary to look for alternatives that provide greater tolerance to plants. Thus, the objective was to evaluate the effect of different products against frosts on the stem, in the vegetative (V) phenological stages of the bean. The research was conducted in the greenhouse of the Puebla Campus of the College of Postgraduates in 2018. The Negrito CP variety was used, which was sown in expanded polystyrene cups. The treatments used were antifreeze (10 ml L-1 of water), amino acids (1.5 g L-1 of water), and the mixture of both in the same dose used individually; these were applied with an interval of 48 h and 96 h and exposed to a simulated frost in a freezer of magnitude equal to 0 °C for 1.5 h. The frosts presented different effects on the vegetative stages of the bean, the most tolerant were V1 and V2. The leaves were the most damaged, followed by the petioles and stem. The treatments that provided the greatest protection to the bean seedlings were An (antifreeze) and the combination Ver+An (vermicompost+antifreeze).]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Phaseolus vulgaris L.]]></kwd>
<kwd lng="es"><![CDATA[estrés]]></kwd>
<kwd lng="es"><![CDATA[fenología.]]></kwd>
<kwd lng="en"><![CDATA[Phaseolus vulgaris L.]]></kwd>
<kwd lng="en"><![CDATA[phenology]]></kwd>
<kwd lng="en"><![CDATA[stress.]]></kwd>
</kwd-group>
</article-meta>
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<person-group person-group-type="author">
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<article-title xml:lang=""><![CDATA[Adaptive mechanisms of freeze avoidance in plants: a brief update]]></article-title>
<source><![CDATA[Environ. Exp. Bot.]]></source>
<year>2014</year>
<volume>99</volume>
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