<?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>1405-2768</journal-id>
<journal-title><![CDATA[Polibotánica]]></journal-title>
<abbrev-journal-title><![CDATA[Polibotánica]]></abbrev-journal-title>
<issn>1405-2768</issn>
<publisher>
<publisher-name><![CDATA[Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-27682020000100125</article-id>
<article-id pub-id-type="doi">10.18387/polibotanica.49.8</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Actividad antimicrobiana in vitro de extractos de Jatropha dioica Seseé contra bacterias fitopatógenas de tomate]]></article-title>
<article-title xml:lang="en"><![CDATA[In vitro antimicrobial activity of Jatropha dioica Seseé extracts against tomato phyto-pathogenic bacteria]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Pérez]]></surname>
<given-names><![CDATA[J.U.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guerra-Ramírez]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes-Trejo]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cuevas-Sánchez]]></surname>
<given-names><![CDATA[J.A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guerra-Ramírez]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Chapingo Departamento de Fitotecnia ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Chapingo Laboratorio de Productos Naturales Departamento de Preparatoria Agrícola]]></institution>
<addr-line><![CDATA[Texcoco ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma Chapingo Banco de Germoplasma Departamento de Fitotecnia]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma Chapingo Laboratorio de Productos Naturales Departamento de Preparatoria Agrícola]]></institution>
<addr-line><![CDATA[Texcoco ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<numero>49</numero>
<fpage>125</fpage>
<lpage>133</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-27682020000100125&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-27682020000100125&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-27682020000100125&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Se utilizó el método de microdiluciones en microplaca para evaluar la inhibición del crecimiento in vitro de las bacterias fitopatógenas Clavibacter michiganensis subsp. michiganensis (Cmm), Pseudomonas syringe pv. tomato (Pst) y Xanthomonas campestris pv. vesicatoria (Xcv) con extractos de diferente polaridad obtenidos a partir de raíces de Jatropha dioica Seseé (Sangre grado), especie vegetal endémica de México valorada en la medicina tradicional por sus propiedades farmacológicas y curativas. Como indicador de respiración celular en cultivos bacterianos expuestos a extractos, se utilizó cloruro de 2,3,5-trifeniltetrazolio. Los extractos metanólico, hexánico y de acetato de etilo, presentaron actividad antimicrobiana contra los fitopatógenos Cmm, Pst y Xcv. De acuerdo con los resultados, el extracto hexánico mostró la menor concentración Inhibitoria Media Máxima (IC50) contra Pst y Xcv (0.5 ± 0.01 y 1.7 ± 0.36 mg mL-1, respectivamente) por lo que se separó por cromatografía en columna. Como resultado, se aisló y purificó un sólido cristalino blanco identificado espectroscópicamente como citlalitriona, dicho compuesto también presentó actividad contra las bacterias Cmm, Pst y Xcv con una CI50 de 1.0 ± 0.13, 1.0 ± 0.11 y 1.1 ± 0.19 mg mL-1, respectivamente. Estos resultados in vitro abren la posibilidad de utilizar extractos vegetales de J. dioica para el control de las enfermedades causadas por las bacterias estudiadas en el cultivo de tomate, ofreciendo una alternativa al uso de antibióticos o compuestos de cobre.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The microplate microdilution method was used to evaluate the inhibition of in vitro growth of Clavibacter michiganensis subsp michiganensis (Cmm), Pseudomonas syringe pv. tomato (Pst) and Xanthomonas campestris pv. vesicatory (Xcv) phytopathogenic bacteria, with extracts of different polarity obtained from roots of Jatropha dioica Seseé (Blood grade), endemic plant species of Mexico valued in traditional medicine for its pharmacological and healing properties. As an indicator of cellular respiration in bacterial cultures exposed to extracts, 2,3,5-triphenyltetrazolium chloride was used. The methanolic, hexane and ethyl acetate extracts showed antimicrobial activity against the phytopathogens Cmm, Pst and Xcv. According to the results, the hexane extract showed the lowest Maximum Average Inhibitory concentration (IC50) against Pst and Xcv (0.5 ± 0.01 and 1.7 ± 0.36 mg mL-1, respectively), so it was separated by column chromatography. As a result, a white crystalline solid identified spectroscopically as citlalitrione was isolated and purified, said compound also exhibited activity against the Cmm, Pst and Xcv bacteria with an IC50 of 1.0 ± 0.13, 1.0 ± 0.11 and 1.1 ± 0.19 mg mL-1, respectively. These in vitro results open the possibility of using plant extracts of J. dioica for the control of diseases caused by the bacteria studied in tomato cultivation, offering an alternative to the use of antibiotics or copper compounds.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[extractos vegetales]]></kwd>
<kwd lng="es"><![CDATA[citlalitriona]]></kwd>
<kwd lng="es"><![CDATA[antibacterianos]]></kwd>
<kwd lng="es"><![CDATA[fitopatógenos]]></kwd>
<kwd lng="es"><![CDATA[Solanum lycopersicum]]></kwd>
<kwd lng="es"><![CDATA[Euphorbiaceae]]></kwd>
<kwd lng="es"><![CDATA[Sangre Grado]]></kwd>
<kwd lng="en"><![CDATA[plant extracts]]></kwd>
<kwd lng="en"><![CDATA[citlalitrione]]></kwd>
<kwd lng="en"><![CDATA[antibacterials]]></kwd>
<kwd lng="en"><![CDATA[phytopathogens]]></kwd>
<kwd lng="en"><![CDATA[Solanum lycopersicum]]></kwd>
<kwd lng="en"><![CDATA[Euphorbiaceae]]></kwd>
<kwd lng="en"><![CDATA[Sangre Grado]]></kwd>
</kwd-group>
</article-meta>
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