<?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>S1405-27682020000200137</article-id>
<article-id pub-id-type="doi">10.18387/polibotanica.50.10</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Chemical profiling of the urticating trichomes from Cnidoscolus multilobus (&#8220;mala mujer&#8221;) and their antimicrobial activity]]></article-title>
<article-title xml:lang="es"><![CDATA[Perfil químico de los tricomas urticantes de Cnidoscolus multilobus (&#8220;mala mujer&#8221;) y su actividad antimicrobiana]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pacheco-Hernández]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villa-Ruano]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rubio-Rosas]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vásquez-Lara]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Investigación en Biotecnología Aplicada  ]]></institution>
<addr-line><![CDATA[ Tlaxcala]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Benemérita Universidad Autónoma de Puebla Centro Universitario de Vinculación y Transferencia de Tecnología ]]></institution>
<addr-line><![CDATA[ Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Benemérita Universidad Autónoma de Puebla Centro Universitario de Vinculación y Transferencia de Tecnología ]]></institution>
<addr-line><![CDATA[ Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma de Querétaro Facultad de Química ]]></institution>
<addr-line><![CDATA[Santiago de Querétaro ]]></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>50</numero>
<fpage>137</fpage>
<lpage>146</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-27682020000200137&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-27682020000200137&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-27682020000200137&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Cnidoscolus multilobus (Pax.) I.M. Johnst (Euphorbiaceae) is a stinging plant widely distributed in the south of Mexico. Currently, chemical and biological properties of the endogenous fluid from the prickles of C. multilobus are still unknown. Thus, the objective of this work was to identify the inflammatory-inducing toxins contained in the prickles of C. multilobus and their possible antimicrobial activity. The chemical identification and quantification of these toxins were carried out by GC-MS and HPLC-DAD. Simultaneously, the endogenous fluid and its most abundant constituents (commercially acquired) were individually tested against opportunistic phytopathogens using the broth microdilution method and XTT antifungal method. According to our results, the fluid contained histamine (17.3-28.4 µg mL-1), dimethylethylamine (1.7-3.6 µg mL-1), acetylcholine (0.6-1.3 µg mL-1), serotonin (24.6-45.8 µg mL-1), oxalic acid (2.2-9.6 µg mL-1) and formic acid (0.9-4.7 µg mL-1). The in vitro growth of Pseudomonas syringae pv. tabaci TBR2004 (MIC, 122.2 µL mL-1), P. syringae pv. tomato DC3000 (MIC, 105.8 µL mL-1), Fusarium oxysporum ATCC 62506 (MIC, 97.4 µL mL-1) and Phytophthora capsici ATCC 15399 (MIC, 163.2 µL mL-1) was inhibited by the fluid. Contrarily, the natural fluid had no effect on the in vitro growth of Clavibacter michiganensis AB299158. The individual assessment of the main compounds dissolved in the fluid revealed that histamine possesses substantial anti-phytopathogenic activity (145.1-219.5 µL mL-1). According to our results, pain-inducing toxins from the prickles of C. multilobus not only are toxic for mammal species, these substances also exhibit inhibitory properties against opportunistic phytopathogens.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Cnidoscolus multilobus (Pax.) I.M. Johnst (Euphorbiaceae) es una planta con pelos urticantes ampliamente distribuida en el sur de México. En la actualidad, las propiedades químicas y biológicas del fluido endógeno de las espinas de C. multilobus se desconocen. De este modo, el objetivo de este trabajo fue identificar los compuestos tóxicos presentes en el fluido de los tricomas de Cnidoscolus multilobus y su posible actividad antimicrobiana. La determinación y cuantificación de las sustancias toxicas se efectuó por GC-MS y HPLC-DAD. Simultáneamente, el fluido endógeno y sus compuestos más abundantes (adquiridos comercialmente), fueron individualmente ensayados contra fitopatógenos oportunistas mediante el método de microdilución en caldo con rezasurina y el método XTT anti-fúngico. De acuerdo a nuestros resultados, el fluido contuvo histamina (17.3-28.4 µg mL-1), dimetiletilamina (1.7-3.6 µg mL-1), acetilcolina (0.6-1.3 µg mL-1), serotonina (24.6-45.8 µg mL-1), ácido oxálico (2.2-9.6 µg mL-1) y ácido fórmico (0.9-4.7 µg mL-1). El crecimiento in vitro de Pseudomonas syringae pv. tabaci TBR2004 (MIC, 122.2 µL mL-1), P. syringae pv. tomato DC3000 (MIC, 105.8 µL mL-1), Fusarium oxysporum ATCC 62506 (MIC, 97.4 µL mL-1) y Phytophthora capsici ATCC 15399 (MIC, 163.2 µL mL-1) fue inhibido por el fluido natural. Contrariamente, el fluido natural no tuvo efecto sobre el crecimiento in vitro de Clavibacter michiganensis AB299158. El ensayo individual de los principales compuestos disueltos en el fluido reveló que la histamina posee una actividad antimicrobiana sustancial (145.1-219.5 µL mL-1). De acuerdo con nuestros resultados, las toxinas productoras de dolor en las espinas de C. multilobus no son dañinas solamente para especies de mamíferos, estas también exhiben propiedades inhibitorias contra fitopatógenos oportunistas.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Cnidoscolus multilobus]]></kwd>
<kwd lng="en"><![CDATA[endogenous fluid]]></kwd>
<kwd lng="en"><![CDATA[histamine]]></kwd>
<kwd lng="en"><![CDATA[serotonin]]></kwd>
<kwd lng="en"><![CDATA[organic acids]]></kwd>
<kwd lng="en"><![CDATA[antimicrobial]]></kwd>
<kwd lng="es"><![CDATA[Cnidoscolus multilobus]]></kwd>
<kwd lng="es"><![CDATA[fluido endógeno]]></kwd>
<kwd lng="es"><![CDATA[histamina]]></kwd>
<kwd lng="es"><![CDATA[serotonina]]></kwd>
<kwd lng="es"><![CDATA[ácidos orgánicos]]></kwd>
<kwd lng="es"><![CDATA[antimicrobianos]]></kwd>
</kwd-group>
</article-meta>
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