<?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>0185-3309</journal-id>
<journal-title><![CDATA[Revista mexicana de fitopatología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fitopatol]]></abbrev-journal-title>
<issn>0185-3309</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Fitopatología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0185-33092017000200304</article-id>
<article-id pub-id-type="doi">10.18781/r.mex.fit.1606-7</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Distribución, ciclo de vida y alteraciones histológicas de Heterodera sp. en zanahoria, en Puebla]]></article-title>
<article-title xml:lang="en"><![CDATA[Distribution, life cycle and histological changes by Heterodera sp. in carrot in Puebla]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Escobar-Avila]]></surname>
<given-names><![CDATA[Ilia Mariana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Medina-Canales]]></surname>
<given-names><![CDATA[María Gabriela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tovar-Soto]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Nacional de Ciencias Biológicas Departamento de Parasitología]]></institution>
<addr-line><![CDATA[CDMX ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<volume>35</volume>
<numero>2</numero>
<fpage>304</fpage>
<lpage>313</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-33092017000200304&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-33092017000200304&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-33092017000200304&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen. En el 2009 se encontró en el Valle de Tepeaca, Puebla, un nematodo formador de quistes del género Heterodera asociado a zanahoria. A la fecha se desconoce la distribución en algunos municipios productores, su ciclo de vida y las alteraciones histológicas en las raíces de plantas infectadas. Durante 2008 a 2016 se muestrearon 28 parcelas con zanahoria de seis municipios del Valle de Tepeaca. Se separaron las raíces y en ellas se buscaron hembras blancas adheridas, del suelo se extrajeron los quistes. En invernadero se sembró zanahoria cv. Mexicana en suelo naturalmente infestado, las raíces se tiñeron con fucsina ácida-lactoglicerol para conocer el tiempo de desarrollo de cada fase del ciclo. Para describir las alteraciones en raíces infectadas, éstas se incluyeron en parafina con lo que se hicieron cortes, se tiñeron con fucsina-verde rápido para su análisis. Heterodera sp. se encontró en el 93 % de las parcelas y completó su ciclo en 73 días a 20-25 oC. Las alteraciones histológicas mostraron la presencia de sitios de alimentación (sincitios) con citoplasma denso y granuloso, con núcleos hipertrofiados, disolución y engrosamiento de paredes celulares, ubicados principalmente en la corteza y cilindro vascular. Además hubo presencia de zonas lignificadas con hiperplasia e hipertrofia.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract. In 2009, in the Tepeaca Valley, Puebla, it was found a cyst-forming nematode of the genus Heterodera associated with carrot. At this time, it is unknown the distribution in some producing municipalities, its life cycle and the histological changes on infected plant roots. Between 2008 and 2016, 28 carrot fields were sampled in six municipalities of the Tepeaca Valley. The roots were separated and white females were searched, the cysts were extracted from soil. Carrot cv. Mexicana were grown in naturally infested soil in the greenhouse, the roots were stained with fuchsine lacto glycerol acid to know the development time of each cycle phase. To describe the histological changes, the infected roots were imbibed in paraffin and sections stained with fast green-fuchsine for analysis. Heterodera sp. was found in 93 % of the plots and completed its cycle in 73 days at 20-25 °C. The histological alterations show the presence of feeding sites (syncytia) with dense and granular cytoplasm, with hypertrophied nuclei, dissolution and thickening of cell walls located mainly in the cortex and vascular cylinder. There was also the presence of lignificate areas with hyperplasia and hypertrophy.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Histopatología]]></kwd>
<kwd lng="es"><![CDATA[Daucus carota cv mexicana]]></kwd>
<kwd lng="es"><![CDATA[nematodo formador de quistes]]></kwd>
<kwd lng="es"><![CDATA[endoparásito sedentario]]></kwd>
<kwd lng="en"><![CDATA[Histopathology]]></kwd>
<kwd lng="en"><![CDATA[Daucus carota cv mexicana]]></kwd>
<kwd lng="en"><![CDATA[cyst-forming nematode]]></kwd>
<kwd lng="en"><![CDATA[sedentary endoparasite]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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