<?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>S0185-33092017000200284</article-id>
<article-id pub-id-type="doi">10.18781/r.mex.fit.1701-3</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Caracterización del Viroide exocortis de los cítricos en diferentes condiciones de indexado]]></article-title>
<article-title xml:lang="en"><![CDATA[Characterization of Citrus exocortis viroid in different conditions of indexing]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alcántara-Mendoza]]></surname>
<given-names><![CDATA[Susana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vergara-Pineda]]></surname>
<given-names><![CDATA[Santiago]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Rubio]]></surname>
<given-names><![CDATA[Oscar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cambrón-Sandoval]]></surname>
<given-names><![CDATA[Víctor H.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Colmenares-Aragón]]></surname>
<given-names><![CDATA[Domingo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Nava-Díaz]]></surname>
<given-names><![CDATA[Cristian]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Querétaro Facultad de Ciencias Naturales ]]></institution>
<addr-line><![CDATA[Santa Rosa Jáuregui Querétaro]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Estación Nacional de Epidemiología, Cuarentena y Saneamiento Vegetal Departamento de Cuarentena ]]></institution>
<addr-line><![CDATA[El Marqués Querétaro]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Colegio de Posgraduados Instituto de Fitosanidad ]]></institution>
<addr-line><![CDATA[Texcoco Estado México]]></addr-line>
<country>México</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>284</fpage>
<lpage>303</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-33092017000200284&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-33092017000200284&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-33092017000200284&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen. Citrus exocortis viroid (CEVd) es un fitopatógeno regulado en la citricultura de México. El diagnóstico por indexado para detectar la presencia y transmisión de CEVd en material propagativo de bancos de germoplasma es de aplicación oficial. El objetivo de este estudio fue caracterizar al CEVd en condiciones de indexado in vitro e in vivo comparando la eficiencia de transmisión y la rapidez con que se generan los síntomas para establecer su aplicación en el diagnóstico biológico. Se evaluó altura, incidencia, área bajo la curva del progreso de la enfermedad (ABCP) y eficiencia de transmisión en plantas indicadoras de citron etrog cultivadas in vivo inoculadas por injerto y en brotes cultivados in vitro inoculados con callos. La altura media de brotes y plantas infectadas fue menor 7.5 mm y 56.3 mm respecto al testigo, la incidencia, ABCP y modelo de regresión fueron 81.2 %, 10.7, y= 0.0009x2+ 0.0693x- 0.0057, R2= 0.99 in vitro y 70.8%, 9.84, y= 0.0004x2- 0.0048x- 0.0061, R2= 0.94 in vivo, respectivamente. La eficiencia fue 99 % en ambos métodos con síntomas a partir del décimo día posterior a la inoculación in vitro y 40 in vivo. Las condiciones in vitro generan una rápida expresión de síntomas en el diagnóstico por indexado contribuyendo a la detección oportuna de CEVd para evitar su dispersión.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract. Citrus exocortis viroid (CEVd) is a regulated pathogen in Mexican citriculture. The diagnosis by indexing to detect the presence and transmission of CEVd in propagative material of germplasm banks is of official application. The aim of this study was characterizing to CEVd by in vitro and in vivo indexing to analyzing the efficiency of the transmission and the speed with which the symptoms are generated to establish their application in the biological diagnosis. The height, incidence, area under the disease progress curve (ABCP) and transmission efficiency were evaluated in etrog citron indicator plants, cultivated in vivo inoculated by grafting and in buds cultivated in vitro inoculated with callus. The mean height of buds and infected plants was 7.5 mm and 56.3 mm less than the control, incidence, ABC and regression model were 81.2%, 10.7, y= 0.0009x2+ 0.0693x- 0.0057, R2= 0.99 in vitro y 70.8%, 9.84, y= 0.0004x2- 0.0048x- 0.0061, R2= 0.94 in vivo, respectively. The efficiency of both indexing methods was 99 % with initial symptoms tenth days after the in vitro inoculation and 40 in vivo. The in vitro conditions generate a rapid expression of symptoms in the diagnosis by indexing contributing to the opportune detection of CEVd to avoid its dispersion.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[cultivo de tejidos]]></kwd>
<kwd lng="es"><![CDATA[callos]]></kwd>
<kwd lng="es"><![CDATA[pospiviroidae]]></kwd>
<kwd lng="es"><![CDATA[injerto]]></kwd>
<kwd lng="es"><![CDATA[inoculación]]></kwd>
<kwd lng="en"><![CDATA[tissue culture]]></kwd>
<kwd lng="en"><![CDATA[callus]]></kwd>
<kwd lng="en"><![CDATA[pospoviroid]]></kwd>
<kwd lng="en"><![CDATA[graft]]></kwd>
<kwd lng="en"><![CDATA[inoculation]]></kwd>
</kwd-group>
</article-meta>
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