<?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>1405-3195</journal-id>
<journal-title><![CDATA[Agrociencia]]></journal-title>
<abbrev-journal-title><![CDATA[Agrociencia]]></abbrev-journal-title>
<issn>1405-3195</issn>
<publisher>
<publisher-name><![CDATA[Colegio de Postgraduados]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-31952007000100087</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Método simple para la detección múltiple de viroides de cítricos]]></article-title>
<article-title xml:lang="en"><![CDATA[A simple method for the multiple detection of citrus viroids]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Almeyda-León]]></surname>
<given-names><![CDATA[Isidro H.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rocha-Peña]]></surname>
<given-names><![CDATA[Mario A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Iracheta-Cárdenas]]></surname>
<given-names><![CDATA[M. Magdalena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Orona-Castro]]></surname>
<given-names><![CDATA[Fermín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Kahlke]]></surname>
<given-names><![CDATA[Craig J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,INIFAP  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Texas A&amp;M University  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>USA</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2007</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2007</year>
</pub-date>
<volume>41</volume>
<numero>1</numero>
<fpage>87</fpage>
<lpage>93</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-31952007000100087&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-31952007000100087&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-31952007000100087&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La detección de viroides mediante RT-PCR en México es de uso común en los laboratorios de acreditación para determinar la calidad sanitaria de plantas de cítricos, cuando se van a utilizar árboles madre para propagar plantas de vivero. En el presente trabajo se describe una metodología simple para la detección múltiple de los viroides Citrus exocortis viroid (CEVd), CVd II, y Citrus viroid III (CVd III) en una sola reacción de RT-PCR. La extracción de ácidos nucleicos se efectuó con cantidades mínimas (250 mg) de tejido, y adicionando 1% polivinilpirrolidona en la solución salina de extracción de glicina-fosfato. La detección de los tres viroides fue exitosa cuando las reacciones de RT se efectuaron con 2.0 &#956;g de ARN, 1.0-1.5 mM de dNTP&#8217;s, 0.90 &#956;M, del iniciador complementario (C) para CEVd, y 0.49 &#956;M para los correspondientes iniciadores C para CVd II y CVd III, respectivamente, seguidas por reacciones de PCR con 2-4 &#956;L de cADN procedente de RT y 10, 5, 5 pmoles del juego de iniciadores homólogos (H) y C para CEVd, CVd II y CVd III. Al usar menos de 1.0 &#956;M de dNTP&#8217;s, así como cantidades iguales de los iniciadores C en las reacciones de RT y cantidades iguales del juego de iniciadores C y H para CEVd and CVd II y CVd III en las reacciones de PCR, proporcionaron detección simultánea confiable para CVd II y CVd III, pero resultados erráticos con CEVd.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract RT-PCR for viroid detection is commonly used by certified laboratories in México to determine sanitary quality of citrus plants, when donor trees are to be used to propagate plants in nursery. This paper describes a simple methodology for multiple detection of the viroids Citrus exocortis viroid (CEVd), CVd II and Citrus viroid III (CVdIII) in a single RT-PCR reaction. Nucleic acids were extracted with minimum quantities of tissue (250 mg) and 1% polyvinylpyrrodolidone was added to a saline extraction solution of glycine-phosphate. Detection of the three viroids was successful when the RT reactions were performed with 2.0 &#956;g of RNA, 1.0-1.5 mM of dNTPs, 0.90 &#956;M of the complementary primer (C) for CEVd, and 0.49 &#956;M for the corresponding C primers for CVd II and CVd III, respectively, followed by PCR reactions with 2-4 &#956;L of cDNA from RT and 10, 5, 5 pmols of the set of homologous (H) and C set of primers for CEVd, CVd II and CVd III. The use of less than 1.0 &#956;M of dNTPs and equal quantities of the C primers in the RT reactions and equal quantities of both C and H primers for CEVd and CVd II and CVd III in the PCR reactions provided reliable simultaneous detection for CVd II and CVd III, but erratic results with CEVd.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Citrus cachexia]]></kwd>
<kwd lng="es"><![CDATA[citrus exocortis]]></kwd>
<kwd lng="es"><![CDATA[extracción de ácidos nucleicos]]></kwd>
<kwd lng="es"><![CDATA[polivinilpirrolidona]]></kwd>
<kwd lng="en"><![CDATA[Citrus cachexia]]></kwd>
<kwd lng="en"><![CDATA[citrus exocortis]]></kwd>
<kwd lng="en"><![CDATA[nucleic acid extraction]]></kwd>
<kwd lng="en"><![CDATA[polyvinylpyrrolidon]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Almeyda-León]]></surname>
<given-names><![CDATA[I. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Iracheta-Cárdenas]]></surname>
<given-names><![CDATA[M. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Jasso-Argumedo]]></surname>
<given-names><![CDATA[J. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Curti-Díaz]]></surname>
<given-names><![CDATA[S. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Ruíz-Beltrán]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Rocha-Peña]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reexamination of citrus viroids of Tahiti lime in Mexico]]></article-title>
<source><![CDATA[Rev. Mex. Fitopatol.]]></source>
<year>2002</year>
<volume>20</volume>
<page-range>152-60</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Almeyda-León]]></surname>
<given-names><![CDATA[I. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Iracheta-Cárdenas]]></surname>
<given-names><![CDATA[M. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Orona-Castro]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Kahlke]]></surname>
<given-names><![CDATA[C. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Rocha-Peña]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Extracción simple de ácidos nucleicos para la detección de viroides de cítricos mediante RT-PCR]]></article-title>
<source><![CDATA[Rev. Mex. Fitopatol.]]></source>
<year>2003</year>
<volume>21</volume>
<page-range>365-70</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alvarado-Gómez]]></surname>
<given-names><![CDATA[O. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Rocha-Peña]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Silva-Vara]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez-Soriano]]></surname>
<given-names><![CDATA[J. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[R. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Rivera-Bustamante]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Ruíz-Beltrán]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Citrus exocortis and citrus cachexia in commercial groves of Tahiti lime in México]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Yokomi]]></surname>
<given-names><![CDATA[R. K.]]></given-names>
</name>
<name>
<surname><![CDATA[J. V. da]]></surname>
<given-names><![CDATA[Graça]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[R.F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Proc. 14th Conf. Int. Org. Citrus Virol.]]></source>
<year>2000</year>
<page-range>289-93</page-range><publisher-loc><![CDATA[Riverside, California ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ben-Shaul]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Guang]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Mogilner]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Hadas]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Mawassi]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Gafny]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Bar-Joseph]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Genomic diversity among populations of two viroids from different graft-transmissible dwarfing complexes in Israel]]></article-title>
<source><![CDATA[Phytopathology]]></source>
<year>1995</year>
<volume>85</volume>
<page-range>359-64</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Garnsey]]></surname>
<given-names><![CDATA[S. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Zies]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Irey]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Sieburth]]></surname>
<given-names><![CDATA[P. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Semancik]]></surname>
<given-names><![CDATA[J. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Levy]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Hilf]]></surname>
<given-names><![CDATA[M. E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Practical field detection of Florida citrus viroids by RT-PCR]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Milne]]></surname>
<given-names><![CDATA[R. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Durán-Vila]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Graça]]></surname>
<given-names><![CDATA[J. V. da]]></given-names>
</name>
</person-group>
<source><![CDATA[Proc. 15th Conf. Int. Org. Citrus Virol.]]></source>
<year>2002</year>
<page-range>219-29</page-range><publisher-loc><![CDATA[Riverside, California ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Igloi]]></surname>
<given-names><![CDATA[G. L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A silver stain for the detection of nanogram amounts of tRNA following two-dimensional electrophoresis]]></article-title>
<source><![CDATA[Ann. Biochem.]]></source>
<year>1983</year>
<volume>134</volume>
<page-range>184-8</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ito]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Ieki]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Ozaki]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Simultaneous detection of six citrus viroids and apple stem grooving virus from citrus plants by multiplex reverse transcription polymerase chain reaction]]></article-title>
<source><![CDATA[J. Virol. Meth.]]></source>
<year>2002</year>
<volume>106</volume>
<page-range>235-9</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Levy]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Haididi]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Garnsey]]></surname>
<given-names><![CDATA[S. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reversetranscription-polymerase chain reaction assays for the rapid detection of citrus viroides using multiplex primer sets]]></article-title>
<source><![CDATA[Proc. Int. Soc. Citruculture]]></source>
<year>1992</year>
<volume>7</volume>
<page-range>800-3</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Müller]]></surname>
<given-names><![CDATA[G. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Targon]]></surname>
<given-names><![CDATA[M. L. P. N.]]></given-names>
</name>
<name>
<surname><![CDATA[Medina]]></surname>
<given-names><![CDATA[C. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Carvalho]]></surname>
<given-names><![CDATA[S. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Stuchi]]></surname>
<given-names><![CDATA[E. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Nunes]]></surname>
<given-names><![CDATA[W. M. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Machado]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Viroids in commercial Tahiti lime orchards in Sao Paulo, Brazil]]></article-title>
<source><![CDATA[Program, and Abstract Book.16th Conf. Int. Org. Citrus Virol.]]></source>
<year>2004</year>
<publisher-loc><![CDATA[Monterrey, Nuevo León. México ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ochoa]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[La Rosa]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Albanese]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Tessitori]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Fuggetta]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Survey of citrus viroids in Venezuela]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[da Graça]]></surname>
<given-names><![CDATA[J. V.]]></given-names>
</name>
<name>
<surname><![CDATA[Moreno]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Yokomi]]></surname>
<given-names><![CDATA[R. K.]]></given-names>
</name>
</person-group>
<source><![CDATA[Proc. 13th Conf. Int. Org. Citrus Virol.]]></source>
<year>1996</year>
<page-range>354-6</page-range><publisher-loc><![CDATA[Riverside, California ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pagliano]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Peyrou]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Campo]]></surname>
<given-names><![CDATA[R. Del]]></given-names>
</name>
<name>
<surname><![CDATA[Orlando]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Gravina]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Wettstein]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Francis]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Detection and characterization of citrus viroids in Uruguay]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Yokomi]]></surname>
<given-names><![CDATA[R. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Graça]]></surname>
<given-names><![CDATA[J. V. da]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[R. F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Proc. 14th Conf. Int. Org. Citrus Virol.]]></source>
<year>2000</year>
<page-range>282-8</page-range><publisher-loc><![CDATA[Riverside, California ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Palacio-Bielsa]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Foissac]]></surname>
<given-names><![CDATA[X.]]></given-names>
</name>
<name>
<surname><![CDATA[Duran-Vila]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Indexing of citrus viroids by imprint hybridization]]></article-title>
<source><![CDATA[Eur. J. Plant Pathol.]]></source>
<year>1999</year>
<volume>105</volume>
<page-range>897-903</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Puchta]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Ramm]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Luckinger]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Hadas]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Bar-Joseph]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Sanger]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Primary and secondary structure of citrus viroid IV (CVdIV), a new quimeric viroid present in dwarfed trees in Israel]]></article-title>
<source><![CDATA[Nucleic Acid Res.]]></source>
<year>1991</year>
<volume>19</volume>
<page-range>6640</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Reanwarakorn]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Semancik]]></surname>
<given-names><![CDATA[J. S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Correlation of hop stunt viroid variants to cachexia and xyloporosis diseases of citrus]]></article-title>
<source><![CDATA[Phytopathology]]></source>
<year>1999</year>
<volume>89</volume>
<page-range>568-74</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rivera-Bustamante]]></surname>
<given-names><![CDATA[R. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Gin]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Semancik]]></surname>
<given-names><![CDATA[J. S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Enhanced resolution of circular and linear molecular forms of viroid and viroid-like RNA by electrophoresis in a discontinuous-pH system]]></article-title>
<source><![CDATA[Anal. Biochem.]]></source>
<year>1986</year>
<volume>156</volume>
<page-range>91-5</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Robles-Serna]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Presencia de exocortis en los cítricos de Tamaulipas]]></article-title>
<source><![CDATA[Resúmenes XII Congreso Nacional de Fitopatología]]></source>
<year>1985</year>
<publisher-loc><![CDATA[Guanajuato, México ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rocha-Peña]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Byerly-Murphy]]></surname>
<given-names><![CDATA[K. F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Manejo integrado de la Tristeza de los cítricos: Escenario potencial en México]]></article-title>
<source><![CDATA[Memorias 1er Simposio Internacional Protección Fitosanitaria]]></source>
<year>1998</year>
<page-range>157-78</page-range><publisher-loc><![CDATA[Hermosillo, Sonora. México ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rocha-Peña]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez-Soriano]]></surname>
<given-names><![CDATA[J. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Byerly-Murphy]]></surname>
<given-names><![CDATA[K. F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Viroides de cítricos: Amenaza oculta para la citricultura de México]]></article-title>
<source><![CDATA[Rev. Mex. Fitopatol.]]></source>
<year>1995</year>
<volume>13</volume>
<page-range>146-9</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Roistacher]]></surname>
<given-names><![CDATA[C. N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The cachexia and xyloporosis diseases of citrus: A review]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Timmer]]></surname>
<given-names><![CDATA[L. W.]]></given-names>
</name>
<name>
<surname><![CDATA[Garnsey]]></surname>
<given-names><![CDATA[S. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Navarro]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Proc. 10th Conf. Int. Org. Citrus Virol.]]></source>
<year>1988</year>
<page-range>116-23</page-range><publisher-name><![CDATA[Riverside, California]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Roistacher]]></surname>
<given-names><![CDATA[C. N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Graft -transmissible diseases of citrus]]></article-title>
<source><![CDATA[Handbook for Detection and Diagnosis]]></source>
<year>1991</year>
<page-range>115-20</page-range><publisher-name><![CDATA[International Organization of Citrus Virologist. FAO. Rome]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sánchez-Salas]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Robles-Serna]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[González-Garza]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Ocurrencia de exocortis de los cítricos en el Estado de Nuevo León y su efecto en una combinación patrón-injerto susceptible]]></article-title>
<source><![CDATA[Proc. Tropical Region Amer. Soc. Hort. Sci.]]></source>
<year>1979</year>
<volume>23</volume>
<page-range>75-8</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sambrook]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Fritsch]]></surname>
<given-names><![CDATA[E. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Maniatis]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Molecular Cloning: A Laboratory Manual]]></source>
<year>1989</year>
<edition>2</edition>
<publisher-loc><![CDATA[N. Y. ]]></publisher-loc>
<publisher-name><![CDATA[Cold Spring Harbor Laboratory Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sieburth]]></surname>
<given-names><![CDATA[P. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Irey]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Garnsey]]></surname>
<given-names><![CDATA[S. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Owens]]></surname>
<given-names><![CDATA[R. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The use of RT-PCR in the Florida citrus viroid indexing program]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Milne]]></surname>
<given-names><![CDATA[R. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Durán-Vila]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Graça]]></surname>
<given-names><![CDATA[J. V. da]]></given-names>
</name>
</person-group>
<source><![CDATA[Proc. 15th Conf. Int. Org. Citrus Virol.]]></source>
<year>2002</year>
<page-range>230-9</page-range><publisher-name><![CDATA[Riverside, California]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tessitori]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[La Rosa]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Albanese]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Catara]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[PCR diagnosis of citrus viroids in field samples]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[da Graça]]></surname>
<given-names><![CDATA[J. V.]]></given-names>
</name>
<name>
<surname><![CDATA[Moreno]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Yokomi]]></surname>
<given-names><![CDATA[R. K.]]></given-names>
</name>
</person-group>
<source><![CDATA[Proc.13th Conf. Int. Org. Citrus Virol.]]></source>
<year>1996</year>
<page-range>230-5</page-range><publisher-loc><![CDATA[Riverside, California ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yang]]></surname>
<given-names><![CDATA[X.]]></given-names>
</name>
<name>
<surname><![CDATA[Haididi]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Garnsey]]></surname>
<given-names><![CDATA[S. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Enzymatic amplification of citrus exocortis and cachexia viroids from infected citrus hosts]]></article-title>
<source><![CDATA[Phytopathology]]></source>
<year>1992</year>
<volume>82</volume>
<page-range>279-85</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
