<?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>S0185-33092024000300007</article-id>
<article-id pub-id-type="doi">10.18781/r.mex.fit.2403-1</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Hoja pequeña de Bocconia frutescens, nueva enfermedad asociada a una raza relacionada a &#8216;Candidatus Phytoplasma pruni&#8217; en Costa Rica]]></article-title>
<article-title xml:lang="en"><![CDATA[Bocconia frutescens little leaf, a new plant disease associated to a ´Candidatus Phytoplasma pruni´ related strain in Costa Rica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villalobos Muller]]></surname>
<given-names><![CDATA[William]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Garita Salazar]]></surname>
<given-names><![CDATA[Laura]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Conejo Barboza]]></surname>
<given-names><![CDATA[Ana María]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sandoval Carvajal]]></surname>
<given-names><![CDATA[Izayana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Montero Astúa]]></surname>
<given-names><![CDATA[Mauricio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moreira Carmona]]></surname>
<given-names><![CDATA[Lisela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Universidad de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<volume>42</volume>
<numero>3</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-33092024000300007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-33092024000300007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-33092024000300007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Objetivo/Antecedentes. Bocconia frutescens (Papaveraceae) es un árbol pequeño, distribuido naturalmente desde México hasta Argentina y en la cuenca del Cari be. Árboles de Bocconia con síntomas semejantes a los inducidos por fitoplasmas, como hoja pequeña y escobas de bruja, fueron encontrados en la provincia de Car tago, Costa Rica. Detectar e identificar al posible fitoplasma asociado con dichos síntomas fue el objetivo de este estudio.  Materiales y Métodos. Se evaluó tejido foliar empleando microscopia electrónica de transmisión (TEM), PCR anidada empleando cebadores universales y especí ficos para amplificar los genes ARNr 16S, y secA de fitoplasmas. Las secuencias nucleotídicas (método Sanger) obtenidas de los amplicones, se emplearon para BLASTn, análisis filogenéticos y RFLP&#8217;s in silico.  Resultados. La presencia de fitoplasmas en el tejido del floema se observó me diante TEM solamente en los árboles sintomáticos. Los diferentes análisis con las secuencias parciales (genes 16Sr y secA) indicaron la presencia de una cepa rela cionada al ´Candidatus Phytoplasma pruni´ en las muestras evaluadas.  Conclusión. Fitoplasmas se encontraron sólo en los árboles sintomáticos de Boc conia evaluados. Los fitoplasmas se identificaron como una cepa relacionada al ´Ca. Phytoplasma pruni´. Este es el primer reporte de B. frutescens como un hospe dero natural de ´Ca. Phytoplasma pruni´.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Objective/Background. Bocconia frutescens (Papaveraceae) is a small tree distributed naturally from Mexico to Argentina and the Caribbean Bassin. Bocconia trees showing symptoms resembling phytoplasmas infection, such as little leaves and witches´-broom, were found in Cartago province, Costa Rica. Detection and identification of the potential phytoplasmas associated with B. frutescens little leaf symptoms was the objective out of this study.  Materials and Methods. Evaluation of leaves tissue using transmission electron microscopy (TEM), nested PCR using universal and specific primers to amplify phytoplasmas 16S rRNA and secA genes. Nucleotidic sequences (Sanger method) were obtained from amplicons, and used for BLASTn, phylogenetic analyses, and in silico RFLP&#8217;s.  Results. Presence of phytoplasmas into phloem tissue, only in symptomatic trees, was evidenced by TEM. Comparison of partial sequences (16Sr and secA genes) by BLASTn, in silico RFLP´s and phylogenetic analyses, showed the occurrence of a ´Candidatus Phytoplasma pruni´ related strain in the samples evaluated.  Conclusion. Phytoplasmas were found only in the symptomatic B. frutescens trees evaluated. The phytoplasmas were identified as a ´Ca. Phytoplasma pruni´ related strain. This is the first report of B. frutescens as a natural host of ´Ca. Phytoplasma pruni´.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Papaveraceae]]></kwd>
<kwd lng="es"><![CDATA[PCR semi-anidado]]></kwd>
<kwd lng="es"><![CDATA[RFLP&#8217;s in silico]]></kwd>
<kwd lng="es"><![CDATA[16SrIII-F]]></kwd>
<kwd lng="es"><![CDATA[gen secA]]></kwd>
<kwd lng="en"><![CDATA[Papaveraceae]]></kwd>
<kwd lng="en"><![CDATA[semi-nested PCR]]></kwd>
<kwd lng="en"><![CDATA[in silico RFLP&#8217;s]]></kwd>
<kwd lng="en"><![CDATA[16SrIII-F]]></kwd>
<kwd lng="en"><![CDATA[secA gene]]></kwd>
</kwd-group>
</article-meta>
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