<?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>0120-2812</journal-id>
<journal-title><![CDATA[Acta Agronómica]]></journal-title>
<abbrev-journal-title><![CDATA[Acta Agron.]]></abbrev-journal-title>
<issn>0120-2812</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-28122012000200003</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Producción de quistosoros de Spongospora subterranea (Walk.) Lagerh f. sp. subterranea Tomlinson durante un ciclo de cultivo de papa en tres tipos de suelo]]></article-title>
<article-title xml:lang="en"><![CDATA[Production of cystosori of Spongospora subterranea (Walk.) Lagerh f. sp. subterranea Tomlinson during a potato crop cycle in three soil types]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Pérez]]></surname>
<given-names><![CDATA[Wilmar]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gilchrist-Ramelli]]></surname>
<given-names><![CDATA[Elizabeth]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reynaldi]]></surname>
<given-names><![CDATA[Sebastián]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Nacional de Colombia Departamento de Ciencias Agronómicas Grupo BioDes]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Helmholtz Centre for Environmental Research - UFZ Department Bioanalytical Ecotoxicology ]]></institution>
<addr-line><![CDATA[Leipzig ]]></addr-line>
<country>Germany</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2012</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2012</year>
</pub-date>
<volume>61</volume>
<numero>2</numero>
<fpage>111</fpage>
<lpage>116</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-28122012000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-28122012000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-28122012000200003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[La sarna polvosa es causada por el protista Spongospora subterranea (Walk.) Lagerh f. sp. subterranea Tomlinson, un parásito obligado el cual replica en raíces y tubérculos de papa (Solanum tuberosum). Esta replicación resulta en estructuras de resistencia denominadas quistosoros. En este estudio se investigó la producción de quistosoros en papa variedad Diacol Capiro, cultivada en tres tipos de suelos: Inceptisol, Entisol, y Andisol, infestados con quistosoros. La concentración de este parásito se determinó en el suelo a la siembra (inicial), a la senescencia de las plantas (cosecha) y dos meses más tarde, cuando las plantas estaban desintegradas (poscosecha). El diseño experimental fue completamente al azar con dos tratamientos y tres niveles cada uno. Un tratamiento fue el tipo de suelo con los niveles Inceptisol, Entisol y Andisol; y el otro, el tiempo de muestreo con los niveles Inicial, Cosecha y Poscosecha. Adicionalmente, se realizó un ensayo de regresión simple para analizar la correlación de la concentración inicial y final de quistosoros. En todos los tipos de suelo la concentración aumentó (48%) (P < 0.05) desde el inicio a la poscosecha. No se observaron diferencias (P < 0.05) en la concentración de quistosoros entre los suelos durante los muestreos realizados. La concentración final de estos (poscosecha) se correlacionó (P < 0.05) con la concentración inicial (inicio). Estos resultados sugieren que la concentración de quistosoros puede sufrir un incremento significativo en un solo ciclo de cultivo de papa en todos los suelos estudiados y que los residuos de cosecha como tubérculos infectados pueden contribuir a este incremento.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[The powdery scab is caused by the protist Spongospora subterranea (Walk.) Lagerh f. sp. subterranea Tomlinson, which is an obligate parasite that replicates in roots and tubers of potato (Solanum tuberosum). This replication results in resistant structures which are denominated cystosori. Production of cystosori was investigated in the potato variety Diacol Capiro, which was cultivated in three types of soil (Inceptisol, Entisol, and Andisol) that were infested with cystosori. Concentration of cystosori was determined at planting (Initial), at plant senescence (Harvest), and at plant disintegration (Postharvest). The experimental design was completely randomized with two treatments and three levels each. Soil type with the levels Inceptisol, Entisol and Andisol, was one treatment; and the sampling time with the initial, harvest and postharvest, was the other. Additionally, a test of simple regression to analyze correlation of the initial and final concentration of cystosori was performed. In all types of soil, cystosori concentration increased significantly (P < 0.05) from planting to postharvest; the mean increase was 48%. There was no significant (P < 0.05) difference among types of soil at any time sampling. The final concentration of cystosori (Postharvest) was significantly (P < 0.05) which correlated with the initial concentration of cystosori (Initial). These results suggest that cystosori concentration can have a substantial increase after a single potato crop cycle, and harvest residuals, such as contaminated tubers, can contribute to this increase.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Papa]]></kwd>
<kwd lng="es"><![CDATA[quistosoros]]></kwd>
<kwd lng="es"><![CDATA[sarna polvosa]]></kwd>
<kwd lng="es"><![CDATA[Solanum sp.]]></kwd>
<kwd lng="es"><![CDATA[Spongospora subterranea (Walk.) Lagerh f. sp. subterranea Tomlinson]]></kwd>
<kwd lng="es"><![CDATA[tipos de suelo]]></kwd>
<kwd lng="en"><![CDATA[Cystosori]]></kwd>
<kwd lng="en"><![CDATA[potato]]></kwd>
<kwd lng="en"><![CDATA[powdery scab]]></kwd>
<kwd lng="en"><![CDATA[soil types]]></kwd>
<kwd lng="en"><![CDATA[Solanum sp]]></kwd>
<kwd lng="en"><![CDATA[Spongospora subterranea (Walk.) Lagerh f. sp. subterranea Tomlinson.]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  ]]></body><back>
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