<?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>2730-5066</journal-id>
<journal-title><![CDATA[Agrociencia Uruguay]]></journal-title>
<abbrev-journal-title><![CDATA[Agrocienc. Urug.]]></abbrev-journal-title>
<issn>2730-5066</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Agronomía - Instituto de Nacional de Investigación Agropecuaria]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2730-50662025000101306</article-id>
<article-id pub-id-type="doi">10.31285/agro.29.1496</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Germination response of Erigeron sumatrensis (Retz.) seeds to drying and freezing]]></article-title>
<article-title xml:lang="es"><![CDATA[Respuesta de germinación de las semillas de Erigeron sumatrensis (Retz.) al secado y congelamiento]]></article-title>
<article-title xml:lang="pt"><![CDATA[Resposta de germinação das sementes de Erigeron sumatrensis (Retz.) à secagem e congelamento]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Condón]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Kaspary]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Investigación Agropecuaria (INIA) Unidad de Semillas y Recursos Fitogenéticos ]]></institution>
<addr-line><![CDATA[Colonia ]]></addr-line>
<country>Uruguay</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Investigación Agropecuaria (INIA) Departamento de Protección Vegetal ]]></institution>
<addr-line><![CDATA[Colonia ]]></addr-line>
<country>Uruguay</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<volume>29</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_arttext&amp;pid=S2730-50662025000101306&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_abstract&amp;pid=S2730-50662025000101306&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_pdf&amp;pid=S2730-50662025000101306&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Erigeron species form a complex of weed species that have evolved herbicide resistance in Uruguay. Genetic studies using seeds from different biotypes are frequently conducted to understand how this evolution occurred. However, these seeds are extremely small, and there is limited information available on their long-term conservation in germplasm banks. In this context, the aim of this study was to characterize drying strategies for long-term seed storage, comparing prolonged low-temperature drying (20 days at 20 °C, 15% RH) with shorter, higher-temperature drying (10 days at 40 °C or 7 days at 60 °C), and to assess seed germination responses to subsequent freezing (-20 °C for 30 days). The results showed that germination was not affected by any of the drying treatments. Moreover, freezing the seed batches increased germination, particularly in the more recently harvested seed lots (2020 and 2021), and especially when combined with drying at 60 °C. These findings indicate that E. sumatrensis seeds can be classified as orthodox and that long-term conservation in germplasm banks using standard drying and freezing protocols is feasible.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Las especies de Erigeron forman un complejo de malezas que han desarrollado resistencia a herbicidas en Uruguay. Con frecuencia se llevan a cabo estudios genéticos con semillas de diferentes biotipos para comprender cómo ocurrió esta evolución. Sin embargo, estas semillas son extremadamente pequeñas y existe información limitada sobre su conservación a largo plazo en bancos de germoplasma. En este contexto, el objetivo de este estudio fue caracterizar estrategias de secado para el almacenamiento prolongado de semillas, comparando un secado prolongado a baja temperatura (20 días a 20 °C, 15% HR) con secados más cortos a temperaturas más elevadas (10 días a 40 °C o 7 días a 60 °C), y evaluar las respuestas de germinación tras la congelación subsiguiente (-20 °C durante 30 días). Los resultados mostraron que la germinación no se vio afectada por ninguno de los tratamientos de secado. Además, la congelación de los lotes de semillas aumentó la germinación, especialmente en los lotes cosechados más recientemente (2020 y 2021), y sobre todo cuando se combinó con el secado a 60 °C. Estos hallazgos indican que las semillas de E. sumatrensis pueden clasificarse como ortodoxas, y que la conservación a largo plazo en bancos de germoplasma, utilizando protocolos estándar de secado y congelación, es factible.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo: Espécies de Erigeron formam um complexo de plantas daninhas que desenvolveram resistência a herbicidas no Uruguai. Estudos genéticos com sementes de diferentes biótipos são freqüentemente realizados para entender como essa evolução ocorreu. No entanto, essas sementes são extremamente pequenas, e há informações limitadas sobre sua conservação de longo prazo em bancos de germoplasma. Nesse contexto, o objetivo deste estudo foi caracterizar estratégias de secagem para armazenamento de sementes a longo prazo, comparando uma secagem prolongada em baixa temperatura (20 dias a 20 °C, 15% UR) com secagens mais curtas em temperaturas mais altas (10 dias a 40 °C ou 7 dias a 60 °C) e avaliar as respostas de germinação após congelamento subseqüente (-20 °C por 30 dias). Os resultados mostraram que a germinação não foi afetada por nenhum dos tratamentos de secagem. Além disso, o congelamento dos lotes de sementes aumentou a germinação, principalmente nos lotes colhidos mais recentemente (2020 e 2021), e especialmente quando combinado com a secagem a 60 °C. Esses achados indicam que as sementes de E. sumatrensis podem ser classificadas como ortodoxas, e que a conservação de longo prazo em bancos de germoplasma, utilizando protocolos padrão de secagem e congelamento, é viável.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[orthodox seeds]]></kwd>
<kwd lng="en"><![CDATA[long-term seed storage]]></kwd>
<kwd lng="en"><![CDATA[genebank conservation]]></kwd>
<kwd lng="en"><![CDATA[seed dormancy]]></kwd>
<kwd lng="en"><![CDATA[weed biology]]></kwd>
<kwd lng="es"><![CDATA[semillas ortodoxas]]></kwd>
<kwd lng="es"><![CDATA[almacenamiento a largo plazo de semillas]]></kwd>
<kwd lng="es"><![CDATA[conservación en bancos de germoplasma]]></kwd>
<kwd lng="es"><![CDATA[dormancia de semillas]]></kwd>
<kwd lng="es"><![CDATA[biología de malezas]]></kwd>
<kwd lng="pt"><![CDATA[sementes ortodoxas]]></kwd>
<kwd lng="pt"><![CDATA[armazenamento de sementes a longo prazo]]></kwd>
<kwd lng="pt"><![CDATA[conservação em bancos de germoplasma]]></kwd>
<kwd lng="pt"><![CDATA[dormência de sementes]]></kwd>
<kwd lng="pt"><![CDATA[biologia de plantas daninhas]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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