<?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>1659-1321</journal-id>
<journal-title><![CDATA[Agronomía Mesoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Agron. Mesoam]]></abbrev-journal-title>
<issn>1659-1321</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1659-13212022000400003</article-id>
<article-id pub-id-type="doi">10.15517/am.v33iespecial.51283</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Perfil de vitamina E en semillas de variedades de arroz (Oryza sativa L.) cultivadas y comercializadas en Costa Rica]]></article-title>
<article-title xml:lang="en"><![CDATA[Vitamin E profile in rice (Oryza sativa L.) seeds grown and commercialized in Costa Rica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Conejo-López]]></surname>
<given-names><![CDATA[Valery]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barboza-Barquero]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Azofeifa-Delgado]]></surname>
<given-names><![CDATA[Álvaro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vargas-Ramírez]]></surname>
<given-names><![CDATA[Ester]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Irías-Mata]]></surname>
<given-names><![CDATA[Andrea]]></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>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>33</volume>
<numero>spe1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S1659-13212022000400003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S1659-13212022000400003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S1659-13212022000400003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Introducción. El arroz (Oryza sativa L.) es uno de los cereales más consumidos a nivel mundial, las subespecies índicas y japónicas son las más cultivadas. La vitamina E presente en el arroz posee alta actividad antioxidante que contribuye a extender la longevidad de sus semillas. Su cuantificación permite conocer el aporte nutricional respecto a esta vitamina. Objetivo. Analizar el perfil de vitamina E en semillas de las subespecies de arroz (O. sativa L.) índicas (comerciales registradas, aromáticas, promisorias en desarrollo) y japónicas, consumidas en Costa Rica. Materiales y métodos. Se analizaron veintisiete materiales cultivados en las regiones Chorotega y Brunca, Costa Rica, cosechados en 2020. Se cuantificó la vitamina E por cromatografía líquida de ultra-alta resolución acoplado a detección por masas de cuadrupolo triple con fuente de ionización química a presión atmosférica, en el Centro para Investigaciones en Granos y Semillas (CIGRAS), Universidad de Costa Rica, en 2021. Resultados. En el perfil de vitamina E se obtuvo un agrupamiento característico para las muestras japónicas, opuesto al presentado por las muestras índicas. Los compuestos mayoritarios fueron &#947;-tocotrienol, &#945;-tocoferol y &#947;-tocoferol, el rango de concentración total de vitamina E fue de 5,50 a 33,20 &#956;g g-1, donde la subespecie japónica fue la que reportó menor cantidad (6,30 &#8211; 8,80 &#956;g g-1), mientras que la muestra Nayuribe, perteneciente a la subespecie índica comercial registrada obtuvo la concentración más alta (33,20 ± 7,40 &#956;g g-1). Conclusión. Aunque las subvariedades analizadas son filogenéticamente de la misma especie, las diferencias significativas encontradas en el aporte nutricional de vitamina E pueden deberse a características intrínsecas de cada subespecie. El contenido significativamente alto de vitamina E de la muestra Nayuribe evidenció que es posible encontrar acervos para alto contenido de vitamina E entre las variedades analizadas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Introduction. Rice (Oryza sativa L.) is one of the most consumed cereals worldwide, the indica and japonica subspecies are the most cultivated. The vitamin E present in rice has a high antioxidant activity that contributes to extend the longevity of its seeds. Its quantification allows to know the nutritional contribution of this vitamin. Objective. To analyze the vitamin E profile in seeds of indica (registered commercial, aromatic, promising in development) and japonica subspecies of rice (O. sativa L.), consumed in Costa Rica. Materials and methods. Twenty-seven materials grown in the Chorotega and Brunca regions of Costa Rica, harvested in 2020 were analyzed. Vitamin E was quantified by ultra-high performance liquid chromatography coupled to triple quadrupole mass detection with chemical ionization source at atmospheric pressure at the Centro para Investigaciones en Granos y Semillas (CIGRAS), Universidad de Costa Rica, in 2021. Results. In the vitamin E profile, a characteristic clustering was obtained for the japonica samples, which was opposite to that presented by the indica samples. The majority compounds were &#947;-tocotrienol, &#945;-tocopherol, and &#947;-tocopherol, the range of total vitamin E concentration was 5.50 to 33.20 &#956;g g-1, where the japonica subspecies reported the lowest amount (6.30 &#8211; 8.80 &#956;g g-1), while the Nayuribe sample, belonging to the registered commercial indica subspecies, obtained the highest concentration (33.20 ± 7.40 &#956;g g-1). Conclusion. Although the analyzed subvarieties are phylogenetically from the same species, the significant differences found in the nutritional intake of vitamin E may be due to intrinsic characteristics of each subspecies. The significantly high vitamin E content in the Nayuribe sample showed that it is possible to find stocks for a high vitamin E content among the varieties analyzed.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[tocoferoles]]></kwd>
<kwd lng="es"><![CDATA[tocotrienoles]]></kwd>
<kwd lng="es"><![CDATA[semilla]]></kwd>
<kwd lng="es"><![CDATA[cromatografía]]></kwd>
<kwd lng="es"><![CDATA[validación]]></kwd>
<kwd lng="en"><![CDATA[tocopherols]]></kwd>
<kwd lng="en"><![CDATA[tocotrienols]]></kwd>
<kwd lng="en"><![CDATA[seed]]></kwd>
<kwd lng="en"><![CDATA[chromatography]]></kwd>
<kwd lng="en"><![CDATA[validation]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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