<?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>0187-5779</journal-id>
<journal-title><![CDATA[Terra Latinoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Terra Latinoam]]></abbrev-journal-title>
<issn>0187-5779</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de la Ciencia del Suelo A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-57792019000400449</article-id>
<article-id pub-id-type="doi">10.28940/terra.v37i4.541</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Influence of the growing conditions on the flavonoids and phenolic acids accumulation in amaranth (Amaranthus hypochondriacus L.) leaves]]></article-title>
<article-title xml:lang="es"><![CDATA[Influencia de las condiciones de crecimiento en la acumulación de flavonoids y ácidos fenólicos en hojas de amaranto (Amaranthus hypochondriacus L.)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barba de la Rosa]]></surname>
<given-names><![CDATA[Ana P.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[León-Rodríguez]]></surname>
<given-names><![CDATA[Antonio de]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Laursen]]></surname>
<given-names><![CDATA[Bente]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fomsgaard]]></surname>
<given-names><![CDATA[Inge S.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Potosino de Investigación Científica y Tecnológica  ]]></institution>
<addr-line><![CDATA[San Luis Potosí San Luis Potosí]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Aarhus University Faculty of Science and Technology Department of Agroecology]]></institution>
<addr-line><![CDATA[Slagelse ]]></addr-line>
<country>Denmark</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>37</volume>
<numero>4</numero>
<fpage>449</fpage>
<lpage>457</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792019000400449&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792019000400449&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792019000400449&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[SUMMARY: Phytochemicals or phenolic compounds are important natural bioactive molecules that plants accumulate in response to environmental conditions and may exert beneficial effects on health by protecting humans against many diseases. The aim of this work was to analyze the influence of biotic and abiotic stress on the accumulation of flavonoids and phenolic acids on leaves of two cultivars of Amaranthus hypochondriacus, which are differentiated by the colour of their leaves (red or green). Phenolic compounds were extracted using the accelerated solvent extraction (ASE) method and their identification was carried out by LC-MS analysis. Rutin was the main flavonoid in amaranth leaves; the highest concentrations were found in green leaves when plants were subjected to stress (9715 &#956;g g-1). Phenolic acids were minor compounds; ferulic acid was only present in red leaves (0.5 &#956;g g-1) and p-coumaric acid only in green leaves (0.7 &#956;g g-1). Our results indicate that leaves from A. hypochondriacus, the main species that produce edible seeds, are a good source of phytochemical compounds and their accumulation could be driven by the growing conditions.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN: Los fitoquímicos o compuestos fenólicos son importantes moléculas bioactivas naturales que las plantas acumulan en respuesta a las condiciones ambientales y que pueden ejercen efectos benéficos para la salud protegiendo a los humanos de muchas enfermedades. El objetivo de este trabajo fue analizar la influencia del estrés biótico y abiótico en la acumulación de flavonoides y ácidos fenólicos en las hojas de dos cultivares de Amaranthus hypochondriacus diferenciadas por el color de sus hojas (rojas y verdes). Los compuestos fenólicos fueron extraídos empleando la extracción de solvente acelerado (ESA) y analizados mediante LC-MS. La rutina fue el principal flavonoide en hojas de amaranto; las más altas concentraciones se encontraron en la especie de hoja verde cuando las plantas fueron sometidas a estrés (9715 &#956;g g-1). Los ácidos fenólicos fueron los compuestos minoritarios; el ácido ferúlico sólo se encontró en hojas rojas (0.5 &#956;g g&#8209;1) y el ácido p-cumárico solo en hojas verdes (0.7 &#956;g g-1). Los resultados indican que las hojas de A. hypochondriacus, la principal especie productora de semillas comestibles, son una fuente rica de compuestos fitoquímicos y su acumulación podría ser dirigida por las condiciones de cultivo.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[abiotic stress]]></kwd>
<kwd lng="en"><![CDATA[accelerated solvent extraction]]></kwd>
<kwd lng="en"><![CDATA[biotic stress]]></kwd>
<kwd lng="en"><![CDATA[electrospray mass spectrometry]]></kwd>
<kwd lng="en"><![CDATA[high performance liquid chromatography]]></kwd>
<kwd lng="en"><![CDATA[phenolic compounds]]></kwd>
<kwd lng="es"><![CDATA[estrés abiótico]]></kwd>
<kwd lng="es"><![CDATA[extracción acelerada con solvente]]></kwd>
<kwd lng="es"><![CDATA[estrés biótico]]></kwd>
<kwd lng="es"><![CDATA[electrospray espectrometría de masas]]></kwd>
<kwd lng="es"><![CDATA[cromatografía líquida de alta resolución]]></kwd>
<kwd lng="es"><![CDATA[compuestos fenólicos]]></kwd>
</kwd-group>
</article-meta>
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