<?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>2007-4298</journal-id>
<journal-title><![CDATA[Botanical Sciences]]></journal-title>
<abbrev-journal-title><![CDATA[Bot. sci]]></abbrev-journal-title>
<issn>2007-4298</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Botánica de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-42982019000100089</article-id>
<article-id pub-id-type="doi">10.17129/botsci.2018</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[The biosynthesis of pharmacologically active compounds in Calophyllum brasiliense seedlings is influenced by calcium and potassium under hydroponic conditions]]></article-title>
<article-title xml:lang="es"><![CDATA[La biosíntesis de compuestos farmacológicamente activos en plántulas de Calophyllum brasiliense está influenciada por el calcio y el potasio en condiciones hidropónicas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castillo-Arellano]]></surname>
<given-names><![CDATA[Jorge Ivan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Osuna-Fernández]]></surname>
<given-names><![CDATA[Helia Reyna]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mumbru-Massip]]></surname>
<given-names><![CDATA[Marius]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez-Cancino]]></surname>
<given-names><![CDATA[Rocío]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes-Chilpa]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,National University Autonomous of Mexico Faculty of Sciences ]]></institution>
<addr-line><![CDATA[Mexico City ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,University of Barcelona Faculty of Pharmacy ]]></institution>
<addr-line><![CDATA[Barcelona ]]></addr-line>
<country>Spain</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Technology University of Mixteca  ]]></institution>
<addr-line><![CDATA[Oaxaca ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,National University Autonomous of Mexico Institute of Chemistry ]]></institution>
<addr-line><![CDATA[Mexico City ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2019</year>
</pub-date>
<volume>97</volume>
<numero>1</numero>
<fpage>89</fpage>
<lpage>99</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-42982019000100089&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-42982019000100089&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-42982019000100089&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Background:  The influence of soil nutrients on biosynthesis of secondary metabolites from tropical trees has been poorly investigated.  Questions: Does the deprival of Ca2+ and K+ influence the production of pharmacologically active compounds in the seedling of Calophyllum brasiliense?  Species study: Calophyllum brasiliense Cambess.  Study site: Los Tuxtlas, Veracruz, Mexico; November 2005 to November 2009.  Methods: The seedlings were obtained from seeds and subjected to different hydroponic treatments: 1) modified Hoagland solution (MHS), 2) MHS-Ca2+, and 3) MHS-K+. Growth, height, foliar biomass, and HPLC analysis were performed after 7 months.  Results: Under hydroponic conditions Ca2+ and K+ deficiency induced the mortality of 53 % and 28 % of the seedlings, respectively. The foliar biomass, and plant height of the survivors were also drastically reduced. MHS-K+ treatment induced a 15, 4.2 and 4.3-fold decrease for calanolides B, C, and apetalic acid in the leaves, respectively. MHS-Ca2+ treatment induced a decrease of 4.3, and 2.4-fold for calanolide B, and C, respectively.  Conclusion: Ca2+ is essential for survival of C. brasiliense seedlings under hydroponic conditions, Ca2+ and K+ are critical for growth, foliar production, and biosynthesis of apetalic acid, and calanolide B.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes:  La influencia de los nutrientes del suelo en la biosíntesis de los metabolitos secundarios en árboles tropicales ha sido poco estudiada.  Preguntas: ¿La carencia de Ca2+ y K+ afecta la producción de compuestos farmacológicamente activos en plántulas de Calophyllum brasiliense?  Especie de estudio: Calophyllum brasiliense Cambess.  Sitio de estudio: Los Tuxtlas, Veracruz, México; noviembre de 2005 a noviembre de 2009.  Métodos: Las plántulas se obtuvieron a partir de semillas y se sometieron a diferentes tratamientos hidropónicos: 1) solución modificada de Hoagland (MHS), 2) MHS-Ca2+, y 3) MHS-K+. Se evaluó el crecimiento, peso, biomasa y análisis mediante HPLC después de 7 meses.  Resultados: La deficiencia de Ca2+ y K+ en condiciones hidropónicas indujo la mortalidad del 53 % y 28 % de las plántulas respectivamente. La biomasa foliar y la altura de las plántulas sobrevivientes se redujo. El tratamiento de MHS-K+ provocó una disminución de los calanólidos B, C, y del ácido apetálico de 15, 4.2 y 4.3 veces en las hojas respectivamente. El tratamiento de MHS-Ca2+ provocó una disminución de 4.3 y 2.4 veces para los calanólidos B y C respectivamente.  Conclusión: El Ca2+ es esencial para la supervivencia de las plántulas de C. brasiliense, el Ca2+ and K+ son importantes para el crecimiento, producción foliar y biosíntesis del ácido apetálico y el calanólido B.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Apetalic acid]]></kwd>
<kwd lng="en"><![CDATA[calanolides]]></kwd>
<kwd lng="en"><![CDATA[Calophyllum brasiliense]]></kwd>
<kwd lng="en"><![CDATA[hydroponic]]></kwd>
<kwd lng="en"><![CDATA[soil nutrients]]></kwd>
<kwd lng="es"><![CDATA[Ácido apetálico]]></kwd>
<kwd lng="es"><![CDATA[calanólidos]]></kwd>
<kwd lng="es"><![CDATA[Calophyllum brasiliense]]></kwd>
<kwd lng="es"><![CDATA[hidroponia]]></kwd>
<kwd lng="es"><![CDATA[nutrientes del suelo]]></kwd>
</kwd-group>
</article-meta>
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