<?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>2007-1132</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias forestales]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. forestales]]></abbrev-journal-title>
<issn>2007-1132</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11322023000100143</article-id>
<article-id pub-id-type="doi">10.29298/rmcf.v14i75.1297</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Calidad de semilla y crecimiento de planta en poblaciones y altitudes de Pinus hartwegii Lindl]]></article-title>
<article-title xml:lang="en"><![CDATA[Seed quality and plant growth in populations and altitudes of Pinus hartwegii Lindl]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez Mendoza]]></surname>
<given-names><![CDATA[José Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez Casas]]></surname>
<given-names><![CDATA[Marcos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez Herrera]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Viveros Viveros]]></surname>
<given-names><![CDATA[Héctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Veracruzana Instituto de Investigaciones Forestales ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2023</year>
</pub-date>
<volume>14</volume>
<numero>75</numero>
<fpage>143</fpage>
<lpage>165</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11322023000100143&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11322023000100143&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11322023000100143&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La reproducción y el crecimiento de especies de alta montaña adaptadas a bajas temperaturas, podrían afectarse por el calentamiento global, particularmente en altitudes marginales donde el estrés es más intenso. En este estudio se evaluó la calidad de semilla y el crecimiento inicial en varios gradientes altitudinales de tres poblaciones (dos del Estado de México y una de Veracruz) de Pinus hartwegii, donde las semillas se recolectaron entre 3 400 y 4 100 msnm. El diseño experimental fue completamente al azar y se registraron datos de germinación de semillas, rompimiento del estado cespitoso y crecimiento de plantas. La capacidad germinativa de las semillas fue de 87 %, con valor pico de 3.2 y germinativo de 10.9, pero con variación significativa entre poblaciones y gradientes. La menor capacidad germinativa (50 %) se obtuvo con semillas procedentes del mayor gradiente altitudinal (4 100 m). El rompimiento del estado cespitoso varió según la población y altitud. Respecto a las plántulas de Veracruz, 75 % de ellas rompieron el estado cespitoso a los cinco meses de edad, en contraste con las del Estado de México, cuyo registro fue menor a 35 %. Referente a la altitud, las plantas procedentes del mayor intervalo prolongaron el rompimiento del estado cespitoso por más de dos meses, lo cual influyó en el bajo crecimiento inicial de las plantas. Lo anterior indica que la población de 4 000 m podría estar en declinación, a diferencia de los otros gradientes altitudinales que mostraron excelente calidad de semillas y crecimiento de plantas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Reproduction and growth of high mountain species adapted to low temperatures could be affected by global warming, particularly at marginal altitudes where stress is more intense. This study evaluated seed quality and initial growth in various altitudinal gradients of three Pinus hartwegii populations (two in the State of Mexico and one in Veracruz State); seeds were collected between 3 400 and 4 100 masl. The experimental design was completely randomized and data on seed germination, cespitose stage breakage, and plant growth were recorded. Seed germination capacity was 87 %, with a peak value of 3.2 and germination of 10.9, but with significant variation among populations and gradients. The lowest germination capacity (50 %) was obtained with seeds from the highest altitudinal gradient (4 100 m). The breakage of the cespitose stage varied according to population and altitude. Regarding the seedlings from Veracruz, 75 % of them broke the cespitose stage at five months of age, in contrast with those from the State of Mexico, where the percentage was below 35 %. Regarding altitude, the plants from the highest interval prolonged the break of the cespitose stage for more than two months, which influenced the low initial growth of the plants. This indicates that the 4 000 m population may be in decline, unlike the other altitudinal gradients, which exhibited excellent seed quality and plant growth.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Alta montaña]]></kwd>
<kwd lng="es"><![CDATA[caracteres adaptativos]]></kwd>
<kwd lng="es"><![CDATA[estado cespitoso]]></kwd>
<kwd lng="es"><![CDATA[gradiente altitudinal]]></kwd>
<kwd lng="es"><![CDATA[parámetros germinativos]]></kwd>
<kwd lng="es"><![CDATA[reproducción]]></kwd>
<kwd lng="en"><![CDATA[High mountain]]></kwd>
<kwd lng="en"><![CDATA[adaptive traits]]></kwd>
<kwd lng="en"><![CDATA[cespitose stage]]></kwd>
<kwd lng="en"><![CDATA[altitudinal gradient]]></kwd>
<kwd lng="en"><![CDATA[germination parameters]]></kwd>
<kwd lng="en"><![CDATA[reproduction]]></kwd>
</kwd-group>
</article-meta>
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