<?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>0187-7151</journal-id>
<journal-title><![CDATA[Acta botánica mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Act. Bot. Mex]]></abbrev-journal-title>
<issn>0187-7151</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Ecología A.C., Centro Regional del Bajío]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-71512024000100101</article-id>
<article-id pub-id-type="doi">10.21829/abm131.2024.2146</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto de la edad de las semillas en la germinación y la supervivencia de plántulas de Lophophora diffusa (Cactaceae)]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of seed age on germination, and seedling survival of Lophophora diffusa (Cactaceae)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Briseño-Sánchez]]></surname>
<given-names><![CDATA[Ma. Isabel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Nava-Osorio]]></surname>
<given-names><![CDATA[Jade]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas-Aréchiga]]></surname>
<given-names><![CDATA[Mariana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mandujano]]></surname>
<given-names><![CDATA[María C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional autónoma de México Instituto de Ecología Departamento de Ecología de la Biodiversidad]]></institution>
<addr-line><![CDATA[Cd. Mx. ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<numero>131</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-71512024000100101&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-71512024000100101&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-71512024000100101&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes y Objetivos:  La capacidad de formar un banco de semillas es una de las estrategias que permite la regeneración poblacional de especies en ambientes impredecibles. El fotoblastismo positivo, la longevidad ecológica, el tamaño de la semilla y mecanismos de latencia suelen ser atributos de las semillas que forman bancos. En este estudio evaluamos el efecto de la edad de las semillas en la germinación y supervivencia de Lophophora diffusa, una cactácea de la región del Semidesierto Queretano-Hidalguense, con el objetivo de reconocer su potencial para formar un banco de semillas.  Métodos:  Se desarrolló un diseño experimental teniendo como factor la edad de las semillas, con semillas colectadas el año que se realizó el experimento (2018) y semillas de cuatro años (colectadas en 2014). Se registró la germinación y la supervivencia de las plántulas en 15 tiempos de observación cada tercer día. Los resultados de germinación se analizaron mediante un modelo de &#8220;tiempo al evento&#8221; con un ajuste de función log-logística y se realizó una prueba de t para determinar diferencias entre los parámetros estimados. Los resultados de supervivencia se analizaron mediante un modelo lineal generalizado con distribución de error binomial y función de enlace-logit.  Resultados clave:  Aunque las semillas de mayor edad presentaron un tiempo medio de germinación superior en comparación con las de menor edad, la edad de las semillas no afectó la germinación, ni la supervivencia de las plántulas. Las semillas estudiadas permanecen viables en condiciones de laboratorio hasta cuatro años, con porcentajes de germinación y supervivencia &gt;50% independientemente de la edad de las semillas.  Conclusiones:  La capacidad de las semillas de mantenerse viables hasta por cuatro años en condiciones de laboratorio, sumada a las características morfológicas y fisiológicas conocidas para esta especie, indican su potencial de formar un banco de semillas persistente de corto plazo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background and Aims: The ability to form a seed bank is one of the strategies that allow the population regeneration of species in unpredictable environments. Positive photoblastism, ecological longevity, seed size and dormancy mechanisms are usually attributes of seeds that are able to form a seed bank. In this study, we evaluated the effect of seed age on germination and survival of Lophophora diffusa, a cactus endemic of the Queretaro-Hidalgo semidesertic region, with the objective to identify their potential to form a seed bank.  Methods: An experimental design was developed taking seed age as a factor, with seeds collected in the year the experiment was conducted (2018), and four-year-old seeds (collected in 2014). Germination and seedling survival were recorded at 15 observation times every third day. Germination results were analyzed using an "event-time" model with a log-logistic function fit, and a t-test was performed to determine differences between the estimated parameters. Survival results were analyzed using a generalized linear model with binomial error distribution and logit-link function.  Key results: Although older seeds had a higher mean germination time compared to recently dispersed seeds, seed age did not affect germination and seedling survival. Studied seeds remained viable under laboratory conditions up to four years, with germination and survival percentages &gt;50% regardless of seed age.  Conclusions:  The ability of seeds to remain viable for up to four years under laboratory conditions, together with the morphological and physiological characteristics known for this species, indicate its potential to form a short-term persistent seed bank.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[banco de semillas]]></kwd>
<kwd lng="es"><![CDATA[cactáceas]]></kwd>
<kwd lng="es"><![CDATA[peyote]]></kwd>
<kwd lng="es"><![CDATA[prueba t 50]]></kwd>
<kwd lng="es"><![CDATA[viabilidad]]></kwd>
<kwd lng="en"><![CDATA[cactus]]></kwd>
<kwd lng="en"><![CDATA[peyote]]></kwd>
<kwd lng="en"><![CDATA[seed bank]]></kwd>
<kwd lng="en"><![CDATA[test t 50]]></kwd>
<kwd lng="en"><![CDATA[viability]]></kwd>
</kwd-group>
</article-meta>
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