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Strobilus and seed production of Dioon edule (Zamiaceae) in a population with low seedling density in San Luis Potosí, Mexico

dc.contributor.authorYáñez Espinosa, Laura
dc.contributor.authorFlores Rivas, Joel David
dc.date.accessioned2018-03-23T19:26:03Z
dc.date.available2018-03-23T19:26:03Z
dc.date.issued2013
dc.identifier.citationStrobilus and Seed Production of Dioon Edule (Zamiaceae) in a Population with low Seedling Density in San Luis Potosí, Mexico Raymundo Mora, Laura Yáñez-Espinosa, Joel Flores, Nadya Nava-Zárate Tropical Conservation Science https://doi.org/10.1177/194008291300600208 First Published June 1, 2013
dc.identifier.urihttp://hdl.handle.net/11627/3661
dc.description.abstract"We describe strobilus and seed development in a Dioon edule (chamal, palma, dameu') population characterized by low seedling and high adult tree density, in order to improve conservation decisions for this endangered cycad species. Female strobili required 16-17 months and male 4-5 months to develop. During this period 80% female and 100% male strobili were not damaged by herbivores. The method of cone analysis used to evaluate seed production of pines was modified for D. edule, providing actual yield of individual strobili compared to potential seed yield, explaining productivity in terms of seed efficiency, and identifying and quantifying the types of seed failures. Larger strobili have higher seed potential calculated as the number of seeds potentially produced in the fertile megasporophylls of each strobilus, total seeds actually produced, and seeds with an embryo (filled). Calculated average seed potential per strobilus was of 230.4 seeds. Using the X-ray technique, average seed traits were 100.2 full, 1.8 insect damaged, and 0.6 malformed. Seed efficiency (number of filled seeds as a percentage of the seed potential of each strobilus) of 42.5% indicated that major seed loss was attributable to abortive ovules and seeds, possibly due to ineffective pollination. Seedling survival in greenhouse conditions was 100% after one year. Low seed production affects the population structure and hinders its conservation."
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectCycads
dc.subjectSeed production
dc.subjectCone analysis
dc.subjectStrobili
dc.subjectX-ray analysis
dc.subject.classificationCIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA
dc.titleStrobilus and seed production of Dioon edule (Zamiaceae) in a population with low seedling density in San Luis Potosí, Mexico
dc.typearticle
dc.identifier.doihttps://doi.org/10.1177/194008291300600208
dc.rights.accessAcceso Abierto


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Attribution-NonCommercial-NoDerivatives 4.0 Internacional
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