Título

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

Autor

LAURA YAÑEZ ESPINOSA

JOEL DAVID FLORES RIVAS

Nivel de Acceso

Acceso Abierto

Licencia

http://creativecommons.org/licenses/by-nc-nd/4.0

Identificador alterno

doi: https://doi.org/10.1177/194008291300600208

Materias

Cycads - (AUTOR) Seed production - (AUTOR) Cone analysis - (AUTOR) Strobili - (AUTOR) X-ray analysis - (AUTOR) CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA - (CTI)

Resumen o descripción

"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."

Fecha de publicación

2013

Tipo de publicación

Artículo

Versión de la publicación

Versión publicada

Recurso de información

http://ipicyt.repositorioinstitucional.mx/jspui/handle/1010/1293

Formato

application/pdf

Idioma

Inglés

Audiencia

Público en general

Sugerencia de citación

Strobilus 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

Repositorio Orígen

Repositorio IPICYT

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