Variación en el grosor de la testa en semillas de especies leñosas distribuidas en el bosque seco ecuatoriano

Abstract

Abstract: The seed coat is a multifunctional structure involved in embryo protection and germination processes. Therefore, in this study on the variation of seed coat thickness in woody species of the Ecuadorian dry forest, 38 species from 17 families were examined. The objectives were to determine seed coat thickness variation, identify grouping patterns based on this feature, and assess its influence on seed germination and seedling survival. For this purpose, 10 healthy seeds per species were selected and divided into two groups: one of dry seeds and another of imbibed seeds. A cross-sectional cut was made on each seed to measure seed coat thickness, and statistical analysis was performed to compare differences between species and groups. The results showed significant differences between species and groups, with the average seed coat thickness being greater in imbibed seeds. Overall, these findings contribute to the morphological understanding of seed coats in woody species of the dry forest in the Tumbesian region.