Germinacio?n de las semillas del madron?o (Arbutus unedo L., Ericaceae).
DOI:
https://doi.org/10.24310/abm.v28i0.7267Abstract
RESUMEN. Germinación de las semillas del madroño (Arbutus unedo L., Ericaceae). Se han estudiado algunos factores ecológicos que pueden afectar a la germinación de las semillas de Arbutus unedo realizando los siguientes tratamientos 1) estratificación a 4°C, 2) choque térmico simulando el efecto del fuego, 3) escarificación en ácido sulfúrico simulando el paso por el tracto digestivo de los dispersantes y 4) efecto de la pulpa del fruto. El tratamiento con ácido sulfúrico no afectó ni a la capacidad ni a la velocidad de germinación de las semillas. Los restantes tratamientos afectaron negativamente a la germinación, siendo este efecto especialmente drástico en el tratamiento con pulpa de fruto donde no germinó ninguna semilla. Los resultados sugieren que la pulpa del fruto inhibe la germinación, que las semillas pueden ser efectivamente dispersadas por endozoocoria y que no resisten el paso de un incendio.
Palabras clave: Arbutus unedo, Ericaceae, Germinación de semillas, Viabilidad de semillas, madroño.
SUMMARY. Seed germination of Arbutus unedo L. (Ericaceae). Some ecological factors that could affect seed germination of Arbutus unedo have been studied. The following treatments were applied, 1) cold stratification (4°C), 2) thermal shock simulating fire effect, 3) Sulfuric scarification simulating the pass through digestive tract of dispersers, and 4) effect of the fruit pulp. Sulfuric did not affect the germination capacity nor germination velocity. The remainder treatments diminished germination capacity; no germination was observed in the seeds treated with fruit pulp. Results suggest that fruit pulp inhibits seed germination, and that seeds could be effectively dispersed by endozoochory and are damaged by fire.
Key words: Arbutus unedo, Ericaceae, seed germination, seed viability, strawberry tree.
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