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Boletín de la Sociedad Argentina de Botánica

versão On-line ISSN 1851-2372

Resumo

NEGRIN, Vanesa Lorena  e  ZALBA, Sergio Martín. Germination of Grindelia ventanensis (Asteraceae), an endemic species from the Ventania Mountains (Buenos Aires). Bol. Soc. Argent. Bot. [online]. 2008, vol.43, n.3-4, pp.261-267. ISSN 1851-2372.

In this paper the potential for sexual propagation of Grindelia ventanensis (Asteraceae) is evaluated. It is an endemic shrub of Ventania Mountains (Buenos Aires province) considered critically endangered and with potential economic value as ornamental species. Percentage and media term of germination of seeds were estimated from cultivated and wild populations, exposed and not exposed to cold conditions, and the effect of storage on these variables was determined. Percentage of germination of seeds from wild populations was greater (67%) than that of seeds from cultivated populations (16%), and no effect of cold was detected. Changes in the media term of germination were neither detected when considering the origin of seeds nor the application of cold. Time of storage tested (nine to ten months) significantly reduced the percentage of germination and increased its media term. Reduction in the percentage of germination associated with storage could be result of a loss of viability or an induction of a secondary dormancy. Our results indicate that G. ventanensis is a species with a good potential for its cultivation from seeds. This knowledge could contribute to the conservation of this species.

Palavras-chave : Native plants; Ornamental; Germination; Endemic; Ex-situ conservation.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )

 

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