Self-incompatibility, floral parameters, and pollen characterization in the narrow endemic and threatened species Artemisia granatensis (Asteraceae)

Anales del Jardín Botánico de Madrid

María Angélica Taisma¹  Francisca Alba-Sánchez²  Juan Lorite²  Julio Peñas² 

[1] Instituto de Biología Experimental, Centro de Botánica Tropical, Universidad Central de Venezuela;Plant Conservation Unit, Department of Botany, University of Granada;

关键词: reproductive biology;    pollen-tube growth;    endemic and threatened species;    conservation;   

DOI  :  10.3989/ajbm.2276

来源: DOAJ

【 摘 要 】

Artemisia granatensis Boiss. is a paradigmatic species for plant conservation in Spain and Europe. It is a critically endangered (CR) endemic species growing above 2500 m in the Sierra Nevada (southern Spain). Natural populations have been considerably devastated in the past due to intensive human exploitation for folk medicine. The sparse available data concerning the reproductive biology of this species under natural conditions indicate a low reproductive success. To provide additional information on the reproductive biology of A. granatensis, and consequently information useful for the management and conservation of this species, we studied the breeding system through pollen-tube growth. In addition, some floral and pollen traits were recorded. No differences were found between populations in terms of the morphological traits of flowers and inflorescences. A. granatensis is an anemophilous species, and the data indicate that pollen transfer may be limited between isolated populations, and so contributing to an extremely low fruit-set. Results show A. granatensis is selfincompatible, probably with a sporophytic self-incompatibility system, and with no evidence of partial self-incompatibility. Reproductive traits, related to pollen morphology and settling speed may explain the low rate of recruitment in the small populations separated by geographical barriers.

【 授权许可】

Unknown