IMBIV   05474
INSTITUTO MULTIDISCIPLINARIO DE BIOLOGIA VEGETAL
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Drier and Hotter. Drought and heat-shock stress effects on germination of native mountain tree species.
Autor/es:
HENSEN ISABELL; CACERES YOLANDA ; MARCORA PAULA INÉS
Lugar:
Ghent
Reunión:
Congreso; British Ecological Society Annual Miting; 2017
Institución organizadora:
British Ecological Society
Resumen:
Altitudinal distribution and abundance of some plant species may be associated with variations in seed germinability between different habitats due to environmental and anthropogenic limitations. Seed germination is a crucial event in a plant's life cycle.Because temperature and water availability are important regulators of seed germination, this process will likely be influenced by global warming. Of particular concern are potential decreases in native tree seed regeneration associated with climate-induced physiological stress and complex interactions with other anthropogenic-mediated disturbances such as fires.Our main questions were: How drought and heat-shock stress affect germinationtraits of native tree species in Central Argentina? Are these effects dependent on populations origins across the species altitudinal distribution gradient?Our preliminary results showed that seed germination is influenced by altitudedrought interaction and heat-shock alone. Even moderate intensity fires and low soil moisture could negatively affect germination and likely recruitment of native tree species. Evidenced effects highlight the potential population specific and species-specific responses which could be used for in-situ and ex-situ conservation plans and predicting the species?response to environmentalchanges.