> GOPS 2012 action
Key-words : Desiccation tolerance, Ecosystem, Flora, Seed
Geographic area : New Caledonia
Issues : Seeds assure plant survival when environmental conditions are adverse, and their dispersal so as to colonize new sites. Their tolerance to abiotic constraints required by the environment when they are separated from their mother-plant and from the fruit is therefore essential for species maintenance and evolution within an ecosystem.
Syzygium multipetalum mature fruits in the scrubland, on ultramafic rocks.
Expected results and deliverables : The aims of this project are to acquire physiological data related to desiccation tolerance of seeds belonging to species from contrasting ecosystems and to study the level of sensibility to desiccation of seeds from varied vegetation units in relation to the characteristic of their original biotope.
The final target of this program forms the basis of a database called DESSICAL that will group the results on the seed physiological behaviour, its taxonomical classification and the ecological characteristics of the ecosystems in which it grows.
This database will be expanded in the future through the addition of new species. Over time, DESSICAL would permit to clarify whether the seed's ability to tolerate a certain grade of desiccation plays a role in the identification of the species community structure and in the maintenance of species coexistence in some habitats
Contact and GOPS partners :
Seed germination test after desiccation in thel IRD-Nouméa greenhouse.