Dussert Stéphane, Chabrillange Nathalie, Engelmann Florent, Anthony François, Louarn Jacques, Hamon Serge. (2000). Relationship between seed desiccation sensitivity, seed water content at maturity and climatic characteristics of native environments of nine Coffea L. species. In :
Workshop on desiccation tolerance and sensitivity of seeds and vegetative plant tissues. Seed Science Research, 10 (3), p. 293-300. Desiccation Tolerance and Sensitivity of Seeds and Vegetative Plant Tissues : International Workshop, 3. ISSN 0960-2585.
Titre du document
Relationship between seed desiccation sensitivity, seed water content at maturity and climatic characteristics of native environments of nine Coffea L. species
Année de publication
2000
Auteurs
Dussert Stéphane, Chabrillange Nathalie, Engelmann Florent, Anthony François, Louarn Jacques, Hamon Serge
In
Workshop on desiccation tolerance and sensitivity of seeds and vegetative plant tissues
Source
Seed Science Research, 2000,
10 (3), p. 293-300 ISSN 0960-2585
Colloque
Desiccation Tolerance and Sensitivity of Seeds and Vegetative Plant Tissues : International Workshop, 3.
A broad variability for seed desiccation sensitivity, as quantified by the water content and the water activity at which half of the initial viability is lost, has been previously observed within nine African coffee species. In order to investigate if these different degrees of desiccation sensitivity correspond to an adaptive trait, additional data, such as the duration of seed development and seed water content at maturity, were measured for these species, and the relationships between these parameters and some climatic characteristics of their specific native environments were investigated. Since flowering in all coffee species occurs only a few days after the main rainfall marking the end of the dry season, simulations could be made, based on the continuous sequences of rainfall data compiled in databases of nine climatic stations, chosen for their appropriate location in the collecting areas. The simulations revealed a highly significant correlation between the duration of seed development and that of the wet season. Consequently, mature seeds are shed at the beginning of the following dry season. Moreover, the mean number of dry months that seeds have to withstand after shedding was significantly correlated with the parameters used to quantify seed desiccation sensitivity. By contrast, seed moisture content at maturity was not correlated with the level of seed desiccation tolerance. All these results are discussed on the basis of more detailed descriptions of the natural habitats of the coffee species studied. (Résumé d'auteur)
Plan de classement
Mécanismes physiologique et biochimiques des plantes [076PHYBIO]
Descripteurs
CAFE ; GRAINE ; DESSICCATION ; CLIMAT ; SECHERESSE ; COMPOSITION CHIMIQUE ; CYCLE DE DEVELOPPEMENT ; TOLERANCE ; STATISTIQUE PARAMETRIQUE ; ETUDE EXPERIMENTALE
Description Géographique
ETHIOPIE ; CAMEROUN ; CENTRAFRIQUE ; BANGUI ; KENIA ; MOMBASA ; COTE D'IVOIRE ; TANZANIE ; MOROGORO
Localisation
Fonds IRD [F B010023556] ;
Montpellier (Centre IRD)
Identifiant IRD
fdi:010023556
