Horizon / Plein textes La base de ressources documentaires de l'IRD

IRD

Publications des scientifiques de l'IRD

Chamorro D., Luna B., Ourcival J. M., Kavgaci A., Sirca C., Mouillot Florent, Arianoutsou M., Moreno J. M. (2017). Germination sensitivity to water stress in four shrubby species across the Mediterranean Basin. Plant Biology, 19 (1), 23-31. ISSN 1435-8603

Accès réservé (Intranet IRD) Document en accès réservé (Intranet IRD)

Lien direct chez l'éditeur doi:10.1111/plb.12450

Titre
Germination sensitivity to water stress in four shrubby species across the Mediterranean Basin
Année de publication2017
Type de documentArticle référencé dans le Web of Science WOS:000389890300004
AuteursChamorro D., Luna B., Ourcival J. M., Kavgaci A., Sirca C., Mouillot Florent, Arianoutsou M., Moreno J. M.
SourcePlant Biology, 2017, 19 (1), p. 23-31. ISSN 1435-8603
RésuméMediterranean shrublands are generally water-limited and fire-driven ecosystems. Seed-based post-fire regeneration may be affected by varying rainfall patterns, depending on species sensitivity to germinate under water stress. In our study, we considered the germination response to water stress in four species from several sites across the Mediterranean Basin. Seeds of species with a hard coat (Cistus monspeliensis, C.salviifolius, Cistaceae, Calicotome villosa, Fabaceae) or soft coat (Erica arborea, Ericaceae), which were exposed or not to a heat shock and smoke (fire cues), were made to germinate under water stress. Final germination percentage, germination speed and viability of seeds were recorded. Germination was modelled using hydrotime analysis and correlated to the water balance characteristics of seed provenance. Water stress was found to decrease final germination in the three hard-seeded species, as well as reduce germination speed. Moreover, an interaction between fire cues and water stress was found, whereby fire cues increased sensitivity to water stress. Seed viability after germination under water stress also declined in two hard-seeded species. Conversely, E.arborea showed little sensitivity to water stress, independent of fire cues. Germination responses varied among populations of all species, and hydrotime parameters were not correlated to site water balance, except in E.arborea when not exposed to fire cues. In conclusion, the species studied differed in germination sensitivity to water stress; furthermore, fire cues increased this sensitivity in the three hard-seeded species, but not in E.arborea. Moreover, populations within species consistently differed among themselves, but these differences could only be related to the provenance locality in E.arborea in seeds not exposed to fire cues.
Plan de classementSciences du monde végétal [076] ; Etudes, transformation, conservation du milieu naturel [082]
Descr. géo.ESPAGNE ; FRANCE ; TUNISIE ; ITALIE ; GRECE ; TURQUIE ; ZONE MEDITERANEENNNE
LocalisationFonds IRD [F B010068772]
Identifiant IRDfdi:010068772
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010068772

Export des données

Disponibilité des documents

Télechargment fichier PDF téléchargeable

Lien sur le Web lien chez l'éditeur

Accès réservé en accès réservé

HAL en libre accès sur HAL


Accès aux documents originaux :

Le FDI est labellisé CollEx

Accès direct

Bureau du chercheur

Site de la documentation

Espace intranet IST (accès réservé)

Suivi des publications IRD (accès réservé)

Mentions légales

Services Horizon

Poser une question

Consulter l'aide en ligne

Déposer une publication (accès réservé)

S'abonner au flux RSS

Voir les tableaux chronologiques et thématiques

Centres de documentation

Bondy

Montpellier (centre IRD)

Montpellier (MSE)

Nouméa

Papeete

Niamey

Ouagadougou

Tunis

La Paz

Quito