CAMPOY, José Antonio; RUIZ, David; NORTES, M.D; EGEA, José

doi:10.1111/j.1438-8677.2012.00636.x

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CAMPOY, José Antonio
Unité de recherches Espèces Fruitières et Vigne [UREFV]
Consejo Superior de Investigaciones Cientificas [España] = Spanish National Research Council [Spain] [CSIC]

RUIZ, David
Consejo Superior de Investigaciones Cientificas [España] = Spanish National Research Council [Spain] [CSIC]

NORTES, M.D
Consejo Superior de Investigaciones Cientificas [España] = Spanish National Research Council [Spain] [CSIC]

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Article de revue

Ce document a été publié dans

Plant Biology. 2013, vol. 15, p. 28-35

Wiley

Résumé en anglais

Our aim was to assess the possible differential effect of increasing temperatures due to global warming on dormancy progression in apricot. The effect of a range of chilling temperatures on vegetative and reproductive bud dormancy progression in excised shoots was examined during two seasons. Temperature treatments were applied in different dormant stages to evaluate the possible interaction of date × temperature for dormancy release in apricot. During sampling, chill accumulated in the field ranged from 0 to 49 chill portions (CPs), corresponding to 0–100% of the chilling requirement (CR) of the apricot selection Z505-2. Forcing conditions were applied after a 60-day chill treatment on each sampling date, and rate to budbreak (1/mean time to bud break: MTB−1) was established in vegetative (terminal and lateral) and reproductive buds to determine depth of dormancy. Results showed that the stage of dormancy has a strong influence on the effect of different temperatures on dormancy progression in apricot. For the first time, a non-linear effect of different chilling temperatures during the dormancy cycle in apricot was obtained, especially in the superior range of temperatures traditionally considered to release dormancy. Thus, introduction of this differential effect could help to improve the models to estimate dormancy release in the context of climate change.< Réduire

Mots clés

Prunus armeniaca, L.

Mots clés en anglais

dormancy

chilling efficiency

climate change

modelling

temperature