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Bud break responds more strongly to daytime than night-time temperature under asymmetric experimental warming

Rossi Sergio et Isabel Nathalie. (2017). Bud break responds more strongly to daytime than night-time temperature under asymmetric experimental warming. Global Change Biology, 23, (1), p. 446-454.

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URL officielle: http://dx.doi.org/doi:10.1111/gcb.13360

Résumé

Global warming is diurnally asymmetric, leading to a less-cold, rather than warmer, climate. We investigated the effects of asymmetric experimental warmings on plant phenology by testing the hypothesis that daytime warming is more effective in advancing bud break than nighttime warming. Bud break was monitored daily in Picea mariana seedlings belonging to 20 provenances from Eastern Canada and subjected to daytime and nighttime warmings in growth chambers at temperatures varying between 8 and 16 °C. The higher advancements of bud break and shorter times required to complete the phenological phases occurred with daytime warming. Seedlings responded to nighttime warming, but still with less advancement of bud break than under daytime warming. No advancement was observed when nighttime warming was associated to a daytime cooling. The effect of the treatments was uniform across provenances. Our observations realized under controlled conditions allowed to experimentally demonstrate that bud break can advance under nighttime warming, but to a lesser extent than under daytime warming. Prediction models using daily time scales could neglect the diverging influence of asymmetric warming and should be recalibrated for higher temporal resolutions.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:13541013
Volume:23
Numéro:1
Pages:p. 446-454
Version évaluée par les pairs:Oui
Date:2017
Identifiant unique:10.1111/gcb.13360
Sujets:Sciences naturelles et génie > Sciences naturelles > Biologie et autres sciences connexes
Département, module, service et unité de recherche:Départements et modules > Département des sciences fondamentales
Mots-clés:bud burst, climate change, ecotype, maximum temperature, minimum temperature, Picea mariana, phenology
Informations complémentaires:This is the peer reviewed version of the following article: Rossi S et Isabel N. 2017. Bud break responds more strongly to daytime than night-time temperature under asymmetric experimental warming. Global Change Biology, 23 : 446-454, which has been published in final form at http://dx.doi.org/doi:10.1111/gcb.13360. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Déposé le:19 avr. 2017 21:39
Dernière modification:19 avr. 2017 21:39
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