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Synchronisms between bud and cambium phenology in black spruce : Early-flushing provenances exhibit early xylem formation

Perrin Magali, Rossi Sergio et Isabel Nathalie. (2017). Synchronisms between bud and cambium phenology in black spruce : Early-flushing provenances exhibit early xylem formation. Tree Physiology, 37, (5), p. 593-603.

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URL officielle: http://dx.doi.org/doi:10.1093/treephys/tpx019

Résumé

Bud and cambial phenology represent the adaptation of species to the local environment that allows the growing season to be maximized while minimizing the risk of frost for the developing tissues. The temporal relationship between the apical and radial meristems can help in the understanding of tree growth as a whole process. The aim of this study was to compare cambial phenology in black spruce (Picea mariana (Mill.) B.S.P.) provenances classified as early and late bud flushing. The different phases of cambial phenology were assessed on wood microcores sampled weekly from April to October in 2014 and 2015 from 61 trees growing in a provenance trial in Quebec, Canada. Trees showing an early bud flush also exhibited early reactivation of xylem differentiation, although an average difference of 12 days for buds corresponded to small although significant differences of 4 days for xylem. Provenances with early bud flush had an early bud set and completed xylem formation earlier than late bud flush provenances. No significant difference in the period of xylem formation and total growth was observed between the flushing classes. Our results demonstrate that the ecotype differentiation of black spruce provenances represented by the phenological adaptation of buds to the local climate corresponds to specific growth dynamics of the xylem.

Type de document:Article publié dans une revue avec comité d'évaluation
Volume:37
Numéro:5
Pages:p. 593-603
Version évaluée par les pairs:Oui
Date:2017
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 break, bud set, cell differentiation, meristem, secondary wall formation
Informations complémentaires:This is a pre-copyedited, author-produced version of an article accepted for publication in Tree Physiology following peer review. The version of record: Perrin, M., Rossi, S., & Isabel, N. (2017). Synchronisms between bud and cambium phenology in black spruce: Early-flushing provenances exhibit early xylem formation. Tree Physiology, 37(5), 593-603 is available online at: doi: 10.1093/treephys/tpx019.
Déposé le:24 août 2017 13:21
Dernière modification:24 août 2017 13:21
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