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Synchronisms and correlations of spring phenology between apical and lateral meristems in two boreal conifers

Antonucci Serena, Rossi Sergio, Deslauriers Annie, Lombardi Fabio, Marchetti Marco et Tognetti Roberto. (2015). Synchronisms and correlations of spring phenology between apical and lateral meristems in two boreal conifers. Tree Physiology, 35, (10), p. 1086-1094.

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URL officielle: http://dx.doi.org/doi:10.1093/treephys/tpv077

Résumé

Phenological synchronisms between apical and lateral meristems could clarify some aspects related to the physiological relationships among the different organs of trees. This study correlated the phenological phases of bud development and xylem differentiation during spring 2010-14 in balsam fir (Abies balsamea Mill.) and black spruce [(Picea mariana Mill. (BSP)] of the Monts-Valin National Park (Quebec, Canada) by testing the hypothesis that bud development occurs after the reactivation of xylem growth. From May to September, we conducted weekly monitoring of xylem differentiation using microcores and bud development with direct observations on terminal branches. Synchronism between the beginning of bud development and xylem differentiation was found in both species with significant correlations between the phases of bud and xylem phenology. Degree-day sum was more appropriate in assessing the date of bud growth resumption, while thermal thresholds were more suitable for cambium phenology. Our results provide new knowledge on the dynamics of spring phenology and novel information on the synchronisms between two meristems in coniferous trees. The study demonstrates the importance of precisely defining the phases of bud development in order to correctly analyse the relationships with xylem phenology.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:0829-318X
Volume:35
Numéro:10
Pages:p. 1086-1094
Version évaluée par les pairs:Oui
Date:Septembre 2015
Sujets:Sciences naturelles et génie > Sciences appliquées > Foresterie et sciences du bois
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:balsam fir, black spruce, bud break, cambium, temperature, xylogenesis, Picea mariana, Abies balsamea
Informations complémentaires:This is a pre-copyedited, author-produced PDF of an article accepted for publication in Tree Physiology following peer review. The version of record "Antonucci S, Rossi S, Deslauriers A, Lombardi F, Marchetti M et Tognetti R. 2015. Synchronisms and correlations of spring phenology between apical and lateral meristems in two boreal conifers. Tree Physiology, 35 : 1086-1094" is available online at: http://dx.doi.org/doi:10.1093/treephys/tpv077
Déposé le:08 juin 2016 17:31
Dernière modification:05 déc. 2016 20:28
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