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Xylem formation can be modeled statistically as a function of primary growth and cambium activity

Huang Jian‐Guo, Deslauriers Annie et Rossi Sergio. (2014). Xylem formation can be modeled statistically as a function of primary growth and cambium activity. New Phytologist, 203, (3), p. 831-841.

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URL officielle: http://dx.doi.org/doi:10.1111/nph.12859

Résumé

Primary (budburst, foliage and shoot) growth and secondary (cambium and xylem) growth of plants play a vital role in sequestering atmospheric carbon. However, their potential relationships have never been mathematically quantified and the underlying physiological mechanisms are unclear. We monitored primary and secondary growth in Picea mariana and Abies balsamea on a weekly basis from 2010 to 2013 at four sites over an altitudinal gradient (25-900 m) in the eastern Canadian boreal forest. We determined the timings of onset and termination through the fitted functions and their first derivative. We quantified the potential relationships between primary growth and secondary growth using the mixed-effects model. We found that xylem formation of boreal conifers can be modeled as a function of cambium activity, bud phenology, and shoot and needle growth, as well as species- and site-specific factors. Our model reveals that there may be an optimal mechanism to simultaneously allocate the photosynthetic products and stored nonstructural carbon to growth of different organs at different times in the growing season. This mathematical link can bridge phenological modeling, forest ecosystem productivity and carbon cycle modeling, which will certainly contribute to an improved prediction of ecosystem productivity and carbon equilibrium.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:0028-646X
Volume:203
Numéro:3
Pages:p. 831-841
Version évaluée par les pairs:Oui
Date:2014
Identifiant unique:10.1111/nph.12859
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
Unités de recherche > Centre de recherche sur la Boréalie (CREB)
Mots-clés:boreal forest, ecosystem, mixed-effects model, phenology, primary growth, secondary growth, tree growth, xylem formation
Déposé le:26 mai 2023 14:12
Dernière modification:26 mai 2023 14:12
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