Fulltext

Coordination between growth, phenology and carbon storage in three coexisting deciduous tree species in a temperate forest

Klein, Tamir ; Vitasse, Yann ; Hoch, Günter ; Tognetti, Roberto ; Tognetti, Roberto

In: Tree Physiology, 2016, vol. 36, no. 7, p. 847-855

Ajouter à la liste personnelle
    Titre
    • Coordination between growth, phenology and carbon storage in three coexisting deciduous tree species in a temperate forest
    Auteur
    • Klein, Tamir. Institute of Botany, University of Basel, Schönbeinstrasse 6, 4056 Basel, Switzerland
    • Vitasse, Yann. Institute of Geography, University of Neuchatel, 2000 Neuchatel, Switzerland
    • Hoch, Günter. Institute of Botany, University of Basel, Schönbeinstrasse 6, 4056 Basel, Switzerland
    • Tognetti, Roberto. 1 Institute of Botany, University of Basel, Schönbeinstrasse 6, 4056 Basel, Switzerland
    • Tognetti, Roberto. 1 Institute of Botany, University of Basel, Schönbeinstrasse 6, 4056 Basel, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Tree Physiology, 2016, vol. 36, no. 7, p. 847-855. Oxford University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:331454
    Summary
    In deciduous trees growing in temperate forests, bud break and growth in spring must rely on intrinsic carbon (C) reserves. Yet it is unclear whether growth and C storage occur simultaneously, and whether starch C in branches is sufficient for refoliation. To test in situ the relationships between growth, phenology and C utilization, we monitored stem growth, leaf phenology and stem and branch nonstructural carbohydrate (NSC) dynamics in three deciduous species: Carpinus betulus L., Fagus sylvatica L. and Quercus petraea (Matt.) Liebl. To quantify the role of NSC in C investment into growth, a C balance approach was applied. Across the three species, >95% of branchlet starch was consumed during bud break, confirming the importance of C reserves for refoliation in spring. The C balance calculation showed that 90% of the C investment in foliage (7.0-10.5 kg tree−1 and 5-17 times the C needed for annual stem growth) was explained by simultaneous branchlet starch degradation. Carbon reserves were recovered sooner than expected, after leaf expansion, in parallel with stem growth. Carpinus had earlier leaf phenology (by ∼25 days) but delayed cambial growth (by ∼15 days) than Fagus and Quercus, the result of a competitive strategy to flush early, while having lower NSC levels.