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Coordination between growth, phenology and carbon storage in three coexisting deciduous tree species in a temperate forest.
Klein, Tamir; Vitasse, Yann; Hoch, Günter.
Afiliación
  • Klein T; Institute of Botany, University of Basel, Schönbeinstrasse 6, 4056 Basel, Switzerland; Present address: Institute of Soil, Water and Environmental Sciences, ARO Volcani Center, Beit Dagan 50250, Israel tamirkl@volcani.agri.gov.il.
  • Vitasse Y; Institute of Geography, University of Neuchatel, 2000 Neuchatel, Switzerland; Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), 2000 Neuchatel, Switzerland; Group Mountain Ecosystems, Institute for Snow and Avalanche Research (SLF), 7620 Davos, Switzerland;
  • Hoch G; Institute of Botany, University of Basel, Schönbeinstrasse 6, 4056 Basel, Switzerland;
Tree Physiol ; 36(7): 847-55, 2016 07.
Article en En | MEDLINE | ID: mdl-27126226
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.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Estaciones del Año / Bosques / Meristema / Betulaceae / Fagus / Quercus / Metabolismo de los Hidratos de Carbono Idioma: En Revista: Tree Physiol Asunto de la revista: BOTANICA / FISIOLOGIA Año: 2016 Tipo del documento: Article País de afiliación: Israel Pais de publicación: Canadá
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Estaciones del Año / Bosques / Meristema / Betulaceae / Fagus / Quercus / Metabolismo de los Hidratos de Carbono Idioma: En Revista: Tree Physiol Asunto de la revista: BOTANICA / FISIOLOGIA Año: 2016 Tipo del documento: Article País de afiliación: Israel Pais de publicación: Canadá