Web of Science: 24 citas, Scopus: 23 citas, Google Scholar: citas
Seasonal variability of foliar photosynthetic and morphological traits and drought impacts in a Mediterranean mixed forest
Sperlich, Dominik (Centre de Recerca Ecològica i Aplicacions Forestals)
Chang, C. T. (Centre de Recerca Ecològica i Aplicacions Forestals)
Peñuelas, Josep (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
Gracia, Carles (Centre de Recerca Ecològica i Aplicacions Forestals)
Sabaté i Jorba, Santi (Centre de Recerca Ecològica i Aplicacions Forestals)

Fecha: 2015
Resumen: The Mediterranean region is a hot spot of climate change vulnerable to increased droughts and heat waves. Scaling carbon fluxes from leaf to landscape levels is particularly challenging under drought conditions. We aimed to improve the mechanistic understanding of the seasonal acclimation of photosynthesis and morphology in sunlit and shaded leaves of four Mediterranean trees (Quercus ilex L. , Pinus halepensis Mill. , Arbutus unedo L. and Quercus pubescens Willd. ) under natural conditions. Vc,max and Jmax were not constant, and mesophyll conductance was not infinite, as assumed in most terrestrial biosphere models, but varied significantly between seasons, tree species and leaf position. Favourable conditions in winter led to photosynthetic recovery and growth in the evergreens. Under moderate drought, adjustments in the photo/biochemistry and stomatal/mesophyllic diffusion behaviour effectively protected the photosynthetic machineries. Severe drought, however, induced early leaf senescence mostly in A. unedo and Q. pubescens, and significantly increased leaf mass per area in Q. ilex and P. halepensis. Shaded leaves had lower photosynthetic potentials but cushioned negative effects during stress periods. Species-specificity, seasonal variations and leaf position are key factors to explain vegetation responses to abiotic stress and hold great potential to reduce uncertainties in terrestrial biosphere models especially under drought conditions.
Nota: Número d'acord de subvenció EC/FP7/238366
Nota: Número d'acord de subvenció EC/FP7/610028
Nota: Número d'acord de subvenció MINECO/CGL2011-30590-C02-01
Nota: Número d'acord de subvenció MICINN/CSD2008-00040
Nota: Número d'acord de subvenció MICINN/CGL2006-01293
Nota: Número d'acord de subvenció AGAUR/2014/SGR-274
Derechos: Tots els drets reservats
Lengua: Anglès.
Documento: article ; recerca ; acceptedVersion
Materia: Abiotic stress ; Arbutus unedo ; Jmax ; Leaf position ; Leaf traits ; Pinus halepensis ; Quercus ilex ; Quercus pubescens ; Seasonality ; Vc,max
Publicado en: Tree physiology, Vol. 35 issue 5 (May 2015) p. 501-520, ISSN 0829-318X

DOI: 10.1093/treephys/tpv017

33 p, 990.2 KB

11 p, 914.1 KB

11 p, 1.3 MB

El registro aparece en las colecciones:
Documentos de investigación > Documentos de los grupos de investigación de la UAB > Centros y grupos de investigación (producción científica) > Ciencias > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
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 Registro creado el 2015-06-05, última modificación el 2019-02-19

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