Per citar aquest document: https://ddd.uab.cat/record/176209
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Physiological adjustments of a Mediterranean shrub to long-term experimental warming and drought treatments
Liu, Daijun (Centre de Recerca Ecològica i Aplicacions Forestals)
Llusià Benet, Joan (Centre de Recerca Ecològica i Aplicacions Forestals)
Ogaya Inurrigarro, Romà (Centre de Recerca Ecològica i d'Aplicacions Forestals Forestals)
Estiarte, Marc (Centre de Recerca Ecològica i Aplicacions Forestals)
Llorens, Laura (Universitat de Girona. Departament de Ciències Ambientals)
Yang, Xiaohong (Xi nan da xue (China). Key Laboratory of Horticulture Science for Southern Mountainous Regions)
Peñuelas, Josep (Centre de Recerca Ecològica i Aplicacions Forestals)

Data: 2016
Resum: Warmer temperatures and extended drought in the Mediterranean Basin are becoming increasingly important in determining plant physiological processes and affecting the regional carbon budget. The responses of plant physiological variables such as shoot water potential (Ψ), carbon-assimilation rates (A), stomatal conductance (gs) and intrinsic water-use efficiency (iWUE) to these climatic regimes, however, are not well understood. We conducted long-term (16 years) field experiments with mild nocturnal warming (+0. 6 °C) and drought (−20% soil moisture) in a Mediterranean early-successional shrubland. Warming treatment moderately influenced Ψ, A and gs throughout the sampling periods, whereas drought treatment strongly influenced these variables, especially during the summer. The combination of a natural drought in summer 2003 and the treatments significantly decreased A and iWUE. Foliar δ13C increased in the treatments relative to control, but not significantly. The values of Ψ, A and gs were correlated negatively with vapor-pressure deficit (VPD) and positively with soil moisture and tended to be more dependent on the availability of soil water. The plant, however, also improved the acclimation to drier and hotter conditions by physiological adjustments (gs and iWUE). Understanding these physiological processes in Mediterranean shrubs is crucial for assessing further climate change impacts on ecosystemic functions and services.
Nota: Número d'acord de subvenció EC/FP7/610028
Nota: Número d'acord de subvenció MINECO/CGL2013-48074-P
Nota: Número d'acord de subvenció AGAUR/2014/SGR-274
Drets: Tots els drets reservats.
Llengua: Anglès
Document: article ; recerca ; acceptedVersion
Matèria: Global warming ; Frequent droughts ; Physiological response ; Long-term experiments ; Plant acclimation
Publicat a: Plant Science, Vol. 252 (Nov. 2016) , p. 53-61, ISSN 0168-9452

DOI: 10.1016/j.plantsci.2016.07.004


Disponible a partir de: 2018-11-30
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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
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 Registre creat el 2017-06-26, darrera modificació el 2017-07-05



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