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Topsoil depth substantially influences the responses to drought of the foliar metabolomes of Mediterranean forests
Rivas Ubach, Albert (Centre de Recerca Ecològica i Aplicacions Forestals)
Barbeta i Margarit, Adrià (Centre de Recerca Ecològica i Aplicacions Forestals)
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i Aplicacions Forestals)
Guenther, A. (University of California. Department of Earth System Science)
Ogaya Inurrigarro, Romà (Centre de Recerca Ecològica i Aplicacions Forestals)
Oravec, Michal (Akademie věd České Republiky. Centrum výzkumu globální změny)
Urban, Otmar (Akademie věd České Republiky. Centrum výzkumu globální změny)
Peñuelas, Josep (Centre de Recerca Ecològica i Aplicacions Forestals)

Date: 2016
Abstract: The upper soil provides support, water, and nutrients to terrestrial plants and is therefore crucial for forest dynamics. We hypothesised that a tree's metabolic activity (and therefore its metabolome; the total set of metabolites) would be affected by both the depth of upper soil layers and water availability. We sampled leaves for stoichiometric and metabolomic analyses once per season from differently sized Quercus ilex trees under natural and experimental drought conditions representing the likely conditions in the coming decades). Although the metabolomes varied according to tree size, smaller trees did not show higher concentrations of biomarker metabolites related to drought stress. However, the effect of the drought treatment on the metabolomes was greatest for small trees growing in shallow soils. Our results suggest that tree size is more dependent on the depth of the upper soil, which indirectly affects a tree's metabolome, rather than on the moisture content in the upper soil. Metabolomic profiling of Q. ilex supports our finding that water availability in the upper soil is not necessarily correlated with tree size. The higher impact of drought on trees growing in shallower soils nevertheless indicates that any increase in the frequency, intensity, and duration of drought − as has been projected for the Mediterranean Basin and other areas − would affect small trees most. Metabolomics has proved to be a useful means for investigating the links between plant metabolism and environmental conditions.
Note: Número d'acord de subvenció EC/FP7/610028
Note: Número d'acord de subvenció MINECO/GGL2013/48074-P
Note: Número d'acord de subvenció MAGRAMA/OAPN-022/2008
Note: Número d'acord de subvenció AGAUR/2014/SGR-274
Rights: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. Creative Commons
Language: Anglès
Document: article ; recerca ; acceptedVersion
Subject: Vegetation structure ; Soil depth ; Soil moisture ; Metabolomics ; Quercus ilex
Published in: Perspectives in plant ecology and evolution, Vol. 21 (Aug. 2016) , p. 41-54, ISSN 1433-8319

DOI: 10.1016/j.ppees.2016.06.001

Available from: 2018-08-30

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
Articles > Research articles
Articles > Published articles

 Record created 2016-11-21, last modified 2016-12-13

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