Adjustments and coordination of hydraulic, leaf and stem traits along a water availability gradient
Rosas, Teresa (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Mencuccini, Maurizio (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Barba, Josep (University of Delaware. Plant and Soil Sciences Department)
Cochard, Hervé (Institut National de la Recherche Agronomique (França))
Saura Mas, Sandra (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Martínez Vilalta, Jordi 1975- (Centre de Recerca Ecològica i d'Aplicacions Forestals)

Data:	2019
Resum:	Trait variability in space and time allows plants to adjust to changing environmental conditions. However, we know little about how this variability is distributed and coordinated at different organizational levels. For six dominant tree species in northeastern Spain (three Fagaceae and three Pinaceae) we quantified the inter- and intraspecific variability of a set of traits along a water availability gradient. We measured leaf mass per area (LMA), leaf nitrogen (N) concentration, carbon isotope composition in leaves (δ13C), stem wood density, the Huber value (Hv, the ratio of cross-sectional sapwood area to leaf area), sapwood-specific and leaf-specific stem hydraulic conductivity, vulnerability to xylem embolism (P50) and the turgor loss point (Ptlp). Differences between families explained the largest amount of variability for most traits, although intraspecific variability was also relevant. Species occupying wetter sites showed higher N, P50 and Ptlp, and lower LMA, δ13C and Hv. However, when trait relationships with water availability were assessed within species they held only for Hv and Ptlp. Overall, our results indicate that intraspecific adjustments along the water availability gradient relied primarily on changes in resource allocation between sapwood and leaf area and in leaf water relations.
Ajuts:	Ministerio de Economía y Competitividad CGL2013-46808-R
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Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Drought ; Huber value ; Hydraulic traits ; Interspecific variation ; Intraspecific variation ; Leaf economics spectrum ; Turgor loss point ; Water availability
Publicat a:	The new phytologist, Vol. 223, Issue 2 (July 2019) , p. 632-646, ISSN 1469-8137

DOI: 10.1111/nph.15684

Postprint 39 p, 451.9 KB

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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)
Articles > Articles de recerca
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