Drought-induced mortality in Scots pine : opening the metabolic black box
MacAllister, Sarah (University of Edinburgh (Escòcia, Regne Unit). School of GeoSciences)
Mencuccini, Maurizio (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Sommer, Ulf (University of Birmingham (Anglaterra, Regne Unit). School of Biosciences)
Engel, Jasper (University of Birmingham (Anglaterra, Regne Unit). School of Biosciences)
Hudson, Andrew (University of Edinburgh (Escòcia, Regne Unit). School of Biological Sciences)
Salmon, Yann (University of Helsinki)
Dexter, Kyle G. (University of Edinburgh (Escòcia, Regne Unit). School of GeoSciences)

Data:	2019
Resum:	Forests are sensitive to droughts, which increase the mortality rate of tree species. Various processes have been proposed to underlie drought-induced tree mortality, including hydraulic failure, carbon starvation and increased susceptibility to natural enemies. To give insights into these processes, we assessed the metabolic effects of a mortality-inducing drought on seedlings of Pinus sylvestris L. (Scots Pine), a widespread and important Eurasian species. We found divergence over time in the foliar metabolic composition of droughted vs well-watered seedlings, with the former showing increased abundance of aromatic amino acids and decreases in secondary metabolism associated with defence. We observed no significant differences amongst provenances in these effects: seedlings from drought-prone areas showed the same foliar metabolic changes under drought as seedlings from moist environments, although morphological effects of drought varied by provenance. Overall, our results demonstrate how severe drought prior to death may target particular primary and secondary metabolic pathways, weakening defences against natural enemies and contributing to the risk of droughtinduced mortality in P. sylvestris.
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Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Carbon starvation ; Drought ; Genotype by environment ; Hydraulic failure ; Metabolomics ; Pinus sylvestris ; Plant defence ; Provenance effects ; Seedling
Publicat a:	Tree physiology, Vol. 39, issue 8 (August 2019) , p. 1358-1370, ISSN 1758-4469

DOI: 10.1093/treephys/tpz049

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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)
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