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Provedor de dados:  Repositório Alice
País:  Brazil
Título:  Plasticity in leaf-level water relations of tropical rainforest trees in response to experimental drought.
Autores:  BINKS, O.
MEIR, P.
ROWLAND, L.
COSTA, A. C. L. da
VASCONCELOS, S. S.
OLIVEIRA, A. A. R. de
FERREIRA, L.
CHRISTOFFERSEN, B.
NARDINI, A.
MENCUCCINI, M.
Data:  2016-06-27
Ano:  2016
Palavras-chave:  Plasticidade
Relações hídricas
Seca experimental
Anatomia foliar
Resumo:  The tropics are predicted to become warmer and drier, and understanding the sensitivity of tree species to drought is important for characterizing the risk to forests of climate change. This study makes use of a long-term drought experiment in the Amazon rainforest to evaluate the role of leaf-level water relations, leaf anatomy and their plasticity in response to drought in six tree genera. The variables (osmotic potential at full turgor, turgor loss point, capacitance, elastic modulus, relative water content and saturated water content) were compared between seasons and between plots (control and through-fall exclusion) enabling a comparison between short- and long-term plasticity in traits. Leaf anatomical traits were correlated with water relation parameters to determine whether water relations differed among tissues. The key findings were: osmotic adjustment occurred in response to the long-term drought treatment; species resistant to drought stress showed less osmotic adjustment than drought-sensitive species; and water relation traits were correlated with tissue properties, especially the thickness of the abaxial epidermis and the spongy mesophyll. These findings demonstrate that cell-level water relation traits can acclimate to long-term water stress, and highlight the limitations of extrapolating the results of short-term studies to temporal scales associated with climate change.

2016
Tipo:  Artigo em periódico indexado (ALICE)
Idioma:  Inglês
Identificador:  52374

http://www.alice.cnptia.embrapa.br/handle/doc/1047926

http://ainfo.cnptia.embrapa.br/digital/bitstream/item/144817/1/nph13927.pdf

10.1111/nph.13927
Editor:  New Phytologist, v. 211, n. 2, p. 477-488, July 2016.
Relação:  Embrapa Amazônia Oriental - Artigo em periódico indexado (ALICE)
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