Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/5941
Título: Plasticity of maritime pine (Pinus pinaster) wood-forming tissues during a growing season
Autor: Paiva, J.A.P.
Garnier-Gére, P.H.
Rodrigues, J.C.
Alves, A.
Santos, S.
Graça, J.
Le Provost, G.
Chaumeil, P.
Silva-Perez, D.
Bosc, A.
Fevereiro, P.
Plomion, C.
Palavras-chave: early-wood
molecular plasticity
Pinus pinaster
wood formation
Data: 2008
Editora: INRA
Citação: "New Phytologist". ISSN 0028-646x. 179(4) (2008) 1080-1094
Resumo: • The seasonal effect is the most significant external source of variation affecting vascular cambial activity and the development of newly divided cells, and hence wood properties. Here, the effect of edapho-climatic conditions on the phenotypic and molecular plasticity of differentiating secondary xylem during a growing season was investigated. • Wood-forming tissues of maritime pine (Pinus pinaster) were collected from the beginning to the end of the growing season in 2003. Data from examination of fibre morphology, Fourier-transform infrared spectroscopy (FTIR), analytical pyrolysis, and gas chromatography/mass spectrometry (GC/MS) were combined to characterize the samples. Strong variation was observed in response to changes in edapho-climatic conditions. • A genomic approach was used to identify genes differentially expressed during this growing season. Out of 3512 studied genes, 19% showed a significant seasonal effect. These genes were clustered into five distinct groups, the largest two representing genes over-expressed in the early- or late-wood-forming tissues, respectively. The other three clusters were characterized by responses to specific edapho-climatic conditions. • This work provides new insights into the plasticity of the molecular machinery involved in wood formation, and reveals candidate genes potentially responsible for the phenotypic differences found between early- and late-wood.
Descrição: Research
Peer review: yes
URI: http://hdl.handle.net/10400.5/5941
ISSN: 0028-646x
Aparece nas colecções:CEF - Artigos de Revistas

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