Plasticity of maritime pine (Pinus pinaster Ait.) wood forming tissues during a growing season.

PAIVA, Jorge Almiro; GARNIER‐GÉRÉ, Pauline; RODRIGUES, J. C.; ALVES, A.; SANTOS, Sara; GRACA, J.; LE PROVOST, Grégoire; CHAUMEIL, Philippe; DA SILVA-PEREZ, D.; BOSC, Alexandre; FEVEREIRO, P.; PLOMION, Christophe

doi:10.1111/j.1469-8137.2008.02536.x

Métadonnées

Licence d’utilisation du document

PAIVA, Jorge Almiro
Biodiversité, Gènes & Communautés [BioGeCo]
Universidade Nova de Lisboa = NOVA University Lisbon [NOVA]
Instituto de Investigação Científica Tropical = Tropical Research Institute of Portugal [IICT]

GARNIER‐GÉRÉ, Pauline
Biodiversité, Gènes & Communautés [BioGeCo]

RODRIGUES, J. C.
Instituto de Investigação Científica Tropical = Tropical Research Institute of Portugal [IICT]

Langue

Article de revue

Ce document a été publié dans

New Phytologist. 2008, vol. 179, n° 4, p. 1080-1094

Wiley

Résumé en anglais

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.< Réduire

Mots clés

METABOLOME

PINUS PINASTER

TRANSCRIPTOME

Mots clés en anglais

EARLY-WOOD

LATE-WOOD

MOLECULAR PLASTICITY

WOOD FORMATION

PIN MARITIME

Métadonnées

Licence d’utilisation du document