RICHET, Nicolas; MAURIAT, Mélanie; LESAGE DESCAUSES, Marie-Claude; ROGIER, Odile; LAURANS, Françoise; HUGUET, Stéphanie; BALZERGUE, Sandrine; LAPALU, Nicolas; PILATE, Gilles; COUTAND, Catherine; PLOMION, Christophe; LEPLÉ, Jean-Charles

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RICHET, Nicolas
Unité de recherche Amélioration, Génétique et Physiologie Forestières [AGPF]

MAURIAT, Mélanie
Biodiversité, Gènes & Communautés [BioGeCo]

LESAGE DESCAUSES, Marie-Claude
Unité de recherche Amélioration, Génétique et Physiologie Forestières [AGPF]

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Ce document a été publié dans

8. Plant Biomechanics International Conference PBM8, 2015-11-30, Nagoya. 2015p. 253 p.

Nagoya University

Résumé en anglais

Plants organs are capable of sensing directional environment stimulus such as light, gravity, water availability and touch. Light and gravity are two of the most important environmental factors affecting plant stem growth and development. During the past 10-15 years, advances in our understanding of the molecular sensing and signaling actors in response to these stimuli have been mainly made in model annual plant. The goal of our study was to decipher the early molecular events operating in poplar wood stem submitted to changes in gravi-stimulation and so, prone to tension wood formation. As light and gravity early signaling may modulate each other we tilted plants in specific isotropic lightening devices enabling to ensure growth but triggering no directional phototropic signal (Fig. 1; Coutand et al., unpublished). Through RNAseq transcriptome profiling, proteomic and phosophoproteomic we identified candidates of the early signaling pathway of tension wood formation in poplar. Prominently, one receptor-like kinase is identified by the different approaches and appears as a good candidate for gravi and/or mechanical signaling. Moreover, several MAP kinases are also identified and could participate to this signaling network. Predicted gene network signaling models will be presented and discussed< Réduire

Mots clés

plant

poplar

Mots clés en anglais

light

gravity

wood

Origine

Importé de hal

Unités de recherche

BioGeCo (Biodiversité Gènes & Communautés) - UMR 1202