Phenotypic and molecular plasticity of two eucalypts clones in response to water deficit: An integrated approach

Villar Emilie, Coat Guillaume, Bedon Franck, Ndeko Andreas, Mabiala André, Novaes Evandro, Kirst Mathias, Plomion Christophe, Gion Jean-Marc. 2010. Phenotypic and molecular plasticity of two eucalypts clones in response to water deficit: An integrated approach. In : Abstracts of Plant and Animal Genomes XVIIIth Conference, San Diego, CA (USA), January 09-13, 2010. s.l. : s.n., Résumé Plant and Animal Genomes Conference. 18, San Diego, États-Unis, 9 January 2010/13 January 2010.

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Abstract : In the context of climate change, water availability will be the main limiting factor affecting biomass production, in particular in intensively managed forest tree plantations. The complexity of drought stress response calls for integrative approaches combining physiological, anatomical and molecular investigations at different scales ranging from particular cells to the whole plant. Such a strategy was developed for two eucalyptus clones used in industrial plantations in the Congo Republic and known for their different water-use efficiency. These two genetic units were submitted to two watering modes in open field conditions and followed during 18 months. We will describe and compare the molecular plasticity of these two genotypes at the transcriptomic (qPCR on candidate genes and profiling without a priori based on 454 sequencing) and proteomic (2DE combined with tandem MS) levels. We will interpret the results based on the analysis of reaction norms at the phenotypic level. By doing so, this study intend to identify genes of adaptive significance to environmental constraints. (Texte intégral)

Classification Agris : F30 - Plant genetics and breeding
F62 - Plant physiology - Growth and development
H50 - Miscellaneous plant disorders
F50 - Plant structure
K10 - Forestry production

Auteurs et affiliations

  • Villar Emilie, CIRAD-BIOS-UPR Génétique forestière (FRA)
  • Coat Guillaume, INRA (FRA)
  • Bedon Franck, INRA (FRA)
  • Ndeko Andreas, UR2PI (COG)
  • Mabiala André, UR2PI (COG)
  • Novaes Evandro, University of Florida (USA)
  • Kirst Mathias, University of Florida (USA)
  • Plomion Christophe, INRA (FRA)
  • Gion Jean-Marc, CIRAD-BIOS-UPR Génétique forestière (FRA)

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