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

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Plant & Animal Genomes XVIII Conference

January 9-13, 2010

Town & Country Convention Center

San Diego, CA

P772 : Functional Analysis

Phenotypic And Molecular Plasticity Of Two Eucalypts Clones In Response To Water

Deficit: An Integrated Approach

Emilie VILLAR

1,2

,

Guillaume COAT

2

,

Frank BEDON

2

,

Andreas NDEKO

3

,

Andre

MABIALA

3

,

Evandro NOVAES

4

,

Matias KIRST

4,5

,

Christophe PLOMION

2

,

Jean-Marc

GION

1,2

1

CIRAD UPR39 : Génétique Forestière, Campus International de Baillarguet TA A-39/C Montpellier Cedex 5, 34398, France

2

INRA UMR1202 BIOGECO, 69 Route d’Arcachon, Cestas, F-33612, France

3

UR2PI, BP 1291, Pointe Noire, Rep. of Congo

4

School of Forest Resources and Conservation, University of Florida, PO BOX 110410, Gainesville, USA

5

University of Florida Genetics Institute, University of Florida, Gainesville, USA

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.

PAG-XVIII (P772) Phenotypic And Molecular Plasticity Of Two Eucal... http://www.intl-pag.org/18/abstracts/P07b_PAGXVIII_772.html

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