Drought response of nodulated roots in pea: from ecophysiological to transcriptomic analyses

Archive ouverte

Prudent, Marion | Salon, Christophe | Girodet, Sylvie | Jeudy, Christian | Rossin, Nadia | Boucherot, Karen | Jacquin, Françoise | Aubert, Gregoire | Pateyron, Stephanie | Moing, Annick | Balzergue, Sandrine | Vernoud, Vanessa

Edité par CCSD -

BAP EA GEAPSI INRA. International audience. In the context of climate change, more frequent episodes of water stress are expected, which will negatively impact symbiotic N2 fixation and consequentely plant nitrogen nutrition, growth and productivity. This emphasizes the need to select drought tolerant pea genotypes. In this study, the physiological and transcriptional responses of both roots and nodules to a drought event, followed by a recovery period were investigated. The hybridization of a 40k pea microarray indicated that, as a result of drought, ~390 and ~380 genes were at least 2-fold differencially regulated in roots and nodules, respectively. After rewatering, most of these genes were regulated in an opposite manner to drought effect. This analysis allowed to identify common and specific metabolic regulatory processes involved in drought tolerance and recovery. The most highly deregulated genes in response to drought (including LEA family members, delta-1-pyrroline-5-carboxylate synthase, SWEET family members...) were subsequently analysed for their expression patterns in response to several drought events each followed by a recovery period. We will discuss the behavior of these genes in terms of kinetics and intensity of their expression. Acknowledgement: this study was supported by the Burgundy & Franche-Comté Region (FABER program), Terres Inovia, the FP7-ABSTRESS project and its grant FP7-613551, the FP7-LEGATO project and its grant agreement FP7-289562.

• Description
• Sujet/Public
• Outil
• Outil d'anticipation
• Mémoire et thèse
• Gestion