Journal
PLANT PHYSIOLOGY AND BIOCHEMISTRY
Volume 47, Issue 2, Pages 139-145Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.plaphy.2008.10.007
Keywords
Sunflower; Water stress; Drought tolerant genotype; Signal transduction related genes; qRT-PCR
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Funding
- Midi-Pyrenees Regional Program [UMR 1010]
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The study deals with the quantitative expression pattern of genes involved in signaling transduction pathways in response to water stress in leaves and embryos of a water stress tolerant genotype compared to a non-tolerant genotype using real-time quantitative PCR. The experiment was conducted in the field. The results showed a high quantitative up-regulation of genes belonging to protein kinase, phosphatase and transcription factor pathways (from two to 70 fold) only in leaves of the tolerant genotype compared to the non-tolerant genotype. Moreover, genes related to the protein kinase pathway were down-regulated in leaves of the non-tolerant genotype. On the contrary, in seeds, our study showed that the positive regulation of genes related to the signal transduction pathway observed in leaves of the tolerant genotype is turned off, suggesting different transcriptional control of signaling water stress in reproductive organs compared to vegetative organs. (C) 2008 Elsevier Masson SAS. All rights reserved.
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