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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Ectopic expression of dehydration responsive element binding proteins (StDREB2) confers higher tolerance to salt stress in potato
Plant Physiology and Biochemistry, Volume 60, Year 2012
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Description
Dehydration responsive element binding proteins (DREB) are members of a larger family of transcription factors, many of which have been reported to contribute to plant responses to abiotic stresses in several species. While, little is known about their role in potato (Solanum tuberosum). This report describes the cloning and characterization of a DREB transcription factor cDNA, StDREB2, isolated from potato (cv Nicola) plants submitted to salt treatment. Based on a multiple sequence alignment, this protein was classified into the A-5 group of DREB subfamily. Expression studies revealed that StDREB2 was induced in leaves, roots and stems upon various abiotic stresses and in response to exogenous treatment with abscisic acid (ABA). In agreement with this expression pattern, over-expression of StDREB2 in transgenic potato plants resulted in enhanced tolerance to salt stress. These data suggest that the isolated StDREB2 encodes a functional protein involved in plant response to different abiotic stresses.An electrophoretic mobility shift assay (EMSA) indicated that the StDREB2 protein bound specifically to the DRE core element (ACCGAGA) in vitro. Moreover, Semi quantitative RT-PCR analysis revealed that the transcript level of a putative target gene i.e. δ1-pyrroline-5-carboxylate synthase (P5CS) was up-regulated in transgenic plants submitted to salt stress conditions. A concomitant increase in proline accumulation was also observed under these conditions.Taking together, all these data suggest that StDREB2 takes part in the processes underlying plant responses to abiotic stresses probably via the regulation of ABA hormone signaling and through a mechanism allowing proline synthesis. © 2012 Elsevier Masson SAS.
Authors & Co-Authors
Bouaziz, Donia
Tunisia, Sfax
Ecole Nationale D'ingénieurs de Sfax
Pirrello, Julien
France, Toulouse
Université Fédérale Toulouse Midi-pyrénées
France, Castanet-tolosan
Génomique et Biotechnologie Des Fruits - Gbf
Ben Amor, Hela
Tunisia, Sfax
Ecole Nationale D'ingénieurs de Sfax
Hammami, Asma
Tunisia, Sfax
Ecole Nationale D'ingénieurs de Sfax
Charfeddine, Mariam
Tunisia, Sfax
Ecole Nationale D'ingénieurs de Sfax
Dhieb, Amina
Tunisia, Sfax
Ecole Nationale D'ingénieurs de Sfax
Bouzayen, Mondher
France, Toulouse
Université Fédérale Toulouse Midi-pyrénées
France, Castanet-tolosan
Génomique et Biotechnologie Des Fruits - Gbf
Gargouri-Bouzid, Radhia
Tunisia, Sfax
Ecole Nationale D'ingénieurs de Sfax
Statistics
Citations: 72
Authors: 8
Affiliations: 3
Identifiers
Doi:
10.1016/j.plaphy.2012.07.029
ISSN:
09819428
Research Areas
Genetics And Genomics
Study Approach
Quantitative