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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Comparative transcriptomic analysis of salt adaptation in roots of contrasting medicago truncatula genotypes
Molecular Plant, Volume 5, No. 5, Year 2012
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Description
Evolutionary diversity can be driven by the interaction of plants with different environments. Molecular bases involved in ecological adaptations to abiotic constraints can be explored using genomic tools. Legumes are major crops worldwide and soil salinity is a main stress affecting yield in these plants. We analyzed in the Medicago truncatula legume the root transcriptome of two genotypes having contrasting responses to salt stress: TN1.11, sampled in a salty Tunisian soil, and the reference Jemalong A17 genotype. TN1.11 plants show increased root growth under salt stress as well as a differential accumulation of sodium ions when compared to A17. Transcriptomic analysis revealed specific gene clusters preferentially regulated by salt in root apices of TN1.11, notably those related to the auxin pathway and to changes in histone variant isoforms. Many genes encoding transcription factors (TFs) were also differentially regulated between the two genotypes in response to salt. Among those selected for functional studies, overexpression in roots of the A17 genotype of the bHLH-type TF most differentially regulated between genotypes improved significantly root growth under salt stress. Despite the global complexity of the differential transcriptional responses, we propose that an increase in this bHLH TF expression may be linked to the adaptation of M. truncatula to saline soil environments. © The Author 2012. Published by the Molecular Plant Shanghai Editorial Office in association with Oxford University Press on behalf of CSPB and IPPE, SIBS, CAS.
Authors & Co-Authors
Zahaf, Ons
France, Paris
Cnrs Centre National de la Recherche Scientifique
Blanchet, Sandrine
France, Paris
Cnrs Centre National de la Recherche Scientifique
de Zélicourt, Axel
France, Paris
Cnrs Centre National de la Recherche Scientifique
France, Paris
Université Paris Cité
Alunni, Benoît
France, Paris
Cnrs Centre National de la Recherche Scientifique
France, Paris
Université Paris Cité
Plet, Julie
France, Paris
Cnrs Centre National de la Recherche Scientifique
Laffont, Carole
France, Paris
Cnrs Centre National de la Recherche Scientifique
de Lorenzo, Laura
France, Paris
Cnrs Centre National de la Recherche Scientifique
Spain, Sevilla
Universidad de Sevilla
Spain, Madrid
Csic - Centro Nacional de Biotecnologia Cnb
Imbeaud, Sandrine
France, Gif-sur-yvette
Centre de Génétique Moléculaire
France, Paris
Inserm
Ichanté, Jean Laurent
France, Gif-sur-yvette
Centre de Génétique Moléculaire
Diet, Anouck
France, Paris
Cnrs Centre National de la Recherche Scientifique
France, Paris
Université Paris Cité
Badri, Mounawer
Tunisia, Hamam Lif
Centre de Biotechnologie de Borj Cédria
Zabalza, Ana
Spain, Pamplona
Universidad Pública de Navarra
González, Esther M.
Spain, Pamplona
Universidad Pública de Navarra
Delacroix, Hervé
France, Gif-sur-yvette
Centre de Génétique Moléculaire
Gruber, Véronique
France, Paris
Cnrs Centre National de la Recherche Scientifique
France, Paris
Université Paris Cité
Frugier, Florian
France, Paris
Cnrs Centre National de la Recherche Scientifique
Crespi, Martín D.
France, Paris
Cnrs Centre National de la Recherche Scientifique
Statistics
Citations: 82
Authors: 17
Affiliations: 8
Identifiers
Doi:
10.1093/mp/sss009
ISSN:
16742052
e-ISSN:
17529867
Research Areas
Genetics And Genomics