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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Salt and genotype impact on plant physiology and root proteome variations in tomato
Journal of Experimental Botany, Volume 62, No. 8, Year 2011
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Description
To evaluate the genotypic variation of salt stress response in tomato, physiological analyses and a proteomic approach have been conducted in parallel on four contrasting tomato genotypes. After a 14 d period of salt stress in hydroponic conditions, the genotypes exhibited different responses in terms of plant growth, particularly root growth, foliar accumulation of Na+, and foliar K/Na ratio. As a whole, Levovil appeared to be the most tolerant genotype while Cervil was the most sensitive one. Roma and Supermarmande exhibited intermediary behaviours. Among the 1300 protein spots reproducibly detected by two-dimensional electrophoresis, 90 exhibited significant abundance variations between samples and were submitted to mass spectrometry for identification. A common set of proteins (nine spots), up- or down-regulated by salt-stress whatever the genotype, was detected. But the impact of the tomato genotype on the proteome variations was much higher than the salt effect: 33 spots that were not variable with salt stress varied with the genotype. The remaining number of variable spots (48) exhibited combined effects of the genotype and the salt factors, putatively linked to the degrees of genotype tolerance. The carbon metabolism and energy-related proteins were mainly up-regulated by salt stress and exhibited most-tolerant versus most-sensitive abundance variations. Unexpectedly, some antioxidant and defence proteins were also down-regulated, while some proteins putatively involved in osmoprotectant synthesis and cell wall reinforcement were up-regulated by salt stress mainly in tolerant genotypes. The results showed the effect of 14 d stress on the tomato root proteome and underlined significant genotype differences, suggesting the importance of making use of genetic variability. © 2011 The Author(s).
Authors & Co-Authors
Manaa, Arafet
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
France, Montfavet
Génétique et Amélioration Des Fruits et Légumes Gafl
Ben Ahmed, Hela
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
Valot, Benoît
France, Versailles
Centre de Recherche Île-de-france - Versailles-grignon
Bouchet, Jean Paul
France, Montfavet
Génétique et Amélioration Des Fruits et Légumes Gafl
Aschi-Smiti, Samira
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
Causse, Mathilde A.
France, Montfavet
Génétique et Amélioration Des Fruits et Légumes Gafl
Faurobert, Mireille
France, Montfavet
Génétique et Amélioration Des Fruits et Légumes Gafl
Statistics
Citations: 177
Authors: 7
Affiliations: 3
Identifiers
Doi:
10.1093/jxb/erq460
ISSN:
00220957
e-ISSN:
14602431
Research Areas
Environmental
Genetics And Genomics