El-Omari, R. and Nhiri, M. (2015) Adaptive response to salt stress in sorghum (Sorghum bicolor). American-Eurasian Journal of Agricultural & Environmental Sciences, 15 (7). pp. 1351-1360.
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Abstract
Sorghum (Sorghum bicolor) plants were treated with 50, 100 and 150 mM NaCl. Growth parameters (length, dry weight, fresh weight and water content), biochemistry parameters (proline, proteins, amino acids, total soluble sugars and chlorophyll content), activities of antioxidative enzymes (superoxide dismutase (SOD), catalase (CAT), guaïacol peroxidase (POD) and glutathione reductase (GR)) as will as the activities of nitrate reductase (NR), glutamine synthetase (GS) and phosphoenolpyruvate carboxylase (PEPC) were studied in the leaves and roots after 25 days of NaCl exposure. The results showed that growth parameters were not affected by salinity in both organs. Therefore biochemistry parameters and activities of antioxidative enzymes generally were increased in roots and leaves with increasing salinity levels up to 150 mM NaCl. Exogenous NaCl in culture medium no induced significant difference in the leaves and roots about nitrate reductase activity. In contrast, an increase in glutamine synthetase activity was noticed in these organs. Activity phosphoenolpyruvate carboxylase was significantly increased by 50 mM NaCl in the leaves while in roots, it was increased only at 50 mM and 100 mM NaCl. These results suggested that the sorghum showed a better protection mechanism against oxidative damage caused by salt stress by its higher induced activities of antioxidant enzymes,GS, PEPC, accumulation of compatible organic solutes and chlorophyll.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Sorghum bicolor Salt stress Antioxidative enzymes Compatible organic solutes Glutamine synthetase and Phosphoenolpyruvate carboxylase |
| Author Affiliation: | Laboratoire de Biochimie et Génétique Moléculaire, Faculté des Sciences et Techniques, Université Abdelmalek Essaâdi, Tanger Principal BP 416, Tanger, Morocco |
| Subjects: | Plant Physiology and Biochemistry > Biochemistry |
| Divisions: | Sorghum |
| Depositing User: | Mr T L Gautham |
| Date Deposited: | 04 Dec 2015 08:49 |
| Last Modified: | 04 Dec 2015 08:49 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/14075 |
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