Munns, R. and Tester, M. (2008) Mechanisms of salinity tolerance. Annual Review of Plant Biology, 59. pp. 651-681.
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Abstract
The physiological and molecular mechanisms of tolerance to osmotic and ionic components of salinity stress are reviewed at the cellular, organ, and whole-plant level. Plant growth responds to salinity in two phases: a rapid, osmotic phase that inhibits growth of young leaves, and a slower, ionic phase that accelerates senescence of mature leaves. Plant adaptations to salinity are of three distinct types: osmotic stress tolerance, Na+ or Cl- exclusion, and the tolerance of tissue to accumulated Na+ or Cl-. Our understanding of the role of the HKT gene family in Na+ exclusion from leaves is increasing, as is the understanding of the molecular bases for many other transport processes at the cellular level. However, we have a limited molecular understanding of the overall control of Na+ accumulation and of osmotic stress tolerance at the whole-plant level. Molecular genetics and functional genomics provide a new opportunity to synthesize molecular and physiological knowledge to improve the salinity tolerance of plants relevant to food production and environmental sustainability.
| Item Type: | Article |
|---|---|
| Author Affiliation: | CSIRO Plant Industry, Canberra, ACT, Australia |
| Subjects: | Plant Physiology and Biochemistry > Plant Physiology Plant Physiology and Biochemistry > Biochemistry Environmental Science > Environment |
| Divisions: | Other Crops |
| Depositing User: | Syamala |
| Date Deposited: | 20 Oct 2010 08:43 |
| Last Modified: | 20 Oct 2010 08:46 |
| Official URL: | http://dx.doi.org/10.1146/annurev.arplant.59.03260... |
| URI: | http://eprints.icrisat.ac.in/id/eprint/21 |
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