Mechanisms of salinity tolerance

Munns, R. and Tester, M. (2008) Mechanisms of salinity tolerance. Annual Review of Plant Biology, 59. pp. 651-681.

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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
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