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Type: Journal article
Title: Mechanisms of salinity tolerance
Author: Munns, R.
Tester, M.
Citation: Annual Review of Plant Biology, 2008; 59(1):651-681
Publisher: Annual Reviews
Issue Date: 2008
ISSN: 1040-2519
Statement of
Rana Munns and Mark Tester
Abstract: <jats:p>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<jats:sup>+</jats:sup>or Cl<jats:sup>−</jats:sup>exclusion, and the tolerance of tissue to accumulated Na<jats:sup>+</jats:sup>or Cl<jats:sup>−</jats:sup>. Our understanding of the role of the HKT gene family in Na<jats:sup>+</jats:sup>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<jats:sup>+</jats:sup>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.</jats:p>
DOI: 10.1146/annurev.arplant.59.032607.092911
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Appears in Collections:Agriculture, Food and Wine publications
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