Molecular and Physiological Mechanisms of Flooding Avoidance and Tolerance in Rice

Molecular and Physiological Mechanisms of Flooding Avoidance and Tolerance in Rice Submergence is one of the major constraints in rice production. The main factor limiting rice survival during submergence is oxygen deprivation. To cope with flooding conditions, rice has developed two survival strategies: either rapid elongation of the submerged tissues to keep up with the rising water level or no elongation to save carbohydrate resources for maintenance of energy production under submerged and concomitant hypoxic conditions. The survival strategies used by rice have been studied quite extensively and the role of several phytohormones in the elongation response has been established. The mechanisms of submergence tolerance include metabolic changes, for instance, the shift to an ethanolic fermentation pathway, reduced elongation growth to save carbohydrates and energy for maintenance processes, and protective antioxidant systems. Current molecular technology can provide tools for the understanding of mechanisms developed by rice to survive submergence. In addition, cloning of genes related to submergence tolerance might open new ways to genetic improvement of this crop. Russian Journal of Plant Physiology Springer Journals

Molecular and Physiological Mechanisms of Flooding Avoidance and Tolerance in Rice

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Kluwer Academic Publishers-Plenum Publishers
Copyright © 2003 by MAIK “Nauka/Interperiodica”
Life Sciences; Plant Sciences
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