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18.6 - Recovery when waters recede

Most terrestrial plants cannot withstand complete submergence lasting over a few days; however, semi-aquatic plants such as certain rice genotypes can survive complete submergence for over two weeks, as described in the preceding section. The period of submergence endured depends on various environmental conditions and the plant’s growth stage.

Tolerance in rice of transient submergence caused by flash floods is mainly achieved by assuming a “quiescent” strategy when submerged until floodwater recedes. Recovery after submergence when floodwaters recede is dependent on metabolic changes that occur during and immediately following submergence.