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A drought condition suffered by plants that occurs despite there being sufficient water in the soil. It may occur when the concentration of solutes in the soil water is equal to or higher than that in the root cells so water cannot enter the plant by osmosis. This situation may be found in salt marshes and coastal mud flats. It also occurs during cold spells when there is an increase in the resistance of the root to water movement into the plant. Root resistance increases in response to low temperatures since the permeability of endodermal cells decreases rapidly below 5°C.
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