Which hormone prevents water loss in plants and hormone causes stomata to close to prevent water loss?
ABA is a key hormone that regulates water status and stomatal movement. Under drought conditions, plants produce and accumulate increased amounts of ABA in the guard cells, and this induces stomatal closure to conserve water. Wilting of leaves is the loss of rigidity and is caused when turgor pressure is lignified and reaches zero it happens in the inadequate water supply and is caused by the hormone abscisic acid to prevent water loss. In guard cells, the plant hormone abscisic acid (ABA) inhibits stomatal opening and induces stomatal closure through the coordinated regulation of ion transport. The opening and closing of stomata are controlled by specialized cells called guard cells. The turgor pressure in the guard cells controls the opening and closing of the guard cells. Stomatal pores open when guard cells enlarge as a result of water absorption and close when guard cells shrink.Stomata can completely be closed under severe drought stress, which is closely dependent on plant species, so tolerant species control status of their stomata to allow carbon fixation and photosynthesis as well as improving water use efficiency.
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