NEET BIOLOGY

Detailed explanation-1: -Lack of water hastens plant maturity and can lead to wilting. Wilting happens when the rate at which water is lost through transpiration exceeds the rate of absorption. But often, many plants react by temporarily closing natural openings such as stomata, hydathodes, and lenticels to conserve water.

Detailed explanation-2: -On a hot, dry day (or after several days with no rain or watering), transpiration causes more water to be lost than is coming in, and the water balance within the plant can get thrown off. The dehydrated collapsing cells in the leaves and stems can no longer remain erect, and the plant begins to wilt.

Detailed explanation-3: -Wilting diminishes the plant’s ability to transpire and grow. Permanent wilting leads to plant death. Symptoms of wilting and blights resemble one another. The plants may recover during the night when evaporation is reduced as the stomata closes.

Detailed explanation-4: -Water enters a plant through its stem and travels up to its leaves. When a plant is properly hydrated, there is enough water pressure to make the leaves strong and sturdy; when a plant doesn’t get enough water, the pressure inside the stems and leaves drops and they wilt.

Detailed explanation-5: -A plant does not use most of the water that it absorbs. About 97-99% of the water is lost through transpiration. Transpiration is defined as the physiological loss of water in the form of water vapor, mainly from the stomata in leaves, but also through evaporation from the surfaces of leaves, flowers, and stems.