DENDROLOGY

Detailed explanation-1: -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-2: –So the condition where wilting occurs is excessive loss of water, generally, in plants, water is passed out through stomata to the external environment by a process called transpiration.-So wilting occurs when there is excessive transpiration, and there are so many reasons for excessive transpiration.

Detailed explanation-3: -Wilting can be caused by drought or waterlogged soil Plants wilt when roots are unable to supply sufficient moisture to the stems and leaves. Wilting for short periods of time does not harm plants. Sometimes a plant wilts on a hot day because moisture is evaporating from the leaves faster than the roots can take it up.

Detailed explanation-4: -When transpiration exceeds water absorption by the roots, the plant dehydrates. This usually happens each day with the plant rehydrating again each night. As the soil dries out this rehydration is not complete, resulting in the plant becoming water stressed (Figure 3).

Detailed explanation-5: -When loss of water is more than the rate of absorption or uptake of water by the roots, it leads to wilting because of water stress.