Advantages of Transpiration:
Transpiration is regarded as a boon to the plants for many reasons:
1. It creates suction force and helps in the ascent of sap.
2. It affects the diffusion pressure deficit, thereby indirectly helping diffusion through the cells.
3. It affects the absorption of water and minerals by roots.
4. It helps in evaporating excess amount of water.
5. It plays an indispensable role in the translocation of food from one part of the plant to the other.
6. It affects the diffusion pressure deficit, thereby indirectly helping diffusion through the cells.
7. It affects the absorption of water and minerals by roots.
8. It helps in evaporating excess amount of water.
9. It plays an indispensable role in the translocation of food from one part of the plant to the other.
Disadvantages of Transpiration:
1. Transpiration often results in water deficit (capillary water) which causes injury to the plants by desiccation.
2. Rapid transpiration causes mid-day leaf water deficit (temporary wilting). If such condition continues for some time, permanent water deficit (permanent wilting) may develop, which may be fatal to the plants.
3. Many xerophytes have to develop structural modifications to reduce transpiration. These modifications are extra burden on the plants.
4. Excessive rate of transpiration leads to stunted growth of plants.
5. Since approximately 90 percent of absorbed water is lost through transpiration, the energy used in absorption and conduction of water goes waste.
