What are the factors which affect transpiration?

Explanation

Factors Affecting Respiration
Internal Factors
1. The amount of protoplasm and its state of activity influence the rate of respiration.
2. Concentration of respiratory substrate is proportional to the rate of respiration.
External Factors
1. Wounding of plant organs stimulates the rate of respiration in that region.
2. Some chemical substance acts as inhibitors. Example : Cyanides.
3. Rate of respiration decreases with decreasing amount of water. Proper hydration is essential for respiration.
4. Light is an indirect factor affecting the rate of respiration.
5. Optimum temperature for respiration is `30^@C`. At low temperature and very high temperature rate of respiration decreases.
6. When sufficient amount of `O_2` is available the rate of aerobic respiration will be optimum and anaerobic respiration is completely stopped. This is called Extinction point.
7. High concentration of `CO_2` reduces the rate of respiration.
8. A plant or tissue transferred from water to salt solution will increase the rate of respiration. It is called salt respiration.