If light intensity is high so destruction of chlorophyll molecules occur this is called solarisation..

Solarisation is the process of destruction of chlorophyll molecules.

Explanation:
Solarisation refers to the harmful effects of excessive sunlight on plants, particularly on the pigments responsible for photosynthesis, such as chlorophyll. The process involves the destruction of chlorophyll molecules due to prolonged exposure to high-intensity sunlight.

Effects of Solarisation:
When plants are exposed to excessive sunlight, especially during the peak hours of the day, it can lead to the following effects:

1. Damage to chlorophyll molecules: The high-energy radiation from sunlight can cause damage to the chlorophyll molecules present in the chloroplasts of plant cells. This damage disrupts the structure and function of chlorophyll, ultimately leading to its destruction.

2. Reduced photosynthesis: Chlorophyll is crucial for the process of photosynthesis, which is the primary means by which plants convert sunlight into chemical energy. When chlorophyll is destroyed, the plant's ability to carry out photosynthesis is compromised, resulting in reduced energy production.

3. Loss of green color: Chlorophyll is responsible for the green color of leaves and other plant parts. When chlorophyll molecules are destroyed, the leaves may lose their green color and appear yellow or brownish.

4. Reduced plant growth: With a decrease in photosynthesis, the plant's ability to produce energy and synthesize important molecules, such as carbohydrates, is hindered. This can result in stunted growth, reduced biomass, and overall poor plant health.

5. Increased susceptibility to stress: Solarisation weakens the plant's defense mechanisms, making it more vulnerable to various environmental stresses, such as drought, heat, and disease. This can further hinder the plant's growth and survival.

Prevention and mitigation:
To prevent solarisation and protect plants from excessive sunlight, various strategies can be employed, such as:

1. Shade: Providing shade to plants during the hottest hours of the day can help reduce the intensity of sunlight reaching the leaves.

2. Watering: Regular watering can help cool the plant and mitigate the effects of excessive heat and sunlight.

3. Using reflective materials: Reflective materials, such as white mulch or reflective films, can be used to redirect sunlight away from the plants, reducing the risk of solarisation.

4. Timing: Scheduling outdoor activities, such as watering or pruning, during the early morning or late afternoon can minimize exposure to intense sunlight.

In conclusion, solarisation refers to the destruction of chlorophyll molecules due to excessive sunlight. This process can have detrimental effects on plant growth, photosynthesis, and overall plant health. Taking preventive measures can help protect plants from solarisation and ensure their optimal growth and development.