Transpiration

Transpiration is the process by which water is absorbed by the roots of plants and then released into the atmosphere as water vapor through the stomata in the leaves. This process is crucial for the movement of water from the soil, through the plant, and into the atmosphere.

Factors affecting transpiration

• Temperature: Higher temperatures increase transpiration rates as the water molecules evaporate more quickly.
• Humidity: Transpiration rates decrease in high humidity as the air is already saturated with water vapor.
• Wind: Increased air movement can carry away the water vapor around the leaves, leading to higher transpiration rates.
• Light: Intense light stimulates the opening of stomata, increasing transpiration.

Importance of transpiration

Transpiration plays a vital role in the water cycle, as it contributes to the movement of water from the soil into the atmosphere. It also helps to cool the plant and maintain its shape and structure. Additionally, transpiration assists in the uptake of minerals and nutrients from the soil into the plant's roots.

Study Guide for Transpiration

1. Define transpiration and explain its significance in the water cycle.
2. List and describe the factors that influence transpiration rates.
3. Explain how transpiration aids in the uptake of water and nutrients from the soil.
4. Discuss the impact of environmental factors such as temperature, humidity, wind, and light on transpiration.
5. Compare and contrast transpiration in different types of plants, such as desert plants and tropical plants.