Question

explain factors the rate of transpiration

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Answer 1

Answer:

ate of transpiration

Two houseplants side by side. The one on the right is drooping and wilted.

Plants wilt and may die if they lose too much water

If the rate of transpiration increases, the rate of absorption of water by the root increases too. Factors that affect the rate of transpiration also affect water uptake by the plant. If water is scarce, or the roots are damaged, a plant may wilt.

Factors affecting rate

The rate of transpiration is affected by several factors, including:

temperature

humidity

wind speed

light intensity

This table shows the effects on the rate of transpiration when certain factors are increased.

TemperatureIncreasedEvaporation and diffusion are faster at higher temperatures

HumidityDecreasedDiffusion of water vapour out of the leaf slows down if the leaf is already surrounded by moist air

Wind speedIncreasedMoving air removes water vapour, increasing the rate of diffusion of water vapour from the leaf

Light intensityIncreasedThe stomata open wider to allow more carbon dioxide into the leaf for photosynthesis

Answer 2

Question

What are the factors that affect the rate of transpiration?

Answer

• Factors affecting transpiration

• temperature.

• humidity.

• air movement.

• light intensity.