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The factor most important in regulating transpiration is

The factor most important in regulating transpiration is

Options

(a) temperature
(b) light
(c) wind
(d) relative humidity

Correct Answer:

temperature

Explanation:

Temperature is the most important factor that regulates transpiration. Transpiration takes place through open stomata. At 38-40°C stomata can open in complete darkness while at 0°C they remain closed even in continuous light. Normally high temperature above 30°C reduce stomatal opening in many species.

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