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External Factors Affecting the Rate of Transpiration.

The rate of t...

Question

The rate of transpiration will be higher When

A

Water vapour is saturated

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B

Water vapour saturation deficit more

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C

Water vapour pressure high

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D

None of the above

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Solution

The correct option is B Water vapour saturation deficit more
The rate of transpiration will be higher when water vapour saturation deficit more. Relative humidity of the atmospheric air governs its vapour pressure deficit or DPD or water potential since DPD of atmosphere air is higher at low relative humidity more of water vapours will diffuse out of the leaf interior as compared to high RH when DPD is lower.

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External Factors Affecting the Rate of Transpiration.

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