Transpiration is possible only when the atmos | vedclass

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(B) Transpiration is the process of water loss in the form of water vapor from the aerial parts of the plant,primarily through the stomata. For transp

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Humidity is lower in the atmosphere than in the substomatal cavity.

Vedclass · Answer

(B) Transpiration is the process of water loss in the form of water vapor from the aerial parts of the plant,primarily through the stomata. For transpiration to occur,a water potential gradient must exist between the substomatal cavity (inside the leaf) and the external atmosphere. Water moves from a region of higher water potential to a region of lower water potential. Since the substomatal cavity is usually saturated with water vapor (high humidity),transpiration occurs only when the external atmosphere is drier (lower humidity) than the substomatal cavity. Therefore,the correct condition is that the humidity in the atmosphere must be lower than that in the substomatal cavity.

Transpiration is possible only when the atmospheric factor is...

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