What is the action spectrum of transpiration?

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(D) The action spectrum of transpiration refers to the range of wavelengths of light in which the rate of transpiration is maximum. Experimental studi

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Blue and red

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(D) The action spectrum of transpiration refers to the range of wavelengths of light in which the rate of transpiration is maximum. Experimental studies have shown that the rate of transpiration is highest in the blue and red regions of the visible light spectrum. This is primarily because stomatal opening,which facilitates transpiration,is most effectively triggered by blue light,and these wavelengths also contribute to the heating of the leaf surface,thereby increasing the rate of evaporation.

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