Question

Choose the correct answers from the alternatives given :
The pigment, other thanchlorphyf Is, which might be involved in opening of stomata by light is

• A. phytochrome
• B. carotenes
• C. phycobilins
• D. plastocyanin

Answer 1

The correct option is A phytochrome

The stomatal pores of higher plants enable gaseous exchange into and out of leaves for photosynthesis and evaporation. Stomatal opening is found to be induced by both red and blue lights.

Phytochromes are a class of pigments that act as photoreceptors (helps to detect light), either far red or blue. Thus the presence of these pigments might induce the opening of stomata.

So the correct answer is 'Phytochrome'