Name the following:
a.pigment present in plants which perceives light stimulus
b.plant growth regulator is found in form of gas
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The pigment in plant which perceive light stimulus is phytochromes.
It involves a small family of proteins called "phytochromes" whose chemical properties function like an on and off switch in plant.
B) There are total of 6 types of growth regulators in plant.
They are as follows:-
1. Auxins
2. Gibberellins
3. Cytokinins
4. Abscisic Acid (ABA)
5. Ethylene
6. Vitamins
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