The Detector of Light During De-Etiolation (Greening)of a Tomato Plant

Question

The detector of light during de-etiolation (greening)of a tomato plant is (are)
A)carotenoids.
B)xanthophylls.
C)phytochrome.
D)chlorophyll.
E)auxin.

Accepted Answer

Phytochrome is the primary photoreceptor responsible for detecting light during de-etiolation or greening of a tomato plant. It exists in two interconvertible forms, Pfr and Pr, and undergoes a conversion when exposed to red and far-red light respectively. This conversion plays a key role in regulating various physiological processes.