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

Question

Quizplus · Accepted Answer

Phytochrome is the pigment responsible for detecting light during de-etiolation (greening) of a tomato plant. It specifically detects red and far-red light, and triggers the conversion of etiolated (pale, elongated) seedlings to green, photosynthetically active plants. Carotenoids, xanthophylls, and chlorophyll can also play a role in light detection and absorption, but they are not specifically involved in de-etiolation.

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