Question

Phytochrome is used in .........

• A. Flowering only
• B. Seed germination only
• C. Transpiration only
• D. All physiological processes exhibited by plants such as seed germination,flowering(photo-periodism), stem elongation and transpiration.

Answer 1

Answer: (D)

All physiological processes exhibited by plants such as seed germination,flowering(photo-periodism), stem elongation and transpiration.

Phytochromes are the pigments which detect the presence or absence of light for plants. It has a light absorbing portion attached to a small protein of about 124000 daltons. Phytochromes have direct influence on all physiological processes exhibited by plants such as seed germination, flowering, stem elongation and transpiration.