Plant Growth and Development Question 78
78. What will be the effect on phytochrome in a plant subjected to continuous red light? [1997]
(a) Level of phytochrome decreases
(b) Phytochrome is destroyed
(c) Phytochrome synthesis increases
(d) Destruction and synthesis of phytochrome remain in equilibrium.
Show Answer
Answer : a
Hints & Solutions
(a) Continuous exposure to red light causes - Conversion of Pr to Pfr which is rapidly destroyed.
- Conversion of Pr to Pfr which is rapidly destroyed.
- Inhibition of synthesis of Pr.
- Total amount of phytochrome decreases.
