Plant Growth and Development Question 75
75. Proteinaceous pigment which control activities concerned with light
(a) phytochrome
(b) chlorophyll
(c) anthocyanin
(d) carotenoids
Show Answer
Answer : a
Hints & Solutions
(a) Borthwick & Hendricks (1952) gave the concept of phytochrome. Phytochrome is a coloured protein pigment located in plasma membrane to perceive the photoperiodic stimulus in leaves. It may exist in two interconvertable forms Pr and Pfr (red and far red light absorbing forms).
