Phytochrome becomes active in :
Correct answer: A. Red Light
- A. Red Light
- B. Green Light
- C. Blue Light
- D. None of these.
Explanation
Important plant responses regulated by the phytochrome system include photoperiodic induction of flowering, chloroplast development, leaf senescence and leaf abscission. Phytochrome occurs in two forms: Pr (red light) and Pfr (far red light) and both are interconvertable. It is considered that during day time Pfr form accumulates in plants which is inhibitory to flowering in SDP. During night Pr form accumulates in plants which is stimulatory to flowering.
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Embryonic development covers fertilization, cleavage, formation of the blastula and gastrula, germ layers, organ formation and differentiation. Regeneration describes the replacement of lost tissues or body parts, whereas ageing involves gradual cellular and physiological changes linked to reduced repair, altered metabolism and declining organ function.
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