Which pigment system is inactivated in red drop?

Question

Which pigment system is inactivated in red drop? (A) PS-I and PS-II (B) PS-I (C) PS-11 (D) none of the above.

Tardigrade Admin · Accepted Answer

Emerson and Lewis worked on Chlorel/a and Calculated the quantum yield for different wavelengths. Emerson observed that rate of photosynthesis declines in the red region of the spectrum. This decline in 1 photosynthesis is called 'Red drop'. It was observed that the quantum yield falls when the light of wavelengths more than 680 or 690 nm are supplied. As the PS-II (P-680) is driven by red light, so it remains ; inactive during red drop.

Q. Which pigment system is inactivated in red drop?

PS-I and PS-II

PS-I

PS-11

none of the above.