HORTICULTURE SCIENCE
CROP PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Two photosystems operating simultaneously
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Photophosphorylation and cyclic electron transport
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Oxidative photophosphorylation
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Photophosphorylation and non-cyclic electron transport
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Detailed explanation-1: -This is known as red drop. Later, he provided synchronished light of 680 nm and 700 nm and observed a increase in the rate of photosynthesis. This is known as Emerson enhancement effect. this experiment led to discover of two photosystem-PS-I (P700) and PS-II (P680) operating in photosynthesis.
Detailed explanation-2: -The red drop experiment was demonstrated by Robert Emerson and Charlton Lewis in 1943. The scientists set an experiment for oxygen evolution in the green algae Chlorella pyrenoidosa and examined the action spectrum in the visible region.
Detailed explanation-3: -The Emerson enhancement effect refers to the increase in quantum yield of photosynthesis when monochromatic beams of two different wavelengths (680 and 700 nm) are used together on the test organism (Chlorella).