Alternative perspective on photosynthetic yield and enhancement
In the traditional Z scheme of photosynthesis the Emerson effects of red drop (decline in yield of photosynthesis in far-red light) and enhancement (of far-red yield by supplementary short-wavelength light) are taken to be evidence for the coupling in series of two photosystems that absorb unsymmetrically in the far-red region of the spectrum. An alternative explanation for red drop and enhancement is proposed here that does not invoke the series-coupling hypothesis. It is suggested that the Emerson effects may be due to the drop in intensity of radiation from sample absorption, which causes a photochemical loss when the reaction shuts off at depth in the medium. The effects of oxygen, carbon dioxide, and temperature on the yield may also be interpreted in terms of this model.
- Research Organization:
- Univ. of Chicago, IL (United States)
- OSTI ID:
- 5391388
- Journal Information:
- Proc. Natl. Acad. Sci. U.S.A.; (United States), Vol. 84:12
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PHOTOSYNTHESIS
MATHEMATICAL MODELS
CARBON DIOXIDE
OXYGEN
PHOTOSYNTHETIC REACTION CENTERS
TEMPERATURE EFFECTS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
SYNTHESIS
140505* - Solar Energy Conversion- Photochemical
Photobiological
& Thermochemical Conversion- (1980-)