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. 1969 Oct;64(2):715-22.
doi: 10.1073/pnas.64.2.715.

A concept of three light reactions in photosynthesis by green plants

D B Knaff  1 , D I Arnon
Affiliations

A concept of three light reactions in photosynthesis by green plants

D B Knaff et al. Proc Natl Acad Sci U S A. 1969 Oct.

Abstract

It has generally been accepted that plant photosynthesis involves two light reactions, one that proceeds best in short-wavelength light and is identified with oxygen evolution (System II) and another that proceeds best in long-wavelength light and is identified with a cycle electron flow (System I). This paper presents a concept of three light reactions in photosynthesis, based on new evidence that System II comprises two rather than one short-wavelength light reaction. These appear to operate in series and to be connected by an electron transport chain peculiar to System II. Parallel to System II is the long-wavelength light reaction of System I.

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References

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