Upshift of Light Intensity on Synechocystis 6714 Causes Increases in Glycogen, Respiration, and P700 Reduction
Electron transport to O2 uses some of the same carriers which provide for transport from PS2 to PS1 in light.
Under a light 1 (as 440 or 680 nm) P700 is an effective competitor to cytochrome oxidase and becomes the acceptor for respiratory electrons. This gives rise to the Kok effect, a suppression of O2 uptake.
Under a light 1 rate of photoreaction 1 is limited by rate of electron supply.
KeywordsDark Respiration Growth Delay Substrate Pool Electron Supply Steady State Culture
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