The Effect of PH on Photosynthesis in Photosystem 2 Particles

  • Jane Crofts
  • Peter Horton


The transthylakoid pH gradient (ΔpH), which builds up during light-induced electron transport, exerts some control not only on chlorophyll fluorescence but also on the intrinsic photochemical yield of PS2 (Φp) (1, 2). Experiments with isolated chloroplasts have clearly shown that this ΔpH decline in Φp is not dependent on non-photochemical fluorescence quenching (3). Instead it was proposed that a ΔpH induced PS2 cycle was involved and in an attempt to understand the mechanism of ΔpH on photochemical and fluorescence yield the effect of pH on PS2 particles has been examined.


Midpoint Potential Midpoint Redox Potential Sole Electron Acceptor Water Splitting System Dual Wavelength Spectrophotometer 
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Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • Jane Crofts
    • 1
  • Peter Horton
    • 1
  1. 1.Robert Hill Institute, Dept. of Mol. Biol. and Biotech.University of Sheffield, Western BankSheffieldUK

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