Photoinhibition of PSII Secondary Donors: Relevance to Photoactivation and Sites of Electron Donation

  • Danny J. Blubaugh
  • George M. Cheniae

Abstract

In the absence of either a functional water-oxidizing complex or artificial PSII electron donors, the secondary donors to P680 + are susceptible to weak-light photoinhibition by a mechanism not yet established [1–3]. The ability to restore O2 evolution through the photoactivation process is also weak-light sensitive [4]. We have studied these phenomena in attempts to identify factors which prohibit complete photoactivation, to determine if D+ is specifically required in this process, and to gain some insights into the specificity of Z+ and D+ for the photooxidation of exogenous PSII donors.

Keywords

Electron Donation Residual Rate Secondary Donor Forward Rate Constant Slow Loss 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • Danny J. Blubaugh
    • 1
  • George M. Cheniae
    • 1
  1. 1.University of KentuckyLexingtonUSA

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