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Low‐temperature modulation of the redox properties of the acceptor side of photosystem II: photoprotection through reaction centre quenching of excess energy by Alexander G. Ivanov; Prafullachandra Sane; Vaughan Hurry; Marianna Król; Dimitry Sveshnikov; Norman P. A. Huner; Gunnar Öquist is a Agricultural and Biological Sciences article available to read on EtoBox.
What is Low‐temperature modulation of the redox properties of the acceptor side of photosystem II: photoprotection through reaction centre quenching of excess energy about?
Although it has been well established that acclimation to low growth temperatures is strongly correlated with an increased proportion of reduced Q~A~ in all photosynthetic groups, the precise mechanism controlling the redox state of Q~A~ and its physiological significance in developing cold tolerance in photoautotrophs has not been fully elucidated. Our recent thermoluminescence (TL) measurements of the acceptor site of PSII have revealed that short‐term exposure of the cyanobacterium __Synechococcus__ sp. PCC 7942 to cold stress, overwintering of Scots pine (__Pinus sylvestris__ L.), and acclimation of __Arabidopsis__ plants to low growth temperatures, all caused a substantial shift in the characteristic __T__~M~ of S~2~Q~B~^–^ recombination to lower temperatures. These changes were accompanied by much lower overall TL emission, restricted electron transfer between Q~A~ and Q~B~, and in __Arabidopsis__ by a shift of the S~2~Q~A~^–^‐related peak to higher temperatures. The shifts in recombination temperatures are indicative of a lower activation energy for the S~2~Q~B~^–^ redox pair and a higher activation energy for the S~2~Q~A~^–^ redox pair. This results in an increase in the fr
Who reads Low‐temperature modulation of the redox properties of the acceptor side of photosystem II: photoprotection through reaction centre quenching of excess energy?
It is typically read by researchers, students, and practitioners in Agricultural and Biological Sciences.
- Author
- Alexander G. Ivanov; Prafullachandra Sane; Vaughan Hurry; Marianna Król; Dimitry Sveshnikov; Norman P. A. Huner; Gunnar Öquist
- Publisher
- John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0031-9317)
- Published
- 2003
- Language
- EN
- Field
- Agricultural and Biological Sciences (Life Sciences)