Open AccessTocopherol is the scavenger of singlet oxygen produced by the triplet states of chlorophyll in the PSII reaction centre
Author(s) -
Anja KriegerLiszkay
Publication year - 2006
Publication title -
journal of experimental botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.616
H-Index - 242
eISSN - 1460-2431
pISSN - 0022-0957
DOI - 10.1093/jxb/erl002
Subject(s) - singlet oxygen , photochemistry , chemistry , antioxidant , tocopherol , scavenger , chlorophyll , reactive oxygen species , oxygen , quenching (fluorescence) , p680 , photosynthesis , biophysics , botany , biochemistry , photosystem ii , biology , vitamin e , organic chemistry , fluorescence , physics , photosystem i , quantum mechanics
Recent developments on the role of tocopherol in the antioxidant network of the chloroplast and, in particular, in the protection of PSII in high light are summarized. The origin and conditions for singlet oxygen production in the reaction centre via P680 triplet formation are discussed, as well as the scavenging of this singlet oxygen by tocopherol. This is probably the obligatory function of tocopherol in the plant in high light acclimation. Furthermore, tocopherol is part of the modulation system of ROS in stress signalling.
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