Function of β-Carotene and Tocopherol in Photosystem II

By A. Trebst. 2003

111 citations recorded by the source corpus.

Abstract New and known structural and functional insights in the role of β-carotene and of α- tocopherol in photosytem II are reviewed. A concept is presented connecting the failure of P680 triplet quenching by β-carotene with the formation of singlet oxygen and its scavenging in the turnover of the D1 protein and by tocopherol in the maintenance of PS II structure and function.

Subfields: Biochemistry, Molecular Biology

View Paper: https://www.semanticscholar.org/paper/ac10703d78106b5bad37f38b8371cc59f59392fb

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In Biochemistry

K. Asada

In Molecular Biology

Citations in the corpus

Antimicrobial strategies centered around reactive oxygen species--bactericidal antibiotics, photodynamic therapy, and beyond. (2013, background): “In photosynthetic microorganisms and in chloroplasts, antioxidants provide protection against 1O2 via either quenching the 1O2 directly or quenching the excited chlorophylls/bacteriochlorophylls (Cogdell et al., 2000; Trebst, 2003; Telfer, 2005; Krieger-Liszkay et al., 2008).”
Photosynthesis, pigments and ultrastructure of the alpine snow alga Chlamydomonas nivalis (2005, background): “Although -tocopherol (vitamin E) is a wellknown and important antioxidant within plastids (Trebst, 2003), there are no previous reports of the vitamin E content of snow algae.”
Production and Scavenging of Reactive Oxygen Species in Chloroplasts and Their Functions1 (2006, background): “…1O2, but its rate (3 3 10 8 M 21 s21) is two orders of magnitude lower than that with b-carotene (Krasnovsky, 1998). a-Tocopherol is oxidized by 1O2 to a-tocopherol quinone via 8-hydroxyperoxy-tocopherol (for review, see Trebst, 2003), but it is not known by what way a-tocopherol is regenerated.”