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Carotenoid binding to photosystems I and IIof Chlamydomonas reinhardtii cells grown under weak light or exposed to intense light by Bernard Pineau; Catherine Gérard-Hirne; Claude Selve is a Agricultural and Biological Sciences article available to read on EtoBox.

What is Carotenoid binding to photosystems I and IIof Chlamydomonas reinhardtii cells grown under weak light or exposed to intense light about?

Thylakoids, isolated from Chlamydomonas reinhardtii cells which were grown under weak light or exposed to a short period of intense light, were solubilised with decanoyl-N-methylglucamide (Mega 10) or with a new related detergent, dodecanoyl-N-hydroxyethylglucamide (DODHEGA) to prepare photosystem I and II complexes or sub-complexes for pigment stoichiometry determination. Loroxanthin was only bound to photosystem II antenna but most of the lutein, the other main α-carotene derived xanthophyll, was also associated with photosystem II antenna, as well as with the photosystem I antenna in which it represented the main xanthophyll species. The mean xanthophyll composition of the photosystem II antenna, prepared both by partially denaturing electrophoresis or sucrose gradient sedimentation, showed that more than three molecules (most probably four) were associated with individual light-harvesting complex II (LHCII) polypeptide (on the basis of seven chl a per polypeptide). Intense light exposition of the cells resulted in increased levels of lutein and of components of the violaxanthin cycle, part of them being only loosely bound to pigment protein complexes. The violaxanthin cycle com

Who reads Carotenoid binding to photosystems I and IIof Chlamydomonas reinhardtii cells grown under weak light or exposed to intense light?

Author

Bernard Pineau; Catherine Gérard-Hirne; Claude Selve

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0981-9428)

Published

2001

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)