The quenching of photosystem II fluorescence does not protect the D1 protein against light induced degradation in thylakoids

FEBS Letters

Jennings, R.C.¹  Santabarbara, S.¹  Garlaschi, F.M.¹  Barbato, R.²  Zucchelli, G.¹ 

[1] Centro C.N.R. Biologia Cellulare e Molecolare delle Piante, Dipartimento di Biologia, Università di Milano, Via Celoria 26, 20133 Milan, Italy;Dipartimento di Scienze e Tecnologie Avanzate, Università del Piemonte Orientale, Corso Borsalino 54, 15100 Alessandria, Italy

关键词: Photoinhibition;    D1 degradation;    Excited state population;    Fluorescence quenching;    Thylakoid;    PSII;    photosystem II;    P680;    PSII reaction centre;    1O2;    singlet oxygen;    Chl;    chlorophyll;    DNB;    m-dinitrobenzene;    F M;    maximal fluorescence yield;    F o;    fluorescence yield at open reaction centres;   

DOI  :  10.1016/S0014-5793(01)02796-X

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

In spinach thylakoids, the quenching of the singlet excited state in the photosystem II antenna by m-dinitrobenzene does not change the rate of the light induced degradation of the D1 reaction centre protein and offers only limited protection against photoinhibition itself. These results are discussed in terms of the role of non-photochemical quenching as a photoprotective strategy.

【 授权许可】

Unknown