The modification of chlorophyll fluorescence of Chlamydomonas reinhardtii by photoinhibition and chloramphenicol addition suggests a form of photosystem II less susceptible to degradation

FEBS Letters

Briantais, Jean-Marie¹  Hodges, Michael¹  Cornic, Gabriel¹ 

[1] Institut de Physiologie Végétale, 91198 Gif-sur-Yvette Cedex, France

关键词: Chlorophyll fluorescence induction;    Chloramphenicol;    Photoinhibition;    (Chlamydomonas);    CAP;    chloramphenicol;    PS;    photosystem;    Chl;    chlorophyll;    F o initial Chl fluorescence;    F i;    intermediate Chl fluorescence;    F m;    maximal Chl fluorescence (+ DCMU);    F v;    F m − F o.;    QA;    primary quinonic acceptor of PS II;    QB;    secondary quinonic acceptor of PS II;    PFD;    photon flux density;   

DOI  :  10.1016/0014-5793(88)80319-3

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The effect of photoinhibition and chloramphenicol addition on room-temperature chlorophyll fluorescence induction parameters exhibited by Chlamydomonas reinhardtii has been studied. The observed changes induced by these different treatments suggest the presence of a photosystem II (PS II) reaction centre having an abnormal turnover rate and which gives rise to the fast initital variable fluorescence rise (F _i−F _o) in the absence of DCMU. It is proposed that a pool of PS II with a modified D₁ protein exists which is less susceptible to degradation. Furthermore, it is shown that the fluorescence quenching associated with photoinhibition is not directly linked to PS II reaction centre degradation.

【 授权许可】

Unknown