Reversible reorganization of the chlorophyll‐protein complexes of photosystem II in cyanobacterium cells in the dark ag

FEBS Letters

Krasnovsky, A.A.¹  Lebedev, N.N.¹  Van Ni, Chan¹ 

[1] A.N. Bakh Institute of Biochemistry, Moscow 117071, USSR

关键词: Pheophytin;    Reaction center;    Fluorescence;    Photosystem II;    Cyanobacteria;    ALA;    5-aminolevulinic acid;    Chl;    chlorophyll;    CP;    chlorophyll-protein complex;    LHCP;    light-harvesting chlorophyll-protein complexes;    Pheo;    pheophytin;    PS;    photosystem;    RC;    reaction centre;   

DOI  :  10.1016/0014-5793(89)81248-7

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

A new emission band at 673 nm was detected in the low-temperature fluorescence spectrum of dark-adapted cyanobacteria Gloeotrichia raciborski. The excitation spectrum of this band was close to the absorbance of the isolated reaction centre of photosystem II. The relative intensities of the bands of chlorophyll and pheophytin in this spectrum showed the relative concentrations of these pigments to be about 3:1. The intensity of the band increased with darkness (half-time about 2 h). Under illumination the band rapidly disappeared (half-time about 60 s). The appearance of a 673 nm band in the dark and its disappearance in the light were accompanied by a decrease, and, respectively, an increase in the fluorescence of the PS II band at 697 nm.

【 授权许可】

Unknown