Light‐harvesting in Acaryochloris marina – spectroscopic characterization of a chlorophyll d‐dominated photosynthetic antenna system

FEBS Letters

Senger, Horst¹  Miyachi, Shigetoh²  Miyashita, Hideaki³  Schiller, Hilmar¹  Dau, Holger¹ 

[1] FB Biologie/Botanik, Philipps-Universität Marburg, Karl-von-Frisch-Str., D-35032 Marburg, Germany;Marine Biotechnology Institute, Head Office, 1-28-10, Hongo, Bunkyo-ku, Tokyo 113, Japan;Marine Biotechnology Institute, Kamaishi Laboratories, Heita, Kamaishi City, Iwate 026, Japan

关键词: Chlorophyll d;    Chlorophyll fluorescence;    Excitation energy transfer;    Light-harvesting complex;    Photosynthesis;    Chl;    chlorophyll;    DCMU;    3-(3;    4-dichlorophenyl)-1;    1-dimethylurea;    F 0;    dark-level fluorescence yield;    F M;    maximal fluorescence yield;    F V;    equals (F M−F 0);    p;    connectivity parameter;    PS;    photosystem;   

DOI  :  10.1016/S0014-5793(97)00620-0

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Oxygenic photosynthesis of the prokaryote Acaryochloris marina involves chlorophyll d (Chl d) as the major pigment [Miyashita et al. (1996) Nature 383, 402]. Four spectral forms of Chl d (peak wavelengths: 694, 714, 726 and 740 nm) are resolvable by low-temperature absorption spectroscopy on intact cells. Based on fluorescence spectra (at 290 K and 77 K) and on analysis of fluorescence induction curves we conclude: (1) excitation energy is efficiently transferred between the various spectral forms of Chl d and the PS II reaction center; (2) Chl d serves as a light-harvesting pigment for both, Photosystem II (PS II) and PS I; (3) excitation energy transfer between PS II units occurs.

【 授权许可】

Unknown