Fluorescence properties of the chlorophyll d-dominated cyanobacterium Acaryochloris sp strain Awaji
Fluorescence properties of the chlorophyll d-dominated cyanobacterium Acaryochloris sp strain Awaji
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DOI：
10.1016/j.jphotochem.2005.09.031
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发表时间：
2006-03-20
影响因子：
4.3
通讯作者：
Mimuro, M
中科院分区：
文献类型：
--
作者：
Akimoto, S;Murakami, A;Mimuro, M
新发现的以叶绿素(Chl)d为主的蓝藻Acaryo氯is sp.的荧光性质通过稳态和时间分辨荧光测量相结合的方法对Awaji菌株进行了检测。无氯阿卡里亚线虫Awaji菌株在室温下的光系统(PS)11荧光波长为745 nm，在-196℃下的光系统(PS)11荧光波长为750 nm，与Acaryoloris marina MBIC 110 17不同，在最大值的较短波长区域有少量的Chl d组分。PS I荧光不是通过稳态测量检测到的，而是通过时间分辨光谱作为瞬变成分检测到的。这一结果清楚地表明，以Chl d为主要色素的无氯菊属的触角系统具有多样性。延迟荧光仅在Chl a荧光区观察到，与A.marina一致。这有力地表明，PS-11反应中心的主要电子供体应该是Chla，这与所有其他产氧光合作用生物是相同的。(C)2005 Elsevier B.V.保留所有权利。
Fluorescence properties of the newly discovered chlorophyll (Chl) d-dominated cyanobacterium, Acaryochloris sp. strain Awaji were examined by a combination of steady state and the time-resolved fluorescence measurements. Acaryochloris sp. strain Awaji, in contrast to Acaryochloris marina MBIC 110 17, exhibited photosystem (PS) 11 fluorescence at 745 nm at room temperature and at 750 nm at - 196 degrees C with a few Chl d components in the shorter wavelength region of the maxima. PS I fluorescence was not detected by steady state measurements but was by time-resolved spectroscopy as a transient component. The results clearly indicated diversity in the antenna systems in the genus Acaryochloris that contains Chl d as major pigments. Delayed fluorescence was observed only in the Chl a fluorescence region, consistent with A. marina. This strongly suggested that the primary electron donor for the PS 11 reaction center should be Chl a, which is identical to all other oxygenic photosynthetic organisms. (c) 2005 Elsevier B.V. All rights reserved.