Different sensitivities to oxygen between two strains of the photosynthetic green sulfur bacterium Chlorobium vibrioforme NCIB 8327 with bacteriochlorophyll c and d
Different sensitivities to oxygen between two strains of the photosynthetic green sulfur bacterium Chlorobium vibrioforme NCIB 8327 with bacteriochlorophyll c and d
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DOI：
10.1007/s11120-005-5669-8
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发表时间：
2005-11-01
影响因子：
3.7
通讯作者：
Tamiaki, H
中科院分区：
文献类型：
--
作者：
Harada, J;Saga, Y;Tamiaki, H
无氧光合作用的绿硫细菌弧菌（Chlorobium vibrioforme NCIB 8327）的两个子菌株来源于同一个无性系，仅通过它们具有细菌叶绿素（BChl） c或d作为周围光收集天线系统的主要色素来进行区分（Saga Y et al. (2003) Anal Sci 19: 1575-1579）。在初始培养基中加入适量的氧气时，BChl d比BChl c的生长迟缓时间更长，说明BChl c更有利于在体内产生活性氧的好氧光条件下存活。这一结果可归因于由BChl c和d自聚集体形成的两种叶绿体之间的中点电位的差异，这是通过荧光猝灭测量的。
Two sub-strains of the anoxygenic photosynthetic green sulfur bacterium Chlorobium vibrioforme NCIB 8327 were derived from the same clone and could be discriminated only by their possession of either bacteriochlorophyll (BChl) c or d as the major pigment in the peripheral light-harvesting antenna system, chlorosome (Saga Y et al. (2003) Anal Sci 19: 1575-1579). In the presence of a proper amount of oxygen in the initial culture medium, the BChl d strain showed longer retardation on its growth initiation than the BChl c strain, indicating that the latter was advantageous for survival under aerobic light conditions which produced reactive oxygen species in vivo. The result would be ascribable to the difference of the midpoint potentials between two kinds of chlorosomes formed by self-aggregates of BChl c and d as measured by their fluorescence quenching.