Department of Biological Sciences, Tokyo Metropolitan University.
Microbes Environ. 2020;35(2). doi: 10.1264/jsme2.ME20015.
Filamentous anoxygenic photosynthetic bacteria grow by photosynthesis and aerobic respiration. The present study investigated the effects of light and O on bacteriochlorophyll contents and the transcription levels of photosynthesis-related genes in Chloroflexus aurantiacus J-10-fl . Under aerobic conditions, C. aurantiacus produced marked amounts of bacteriochlorophylls in the presence of light, although their production was strongly suppressed in the dark. The transcription levels of genes related to the synthesis of bacteriochlorophylls, photosystems, and chlorosomes: bchM, bchU, pufL, pufBA, and csmM, were markedly increased by illumination. These results suggest that C. aurantiacus continuously synthesizes ATP by photophosphorylation even in the presence of O.
丝状蓝细菌通过光合作用和需氧呼吸生长。本研究调查了光和 O 对 Chloroflexus aurantiacus J-10-fl 菌体内细菌叶绿素含量和与光合作用相关基因转录水平的影响。在需氧条件下，尽管在黑暗中受到强烈抑制，C. aurantiacus 在有光的情况下仍会产生大量的细菌叶绿素。与细菌叶绿素合成、光系统和类囊体相关的基因：bchM、bchU、pufL、pufBA 和 csmM 的转录水平明显增加。这些结果表明，即使在 O 存在的情况下，C. aurantiacus 也通过光合磷酸化不断合成 ATP。
