The natural compound 9,10‐anthraquinone was found to inhibit the growth of the musty odor‐producing cyanobacterium Oscillatoria perornata at a low concentration (1 &mgr;M) in previous laboratory studies. In this study, the mode of action of 9,10‐anthraquinone was investigated by observing ultrastructural changes in O. perornata and by monitoring chlorophyll fluorescence as an indicator of photosynthetic efficiency. Results indicate that 9,10‐anthraquinone inhibits photosynthetic electron transport, probably at PSII, and thereby affects growth. Moreover, 9,10‐anthraquinone treatment caused thylakoid disorganization and reduced the number of ribosomes in O. perornata. The thylakoid disorganization is identical to reported modification in a cyanobacterium treated with simazine, a PSII inhibitor.

中文翻译：

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9,10-蒽醌降低Oscillatoria perornata 的光合效率并改变细胞内含物

在先前的实验室研究中，发现天然化合物 9,10-蒽醌在低浓度 (1 &mgr;M) 下可抑制产生霉味的蓝藻 Oscillatoria perornata 的生长。在这项研究中，通过观察 O. perornata 的超微结构变化和监测作为光合效率指标的叶绿素荧光来研究 9,10-蒽醌的作用方式。结果表明 9,10-蒽醌抑制光合电子传递，可能在 PSII，从而影响生长。此外，9,10-蒽醌处理导致类囊体解体并减少 O. perornata 中的核糖体数量。类囊体的解体与在用西玛津（一种 PSII 抑制剂）处理的蓝藻中报道的修饰相同。