Department of Microbiology, Macdonald College of McGill University, Ste. Anne de Bellevue, Quebec H9X 1C0, Canada.
Appl Environ Microbiol. 1984 Feb;47(2):258-62. doi: 10.1128/aem.47.2.258-262.1984.
Nitrapyrin inhibited growth, CH(4) oxidation, and NH(4) oxidation, but not the oxidation of CH(3)OH, HCHO, or HCOONa, by Methylosinus trichosporium OB3b, suggesting that nitrapyrin acts against the methane monooxygenase enzyme system. The inhibition of CH(4) oxidation could be reversed by repeated washing of nitrapyrin-inhibited cells, indicating that its effect is bacteriostatic. The addition of Cu did not release the inhibition. Methane oxidation was also inhibited by 6-chloro-2-picoline. These data suggest that the mode of action of nitrapyrin on M. trichosporium is different from that on chemoautotrophic NH(4) oxidizers or methanogens.
硝吡咯菌素抑制了 Methylosinus trichosporium OB3b 的生长、CH(4)氧化、NH(4)氧化,但不抑制 CH(3)OH、HCHO 或 HCOONa 的氧化,表明硝吡咯菌素作用于甲烷单加氧酶酶系统。硝吡咯菌素抑制的细胞经反复洗涤后,CH(4)氧化的抑制作用可以逆转,表明其作用是抑菌作用。添加 Cu 并不能解除抑制作用。6-氯-2-吡啶甲酸也抑制甲烷氧化。这些数据表明,硝吡咯菌素对 M. trichosporium 的作用方式不同于对化能自养 NH(4)氧化菌或产甲烷菌的作用方式。