Competition for growth substrates in river water between Escherichia coli and indigenous bacteria illustrated by high resolution mass spectrometry,Letters in Applied Microbiology

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Competition for growth substrates in river water between Escherichia coli and indigenous bacteria illustrated by high resolution mass spectrometry
Letters in Applied Microbiology ( IF 2.0 ) Pub Date : 2020-11-08 , DOI: 10.1111/lam.13343
Y Ishii ₁ , F Kurisu ₂ , I Kasuga _{1,

3} , H Furumai ₂

Affiliation

Escherichia coli normally cannot grow in the environment. One environmental stress that prevents E. coli growth may be the competition for growth substrates with co-existing microorganisms. In this study, the growth substrates of E. coli were screened by high resolution mass spectrometry and compared with those of indigenous bacteria in river water. In an incubation experiment, E. coli multiplied in sterilized river water, but did not multiply when indigenous microorganisms were present in the water. By analysing dissolved organic matter in the river water before and after E. coli growth, 35 compounds were identified as putative growth substrates of E. coli. Among them, 33 compounds were also identified as putative growth substrates of indigenous bacteria. These results indicate that E. coli and indigenous bacteria compete for organic substrates in river water, which could suppress the growth of E. coli.

中文翻译：

高分辨率质谱显示大肠杆菌和本地细菌在河水中的生长底物竞争

大肠杆菌通常不能在环境中生长。阻止大肠杆菌生长的一种环境压力可能是与共存微生物对生长底物的竞争。在这项研究中，大肠杆菌的生长底物通过高分辨率质谱法进行了筛选，并与河水中的原生细菌进行了比较。在孵化实验中，大肠杆菌在经过消毒的河水中繁殖，但当水中存在本地微生物时不会繁殖。通过分析大肠杆菌生长前后河水中的溶解有机物，确定了 35 种化合物是大肠杆菌的假定生长底物。其中，33 种化合物也被确定为本地细菌的推定生长底物。这些结果表明 E.

更新日期：2020-11-08

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