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Interspecific competition between Microcystis aeruginosa and Chlamydomonas microsphaera stressed by tetracyclines by Xudong Zhou; Xincheng Jiang; Jibao Chen; Pengcheng Gao is a scholarly article available to read on EtoBox.

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## Abstract The extensive tetracyclines in human and veterinary medicines cause contamination in the environment that could contribute to the antibiotic-resistant bacteria or the species competition in phytoplankton. In this study, Microcystis aeruginosa (bloom-forming cyanobacteria) and Chlamydomonas microsphaera (common green alga) were selected to test the effect of different concentrations of tetracyclines (tetracycline and oxytetracycline) in mono-culture and co-culture. The results showed that compared with mono-culture, the cell growth of C. microsphaera decreased significantly in co-culture treated with different concentrations of tetracycline and oxytetracycline. With the expose of 0.1, 2, 10 mg L^-1^ of tetracycline, the inhibition ratios of M. aeruginosa varied between 17.7% and 31.37% in co-culture compared to mono-culture, while the cell growth of M. aeruginosa was promoted treated with 0.1, 2, 7.25 mg L^-1^ of oxytetracycline in co-culture. However, the cell growth of C. microsphaera was significantly inhibited with all treatments in co-culture. With the treatment of tetracycline, the specific growth rate of M. aeruginosa was 0.36 to 0.31 day^-1^ in mono-culture and c

Author

Xudong Zhou; Xincheng Jiang; Jibao Chen; Pengcheng Gao

Publisher

Research Square Platform LLC

Published

2022

Language

EN