The Response of Microcystis aeruginosa to the First, Second and Third Exposure of Ofloxacin

2018 5th International Conference on Advanced Composite Materials and Manufacturing Engineering

Zhang, Ao^1 ; Wu, Yixiao^2

Wuhan No.3 Middle School, Wuhan

430050, China^1

School of Resource and Environmental Sciences, Wuhan University, Wuhan

430079, China^2

关键词: Chlorophyll fluorescence;    Dose effects;    Malondialdehyde;    Microcystis aeruginosa;    Ofloxacin;    Photosynthetic pigment contents;    Soluble proteins;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/394/2/022045/pdf
DOI  :  10.1088/1757-899X/394/2/022045

来源: IOP

【 摘 要 】

In recent years, the problem of antibiotics abuse has been serious and aroused the attention of the scholars around the world. The effects of ofloxacin's first, second and third exposure to the algae Microcystis aeruginosa were studied in this paper. The results indicated that the growth of Microcystis aeruginosa was inhibited by the first and repeated exposure of ofloxacin (OFC) in different degrees. The algae showed obvious resistance to OFC in second and third exposure, and the treatment with higher concentration (500μg/L) of OFC to algae could encourage higher resistance. The chlorophyll fluorescence and photosynthetic pigment contents varied with a relation of dose effect response. The OFC displayed inhibition for the synthesis of soluble protein. The content of malondialdehyde and the activity of SOD increased with the increase of OFC concentration. Since the SOD was more active in second and third exposure, the increase of SOD may be one of mechanisms for the resistance of algae to OFC.