PETROLEUM PROCESSING AND PETROCHEMICALS ›› 2022, Vol. 53 ›› Issue (5): 115-122.

Previous Articles    

STRESS RESPONSE MECHANISM OF OIL-DEGRADING BACTERIA ZS1 TO TOXIC EFFECT OF TYPICAL ANTIBIOTICS

  

  • Received:2021-09-27 Revised:2021-11-23 Online:2022-05-12 Published:2022-04-24

Abstract: In order to elucidate the ecological effects of antibiotics on oil-degrading bacteria and the stress response mechanisms of microorganisms to the toxic effects of typical antibiotics, toxicity tests of different concentrations of typical antibiotics on oil-degrading bacteria pseudomonas aeruginosa (ZS1) were carried out, and the growth and toxicity of thallus cells treated with three kinds of antibiotics (Oxytetracycline, Erythromycin and Sulfadiazine) were studied. The results showed that three antibiotics had different bacteriostatic effects on ZS1, among which Oxytetracycline had the strongest inhibitory effect on ZS1 activity, and the inhibition rate was increased obviously with increasing Oxytetracycline concentration, and there was a significant concentration-effect relationship. The mechanism of ZS1 antioxidant enzymes (Catalase, Peroxidase and Superoxide dismutase) in response to antibiotics was investigated. The results showed that ZS1 could resist external pollution and maintain cellular function by producing antioxidant enzymes when it was contaminated.

Key words: antibiotic, petroleum degrading bacterial, growth inhibition ratio, antioxidant enzymes, responding mechanisms