Characteristics of an atrazine degrading bacterium and the construction of a microbial agent for effective atrazine degradation

摘要

A bacterial strain, YQJ-6, capable of highly degrading atrazine was isolated from soil. Strain YQJ-6 was identified asBacillus atrophaeusbased on 16S rRNA and the analysis of morphology as well as physiological and biochemical characteristics. The optimal pH value and temperature for strain YQJ-6 to grow and degrade atrazine were 7.0-7.5 and 30-40 degrees C, respectively. The degradation rate of atrazine (50 mg/L) by strain YQJ-6 reached approximately 99.2% in 7 days. Strain YQJ-6 also had a high tolerance to atrazine and could tolerate at least 1000 mg/L atrazine. In addition, strain YQJ-6 was successfully made into a microbial agent that is easy to commercialize and can be used to treat atrazine residues in soil. The microbial agent containing the strain YQJ-6 achieved good experimental results. It is believed that strain YQJ-6 can be used to control atrazine pollution.