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Microorganisms 2019, 7(3), 80; https://doi.org/10.3390/microorganisms7030080

Study on the Isolation of Two Atrazine-Degrading Bacteria and the Development of a Microbial Agent

1
Collaborative Innovation Center of Sustainable Forestry in Southern China of Jiangsu Province, (Nanjing Forestry University), Nanjing 210037, China
2
College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
3
Pudong Agrotechnology Extension Center, Shanghai 201201, China
4
Shangqiu Academy of Agricultural and Forestry Sciences, Shangqiu 476000, China
5
Ji’nan Landscape Flower and Plantlet Breeding Center, Jinan 250103, China
*
Author to whom correspondence should be addressed.
Received: 13 February 2019 / Revised: 3 March 2019 / Accepted: 8 March 2019 / Published: 14 March 2019
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Abstract

Two bacteria capable of efficiently degrading atrazine were isolated from soil, and named ATLJ-5 and ATLJ-11. ATLJ-5 and ATLJ-11 were identified as Bacillus licheniformis and Bacillus megaterium, respectively. The degradation efficiency of atrazine (50 mg/L) by strain ATLJ-5 can reach about 98.6% after 7 days, and strain ATLJ-11 can reach 99.6% under the same conditions. The degradation of atrazine is faster when two strains are used in combination. Adding the proper amount of fresh soil during the degradation of atrazine by these two strains can also increase the degradation efficiency. The strains ATLJ-5 and ATLJ-11 have high tolerance to atrazine, and can tolerate at least 1000 mg/L of atrazine. In addition, the strains ATLJ-5 and ATLJ-11 have been successfully made into a microbial agent that can be used to treat atrazine residues in soil. The degradation efficiency of atrazine (50 mg/kg) could reach 99.0% by this microbial agent after 7 days. These results suggest that the strains ATLJ-5 and ATLJ-11 can be used for the treatment of atrazine pollution. View Full-Text
Keywords: atrazine; biodegradation; Bacillus licheniformis; Bacillus megaterium; microbial consortium atrazine; biodegradation; Bacillus licheniformis; Bacillus megaterium; microbial consortium
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Zhu, J.; Fu, L.; Jin, C.; Meng, Z.; Yang, N. Study on the Isolation of Two Atrazine-Degrading Bacteria and the Development of a Microbial Agent. Microorganisms 2019, 7, 80.

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