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Microcystin-LR biodegradation by Sphingopyxis sp USTB-05
Xiao, Chengbin; Yan, Hai; Wang, Junfeng; Wei, Wei; Ning, Jun; Pan, Gang
2011-12-01
Source PublicationFRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING IN CHINA
Volume5Issue:4Pages:526—532
AbstractA promising bacterial strain for biodegrading microcystin-LR (MC-LR) as the sole carbon and nitrogen source was successfully isolated from Lake Dianchi, China. The strain was identified as Sphingopyxis sp. USTB-05, which was the first isolated MCs-biodegrading Sphingopyxis sp. in China. The average biodegradation rate of MC-LR by Sphingopyxis sp. USTB-05 was 28.8 mg center dot L(-1) per day, which was apparently higher than those of other bacteria reported so far. The optimal temperature and pH for both strain USTB-05 growth and MC-LR biodegradation were 30A degrees C and 7.0, respectively. The release of MC-LR from the cyanobacterial cells collected from Lake Guishui and the biodegradation of MC-LR by both strain and cell-free extract (CE) were investigated. The results indicated that MC-LR with the initial concentration of 4.0 mg center dot L(-1) in water was biodegraded by Sphingopyxis sp. USTB-05 within 4 d, while MC-LR with the initial concentration of 28.8 mg center dot L(-1) could be completely removed in 3 h by CE of Sphingopyxis sp. USTB-05 containing 350 mg center dot L(-1) protein. During enzymatic biodegradation of MC-LR, two intermediate metabolites and a dead-end product were observed on an HPLC chromatogram. Moreover, the similar scanning profiles of MC-LR and its metabolic products indicate that the Adda side-chain of MC-LR was kept intact in all products.
Department环境水质学国家重点实验室
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Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/6969
Collection环境水质学国家重点实验室
Recommended Citation
GB/T 7714
Xiao, Chengbin,Yan, Hai,Wang, Junfeng,et al. Microcystin-LR biodegradation by Sphingopyxis sp USTB-05[J]. FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING IN CHINA,2011,5(4):526—532.
APA Xiao, Chengbin,Yan, Hai,Wang, Junfeng,Wei, Wei,Ning, Jun,&Pan, Gang.(2011).Microcystin-LR biodegradation by Sphingopyxis sp USTB-05.FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING IN CHINA,5(4),526—532.
MLA Xiao, Chengbin,et al."Microcystin-LR biodegradation by Sphingopyxis sp USTB-05".FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING IN CHINA 5.4(2011):526—532.
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