title: Identification of a new microcystin-degrading bacterium isolated from Lake Chaohu, China.
abstract: A microcystin-LR (MC-LR)-degrading bacterium was isolated from Lake Chaohu, a eutrophic freshwater lake containing toxic cyanobacterial blooms. Based on the analysis of 16S rDNA gene sequence and physiobiochemical characteristics, the isolated strain, most likely belongs to the genus Bacillus with the highest sequence similarity value with Bacillus nanhaiencis strain K-W39 (JQ799091.1), was named B. nanhaiencis strain JZ-2013. The strain JZ-2013 could grow on mineral salt medium supplied with MC-LR as sole carbon and nitrogen sources. The optimal temperature and pH for strain JZ-2013 growth and MC-LR biodegradation were 30°C and 8.0, respectively. The MC-LR with the initial concentration of 15 mg/L could be consumed 80 % by strain JZ-2013 within 9 days. The existence of exogenous carbon and nitrogen sources could significantly increase the removal efficiency of MC-LR. The strain JZ-2013 can efficiently removed MC-LR of low concentration in real water sample.
authors.affiliation: College of Life Science, Anhui Normal University, Wuhu, 241000, People's Republic of China.
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
authors.forename: Hui
authors.initials: H
authors.lastname: Shi
authors.forename: Aimin
authors.initials: A
authors.lastname: Liu
authors.forename: Zhengyu
authors.initials: Z
authors.lastname: Cao
authors.forename: Jiasheng
authors.initials: J
authors.lastname: Hao
authors.forename: Renmin
authors.initials: R
authors.lastname: Gong
mesh_terms: D001409:Bacillus cereus / Q000145:classification / Q000235:genetics / Q000378:metabolism; D001419:Bacteria / Q000302:isolation & purification*; D001673:Biodegradation, Environmental; D002681:China; D004269:DNA, Bacterial / Q000235:genetics / Q000378:metabolism; D060106:Lakes / Q000382:microbiology*; D008387:Marine Toxins; D059013:Microbial Consortia; D052998:Microcystins / Q000378:metabolism*; D008969:Molecular Sequence Data; D012336:RNA, Ribosomal, 16S / Q000235:genetics / Q000378:metabolism; D017422:Sequence Analysis, DNA
chemical_list: D004269:DNA, Bacterial; D008387:Marine Toxins; D052998:Microcystins; D012336:RNA, Ribosomal, 16S; C057862:cyanoginosin LR