Abstract:The contents of microcystins (MCs) in dry cyanobacterial cells taken from Dianchi Lake and the biodegradation of MC-YR, RR and LR by Sphingopyxis sp. USTB-05 at the cellular and enzyme levels were studied. The contents of MC-YR, RR and LR in dry cyanobacterial cells were 0.16, 0.96 and 0.47mg/g, respectively. Initial concentrations of 19.5mg/L MC-YR, 79.5mg/L MC-RR and 43.6mg/L MC-LR were completely biodegraded by Sphingopyxis sp. USTB-05 within 2d. Further studies indicated that MC-YR, RR and LR could also be biodegraded in more rapid rates by crude enzymes of Sphingopyxis sp. USTB-05, and initial MC-YR, RR and LR of 14.8, 28.4, 19.5mg/L were completely removed within 10h, respectively, and two intermediate and one final products were found during the biodegradation process of MC-YR catalyzed by the crude enzymes of USTB-05.
徐慧敏, 闫海, 马松, 王华生, 尹春华, 刘晓璐. 鞘氨醇单胞菌USTB-05对微囊藻毒素的生物降解[J]. 中国环境科学, 2014, 34(5): 1316-1321.
XU Hui-Min, YAN Hai, MA Song, WANG Hua-Sheng, YIN Chun-Hua, LIU Xiao-Lu. Biodegradation of microcystins by Sphingopyxis sp. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(5): 1316-1321.