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The effects of Pb2+ stress on Chlorococcum sp.
Qiu Chang-En; Hu Zheng-Yu (huzy@ihb.ac.cn); Chinese Acad Sci, Inst Hydrobiol, State Key Lab Fershwater Ecol and Biotechnol, Wuhan 430072, Peoples R China
2007
Source PublicationWuhan Zhiwuxue Yanjiu
ISSN1000-470X
Volume25Issue:5Pages:521-526
AbstractThe effects of different concentration Pb2+ (0. 1,1,10,50,100,200,400 mg/L) in BG11 on the growth, morphostructure and physiological characteristics of Chlorococcum sp. were studied. Compared with the cell cultured in BG11, the cell cultured in low concentrations ( <= 50 mg/L) showed few changes in pigment and thickness of cell wall; the cell wall of the cell cultured in high concentrations of Pb2+ ( >50 mg/L) became thicker, and the pigment decreased and the pyrenoid disappeared. When the concentrations of Pb2+ were 0.1 - 10 mg/L,the growth of Chlorococcum sp. showed no obvious difference compared with the control;when the concentration of Pb2+ was 50 mg/L, Chlorococcum sp. could maintain certain growth rate yet; however, when the concentration of Pb2+ was higher than 100 mg/L, the growth of Chlorococcum sp. was inhibited markedly. The contents of Chl a + Chl b or Chl a decreased gradually with the increase of the concenrations of Pb2+ in the medium. The photosynthesis of Chlorococcum sp. 2, 2, decreased gradually with the increase of Pb2+ Concentrations, when the concentration of Pb2+ was higher than 100 mg/L, the photosynthesis of Chlorococcum sp. could not be detected; when the concentration of Pb2+ was less than 50 mg/L,the respiration of Chlorococcum sp. increased gradually with the increase of Pb2+ concentrations, and when the concentration of Pb2+ was higher than 50 mg/L, they decreased gradually with the increase of Pb2+ concentrations. The content of malondiadehyde and activities of superoxide dismutase and peroxidase increased gradually with the increase of Pb2+ concentrations, and the activity of catalase increased at beginning and then decreased with the increase of Pb2+ concentrations. When the concentration of Pb2+ was <= 100 mg/L, the removal rate of Chlorococcum sp. on Pb2+ was > 95 %, and it was up 56.7% yet when the concentration of Pb2+ was 400 mg/L. The results demonstrated that the Chlorococcum sp. could be applied to the treatment of wastewater containing Pb2+, because the Chlorococcum sp. could endure the stress of Pb2+ and was of high removal rate on Pb2+.
Indexed By其他
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/18207
Collection期刊论文
Corresponding AuthorQiu Chang-En; Chinese Acad Sci, Inst Hydrobiol, State Key Lab Fershwater Ecol and Biotechnol, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
Qiu Chang-En,Hu Zheng-Yu ,Chinese Acad Sci, Inst Hydrobiol, State Key Lab Fershwater Ecol and Biotechnol, Wuhan 430072, Peoples R China. The effects of Pb2+ stress on Chlorococcum sp.[J]. Wuhan Zhiwuxue Yanjiu,2007,25(5):521-526.
APA Qiu Chang-En,Hu Zheng-Yu ,&Chinese Acad Sci, Inst Hydrobiol, State Key Lab Fershwater Ecol and Biotechnol, Wuhan 430072, Peoples R China.(2007).The effects of Pb2+ stress on Chlorococcum sp..Wuhan Zhiwuxue Yanjiu,25(5),521-526.
MLA Qiu Chang-En,et al."The effects of Pb2+ stress on Chlorococcum sp.".Wuhan Zhiwuxue Yanjiu 25.5(2007):521-526.
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