The effects of Pb2+ stress on Chlorococcum sp
Qiu, C; Hu, Z
HERO ID
363295
Reference Type
Journal Article
Year
2007
Language
Chinese
| HERO ID | 363295 |
|---|---|
| In Press | No |
| Year | 2007 |
| Title | The effects of Pb2+ stress on Chlorococcum sp |
| Authors | Qiu, C; Hu, Z |
| Journal | Journal of Wuhan University of Technology--Materials Science Edition |
| Volume | 5 |
| Page Numbers | 521-526 |
| Abstract | The effects of different concentration Pb2+ (0.1, 1, 10, 50, 100, 200, 400 mg/litre) 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/litre) showed few changes in pigment and thickness of cell wall; the cell wall of the cell cultured in high concentrations of Pb2+ (>50 mg/litre) became thicker, and the pigment decreased and the pyrenoid disappeared. When the concentrations of Pb2+ were 0.1-10 mg/litre, the growth of Chlorococcum sp. showed no obvious difference compared with the control; when the concentration of Pb2+ was 50 mg/litre, Chlorococcum sp. could maintain certain growth rate yet; however, when the concentration of Pb2+ was higher than 100 mg/litre, 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 concentrations of Pb2+ in the medium. The photosynthesis of Chlorococcum sp. decreased gradually with the increase of Pb2+ concentrations, when the concentration of Pb2+ was higher than 100 mg/litre, the photosynthesis of Chlorococcum sp. could not be detected; when the concentration of Pb2+ was less than 50 mg/litre, the respiration of Chlorococcum sp. increased gradually with the increase of Pb2+ concentrations, and when the concentration of Pb2+ was higher than 50 mg/litre, 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/litre, 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/litre. 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+. |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | Chinese |
| Keyword | bioremediation; cell culture; cell walls; growth; growth rate; lead; stress; waste water; waste water treatment; Chlorococcum; Chlorophyta; algae; plants; aquatic plants; aquatic organisms; eukaryotes; Chlorococcaceae; Chlorococcales; Water Resources (PP200); Pollution and Degradation (PP600); Fermentation Technology and Industrial Microbiology (WW500) (New June 2002); Human Wastes and Refuse (XX300); Industrial Wastes and Effluents (XX400); Morphology of Microorganisms (ZZ392) (New March 2000); Biochemistry and Physiology of Microorganisms (ZZ394) (New March 2000) |
| Is Qa | No |