Quantitative studies on phosphorus transference occuring between Microcystis aeruginosa and its attached bacterium (Pseudomonas sp.)
Phosphorus release from Microcystis aeruginosa and attached bacterium (Pseudomonas sp.) isolated from Lake Taihu was examined using a phosphorus isotope tracer in order to investigate the phosphorus transference between the two species. Our results reveal that the amount of phosphorus released form 32P-saturated M. aeruginosa is determined by its growth phase and most of phosphorus is assimilated by Pseudomonas finally while the amount of phosphorus released from 32P-saturated Pseudomonas is also determined by the growth phase of M. aeruginosa and most of them are assimilated by M. aeruginosa. The results suggest that phosphorus transference occurs between M. aeruginosa and its attached Pseudomonas. This process makes microenvironment of mucilage of M. aeruginosa attached bacteria maintain relative high amounts of phosphorus. Attached bacteria may be a temporary phosphorus bank to the growth of M. aeruginosa, and assimilation of phosphorus by M. aeruginosa becomes easy when M. aeruginosa is in lag growth phase. Thus, the phosphorus exchange between M. aeruginosa and attached Pseudomonas in microenvironment may be important to microfood web and cyanobacteria bloom.
KeywordsMicrocystis aeruginosa Attached bacterium Pseudomonas sp. Phosphorus Lake Taihu 32P release
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- Caiola, M. G., 1991. Bdellovibrio-like bacteria in Microcystis aeruginosa. Algological Studies 64: 369–376.Google Scholar
- Lovejoy, C., J. P. Bowman & G. M. Hallegraeff, 1998. Algicidal effects of a novel marine Pseudoalteromonas isolate (Class Proteobacteria, Gamma Subdivision) on harmful algal bloom species of the genera Chattonella, Gymnodinium, and Heterosigma. Applied Environmental Microbiology 64: 2806–2813.Google Scholar
- Pellegrini, S., L. Allievi, B. Lolli & M. G. Caiola, 1997. Bdellovibrio isolation from the Lake Varese (Italy). Annali Di Microbiologia ED Enzimologa 47: 121–129.Google Scholar
- Shi, X., L. Yang, F. Wang, L. Xiao, L. Jiang, Z. Kong, G. Gao & B. Qin, 2004. Growth and phosphate uptake kinetics of Microcystis aeruginosa under varying environmental conditions. Journal of Environmental Sciences 16: 88–92 (in Chinese).Google Scholar
- Whitton, B. A., 1973. Interactions with other organisms. In Carr, N. G. & B. A. Whitton (eds), The Biology of Blue-green Algae. Blackwell, Oxford: 415–433.Google Scholar
- Zou, D., L. Xiao, L. Yang & Y Wan, 2005. Effects of Phosphorus Sources of different forms on phosphorus metabolism of Microcystis aeruginosa and adhesive Pseudomonas sp.. Environmental Science 26(3): 118–121 (in Chinese).Google Scholar