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Quantitative studies on phosphorus transference occuring between Microcystis aeruginosa and its attached bacterium (Pseudomonas sp.)

  • Eutrophication in Lakes
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Abstract

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.

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Acknowledgements

We thank F. Wang (Modern Analysis Center, Nanjing University) for their technical assistances. This study was funded by Chinese Academy of Sciences (No. KZCX2-311), “973” Project (No. 2002CB412307) and National Natural Science Foundation of China (No. 40371102, 40501078).

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Authors and Affiliations

  1. State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 22 Hankou Road, Nanjing, 210093, P. R. China

    Lijuan Jiang, Liuyan Yang, Lin Xiao & Xiaoli Shi

  2. Nanjing Institute of Geography and Limnology, CAS, 73 East Beijing Road, Nanjing, 210008, P. R. China

    Liuyan Yang, Xiaoli Shi, Guang Gao & Boqiang Qin

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  1. Lijuan Jiang
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  2. Liuyan Yang
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  3. Lin Xiao
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  4. Xiaoli Shi
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  5. Guang Gao
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  6. Boqiang Qin
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Correspondence to Liuyan Yang.

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Jiang, L., Yang, L., Xiao, L. et al. Quantitative studies on phosphorus transference occuring between Microcystis aeruginosa and its attached bacterium (Pseudomonas sp.). Hydrobiologia 581, 161–165 (2007). https://doi.org/10.1007/s10750-006-0518-0

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  • DOI: https://doi.org/10.1007/s10750-006-0518-0

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