Intracellular phosphorus metabolism and growth of Microcystis aeruginosa in dark/light cycles under various redox potential difference conditions

  • Xiaoli Shi
  • Liuyan YangEmail author
  • Lijuan Jiang
  • Fanxiang Kong
  • Boqiang Qin
  • Guang Gao
Part of the Developments in Hydrobiology book series (DIHY, volume 194)


Phosphorus metabolism and growth of M. aeruginosa were studied under three different conditions of diel fluctuation in redox potential. Redox potential in the culture increased in light and decreased in dark in all treatments except one, when cysteine was added in darkness. Total phosphorus content in M. aeruginosa decreased in darkness and increased in light during exponential growth but increased continuously in the stationary phase. Conversely, polyphosphate (PolyP) accumulated in darkness but was lost in the light. Low redox potential in darkness promoted PolyP accumulation. Polyglucose and soluble orthophosphate may provide energy and phosphorus, respectively, for PolyP synthesis. PolyP was important to M. aeruginosa survival during poor growth conditions. If the redox potential difference in the dark/light cycle was large, M. aeruginosa initially grew faster, but soon lost viability.


Microcystis aeruginosa Growth Phosphorus metabolism Dark/light cycle Redox potential difference Lake Taihu 


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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • Xiaoli Shi
    • 1
    • 2
  • Liuyan Yang
    • 1
    • 2
    Email author
  • Lijuan Jiang
    • 2
  • Fanxiang Kong
    • 1
  • Boqiang Qin
    • 1
  • Guang Gao
    • 1
  1. 1.Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjingP.R. China
  2. 2.State Key Laboratory of Pollution Control and Resource Reuse, School of the EnvironmentNanjing UniversityNanjingP.R. China

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