Growth and phosphate uptake kinetics

Growth and phosphate uptake kinetics of Microcystis aeruginosa under various environmental conditions

Abstract： Growth and uptake of exogenous phosphate by Microcystis aeruginosa in batch culture under differenttemperature, photoperiod, and turbulence were studied by the method of phosphate isotope tracer. Relatively hightemperature, long photoperiod and strong turbulence increased the cell density of M. aeruginosa in these batchcultures. The initial rapid uptake of phosphate by M. aeruginosa was independent of the temperature, photoperiod,and turbulence. Similarly, maximum exogenous phosphate uptake was not related to these environmental factors.However, elevated temperature and turbulence shortened the time, required to obtain maximum P accumulation.The growth of M. aeruginosa could alleviate the phosphorous leakage. Total amounts of exogenous phosphateuptake to M. aeruginosa and the phosphorus leakage of M. aeruginosa were significantly influenced by the growthstate of M. aeruginosa closely correlated with the environmental factors. The maximum volume of exogenousphosphate uptake to M. aeruginosa was 46% of added exogenous phosphate in water with 16 hours of photoperiod.Thus, total amounts of exogenous phosphate uptake to M. aeruginosa were more strongly affected by thephotoperiod length than temperature and turbulence. 作 者： SHI Xiao-li    YANG Liu-yan    WANG Feng-ping    XIAO Lin    JIANG Li-juan    Kong Zhi-ming    GAO Guang    QIN Bo-qiang   作者单位： SHI Xiao-li,YANG Liu-yan,XIAO Lin,JIANG Li-juan,Kong Zhi-ming(State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093, China)

WANG Feng-ping(The Modem Analysis Center, Nanjing University, Nanjing 210093, China)

GAO Guang,QIN Bo-qiang(Nanjing Institute of Geography and Limnology of CAS, Nanjing, 210008,China) 

期 刊： 环境科学学报(英文版)  ISTICSCI   Journal： JOURNAL OF ENVIRONMENTAL SCIENCES  年，卷(期)： 2004, 16(2)  分类号： X172 X52  Keywords： Microcystis aeruginosa    exogenous phosphate    photoperiod    temperature    turbulence    uptake   

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