Growth and phosphate uptake kinetics of Microcystis aeruginosa under various environmental conditions.
Growth and uptake of exogenous phosphate by Microcystis aeruginosa in batch culture under different temperature, photoperiod, and turbulence were studied by the method of phosphate isotope tracer. Relatively high temperature, long photoperiod and strong turbulence increased the cell density of M. aeruginosa in these batch cultures. 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 phosphate uptake to M. aeruginosa and the phosphorus leakage of M. aeruginosa were significantly influenced by the growth state of M. aeruginosa closely correlated with the environmental factors. The maximum volume of exogenous phosphate 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 the photoperiod length than temperature and turbulence.
Shi
Xiao-li
XL
State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093, China.
Yang
Liu-yan
LY
Wang
Feng-ping
FP
Xiao
Lin
L
Jiang
Li-juan
LJ
Kong
Zhi-ming
ZM
Gao
Guang
G
Qin
Bo-qiang
BQ
D002498:Centrifugation; D046931:Microcystis / Q000254:growth & development* / Q000378:metabolism*; D010710:Phosphates / Q000493:pharmacokinetics*; D010761:Phosphorus Radioisotopes; D017440:Photoperiod; D012588:Scintillation Counting; D013696:Temperature
D010710:Phosphates; D010761:Phosphorus Radioisotopes