Effect of free-living adhesive Pseudomonas on the release of 32P from Microcystis aeruginosa
游离附生假单胞菌对铜绿微囊蓝细菌中32P释放的影响

Effect of free living adhesive Pseudomonas sp. on the release of 32 P from Microcystis aeruginosa was studied using the method of phosphorus isotope tracer. \%Pseudomonas\% sp. could inhibit the release of 32 P when \%M. aeruginosa\% was in its lag and exponential growth phases but had no significant effect on its growth. \%Pseudomonas\% sp. accelerated the release of 32 P and promotes the declining of \%M. aeruginosa\% cells in the stationary phase and declining phase . The promotive effect of \%Pseudomonas\% sp. is influenced by its own phosphorus uptake ability which was determined by its biomass and the concentration of 32 P in \%Pseudomonas\% sp. The biomass increased during the entire growth period of \%M. aeruginosa\%. The concentration of 32 P in \%Pseudomonas\% sp. was low at the beginning of this period and did not stabilize until \%M. aeruginosa\% was in its stationary phase.