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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 on the release of 32P from Microcystis aeruginosa
【摘要】 采用同位素示踪法 ,分析游离附生假单胞菌 (Pseudomonassp .)对富集3 2 P的铜绿微囊蓝细菌 (Microcystisaeruginosa)中磷释放的影响 .研究结果表明 :在微囊蓝细菌生长的延迟期和对数期 ,游离附生假单胞菌的加入抑制了微囊蓝细菌中3 2 P的释放 ,而对蓝细菌的生长没有明显的影响 ;在微囊蓝细菌生长的稳定期和衰减期 ,假单胞菌促进其蓝细菌细胞内3 2 P的释放 ,同时也加速微囊蓝细菌的衰亡 .假单胞菌对微囊蓝细菌3 2 P释放的促进作用是由于自身的吸磷能力导致的 .假单胞菌的吸磷量由假单胞菌生物量和细胞内磷浓度决定 ,假单胞菌在微囊蓝细菌的整个生长阶段生物量不断增加 ,而体内3 2 P浓度在开始阶段很低 ,直到微囊蓝细菌进入稳定期才达到相对稳定
【Abstract】 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.
【Key words】 Microcystis aeruginosa; Adhesive bacteria; Pseudomonas sp.; 32P;
- 【文献出处】 环境科学学报 ,Acta Scientiae Circumstantiae , 编辑部邮箱 ,2003年04期
- 【分类号】X172
- 【被引频次】17
- 【下载频次】188