研究论文
蒋丽娟,史小丽,杨柳燕,肖琳,王凤平,高光,秦伯强.游离附生假单胞菌对铜绿微囊蓝细菌中32P释放的影响[J].环境科学学报,2003,23(4):521-524
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
- 基金项目：中科院知识创新项目(KZCX2403)
- 作者
- 单位
- 蒋丽娟
- 污染控制与资源化研究国家重点实验室,南京大学环境学院,南京 210093
- 史小丽
- 污染控制与资源化研究国家重点实验室,南京大学环境学院,南京 210093
- 杨柳燕
- 污染控制与资源化研究国家重点实验室,南京大学环境学院,南京 210093
- 肖琳
- 污染控制与资源化研究国家重点实验室,南京大学环境学院,南京 210093
- 王凤平
- 南京大学现代分析中心
- 高光
- 中国科学院南京地理与湖泊研究所
- 秦伯强
- 中国科学院南京地理与湖泊研究所
- 摘要：采用同位素示踪法,分析游离附生假单胞菌(Pseudomonassp.)对富集32P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32P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32P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32P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32P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 32P from Microcystis aeruginosa was studied using the method of phosphorus isotope tracer. Pseudomonas sp. could inhibit the release of 32P 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 32P 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 32P in Pseudomonas sp. The biomass increased during the entire growth period of M. aeruginosa. The concentration of 32P in Pseudomonas sp. was low at the beginning of this period and did not stabilize until M. aeruginosa was in its stationary phase.
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