【摘要】 磷是引起湖泊水华爆发的关键元素 ,微囊藻 (Microcystis)是太湖水华的主要藻种 ,为了研究磷在湖泊水体低级食物链 (细菌、浮游动植物等 )中的代谢 ,以一株自太湖微囊藻上分离的假单胞菌 (Pseudomonassp .)X菌株为试验菌 ,研究了磷形态及生长因子对其生长的影响 结果表明无机磷浓度对X菌生长的影响不大 ,而ATP对X菌的生长有抑制作用 ;在含有无机磷和有机磷的培养基中 ,X菌优先利用无机磷盐 ,X菌还可利用颗粒磷 X菌需要外来生长因子 ,微囊藻提取液可取代酵母膏提供其所须的生长因子更多还原

【Abstract】 Phosphorous is one of the key elements that lead to eutrophication. Pseudomonas sp. (X strain) was isolated from Microcystis aeruginosu in Taihu Lake. A group of test was designed to study the growth and phosphates [K 2HPO 4+KH 2PO 4(1∶1)], organic phosphates (ATP), phosphorus fraction and growth factor. The results showed that the growth of X strain was not affected by inorganic phosphates and restrained by ATP. The strain prefered inorganic phosphorus to organic one when both available. X strain made use of particular phosphorus and extracted of algae that substituted for yeast extracts as growth factor.更多还原