沼泽红假单胞菌对微囊藻毒素的降解

以铜绿微囊藻为材料,通过固相萃取-高效液相色谱方法(SPE-HPLC),研究了沼泽红假单胞菌对微囊藻毒素MC-LR的降解作用。结果表明:沼泽红假单胞菌在厌氧、光照强度2000lx、35℃、pH7.0、乙酸钠为碳源、菌液初始浓度OD680为0.325和初始MC-LR为3mg.L-1时,6d降解率为36.5%,12d达到最高,降解率为78.7%。此降解条件和蓝藻水华爆发的环境条件基本一致,因此该菌株在水华爆发季节消除水中的微囊藻毒素方面具有应用潜力。

Degradation of microcystin by Rhodopseudomonas palustras.

Taking Microcystis aeruginosa as test material,SPE-HPLC was adopted to study the degradation of microcystin-LR by Rhodopseudomonas palustras.Under the conditions of anaerobic,light intensity 2000 lx,35 ℃,pH 7.0,carbon source sodium acetate,and initial concentration OD680 of the bacilli being 0.325,R.palustras could degrade 36.5% and 78.7% of the microcystin-LR with an initial concentration 3 mg·L-1 in 6 d and 12 d,respectively.These degradation conditions were basically the same environmental conditions of algal blooms,and hence,R.palustras could have practical value for removing microcystin-LR from the water body during algal blooms.