南极适冷菌Rheinheimera sp.97产抗菌活性物质发酵条件的优化(英文)

Optimization of Fermentation Medium and Conditions of Antibiotic Active Substances Produced by Antarctic Psychrotrophic Bacterium Rheinheimera sp. 97

[目的]优化南极适冷菌Rheinheimera sp.97产抗菌活性物质的发酵条件。[方法]通过单因素和正交试验对南极适冷菌R.sp.97产抗菌活性物质的发酵培养基进行了优化,并通过单因素试验对其发酵条件进行了优化。[结果]菌株R.sp.97产抗菌活性物质的最佳培养基为:蛋白胨3.0g/L,硫酸铵1.0g/L,淀粉2.0g/L,NaCl15.0g/L;最佳发酵条件为:发酵培养基初始pH8,发酵温度10℃,摇瓶装液量30.0%(V/V),接种量1.0%(V/V)。优化后菌株R.sp.97发酵液的抗菌活性较优化前提高了18.1%。[结论]为研究南极适冷菌R.sp.97的活性物质奠定了基础。

[Objective] The aim was to optimize the fermentation medium and conditions of antibiotic active substances produced by Antarctic psychrotrophic bacterium Rheinheimera sp.97.[Method] Single-factor experiment and orthogonal test were adopted to optimize the fermentation medium of antibiotic active substances produced by Antarctic psychrotrophic bacterium R.sp.97,while the fermentation conditions were optimized by single-factor experiment.[Result] The optimum fermentation medium for the antibiotic active substances production was as follows：tryptone 3.0 g/L,ammonium sulfate 1.0 g/L,starch 2.0 g/L,NaCl 15.0 g/L.The optimized fermentation conditions were as follows：the starting pH of medium was 8.0,fermentation temperature was 10 ℃,liquid volume in Erlenmeyer flask was 30 %（V/V）and inoculation amount was 1%（V/V）.Under the optimized fermentation medium and conditions,the antibacterial activity of R.sp.97 was increased by 18.1%.[Conclusion] This study had provided basis for the antibiotic active substances produced by Antarctic psychrotrophic bacterium R.sp.97.