Effects of Liquid Culture for Monascus on Monacolin K and Lovastatin Production
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摘要: 对红曲霉产开环莫纳可林K及闭环洛伐他丁的液态发酵工艺进行研究, 探讨不同培养基成分和发酵条件对产洛伐他丁开闭环组分的影响。结果表明, 最佳的变温培养方法是先30℃培养2d后再26℃培养7d, 产生的开环莫纳可林K的比例可达87%, 比26℃恒温培养的提高了2.63倍。当培养基中添加8%木糖、3%蛋白胨、0.2%NaNO3、0.2%KH2PO4、0.35%MgSO4, 在接种量6%, 摇床转速160r·min-1, 采用变温培养方法, 得到的洛伐他汀类物质的产量最高, 且开环莫纳可林K含量比基本培养基的提高了18倍。Abstract: The effects of medium compositions and culture conditions in Monascus liquid culture were studied on the production and the ratio of Monacolin K and Lovastatin.The optimal temperature-shift cultivation was 2days culture at 30℃followed with 7days at 26℃to increase the production of acid form Monacolin K.By this culture conditions, the proportion of acid form Monacolin K in total Monascus products reached to 87% and it was 2.63times of the ratio produced with constant temperature cultivation at 26℃.Comparing with basic culture medium, additional 8% xylose, 3% peptone, 0.2% NaNO3, 0.2% KH2PO4and 0.35% MgSO4added into the basic medium was the optimal composition that produced the highest amount of Lovastatin compounds with the culture conditions in 6%inoculums size, 160rmin-1 rotate speed at the optimal temperature-shift cultivation.The ratio of acid form Monacolin K was 18times of it produced by the basic medium.
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Key words:
- Monascus spp. /
- Monacolin K /
- Lovastatin /
- proportion of acid form /
- liquid culture
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