用户名: 密码: 验证码:
Effects of glycerol on pigments and monacolin K production by the high-monacolin K-producing but citrinin-free strain, Monascus pilosus MS-1
详细信息    查看全文
文摘
Glycerol is the principal by-product of biodiesel production which can be utilized by fungi for beneficial metabolites production. In this study, effects of glycerol on main metabolites production and gene expression of pigment and monacolin K (MK) synthesis-related genes of Monascus pilosus MS-1, a high-MK-producing but citrinin-free strain, were investigated. The results indicated that addition of glycerol could increase the dry cell weight but decrease the fermentation broth pH value. Pigments production could be enhanced significantly after adding 2?g/L glycerol and the maximum pigments yield (13.78 U/mL) of fermentation broth was obtained when the glycerol content was up to 40?g/L (p?Monascus pigment. MK yield of fermentation broth was decreased significantly when the glycerol addition was up to 10?g/L while that of mycelia could be improved as glycerol addition increased (p?ctnR) for pigment synthesis were 17.31- and 22.22-folds of ctnR in the control; the gene expressions of structural gene (PKS5) for pigment synthesis were 33.27- and 60.07-folds of PKS5 in the control; respectively. However, the gene expressions of regulatory (mkH) and structural (mkA) genes of MS-1 for MK production were decreased after adding glycerol. All this suggesting that glycerol can be used for improving production of citrinin-free Monascus pigments and MK.

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700