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高效降解茶皂素菌株的分离鉴定及其发酵优化研究

Journal of the Chinese Cereals and Oils Association(2019)

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Abstract
从自然发酵的油茶饼粕中筛选到一株对油茶饼粕中茶皂素具有较强的降解能力的菌株L-2.通过菌株的形态学鉴定和ITS rDNA序列分析确定该菌株的系统发育地位.研究固态发酵中发酵时间、发酵温度、初始含水量和初始加酸量对该菌株降解油茶饼粕中的茶皂素的影响.结果表明:菌株L-2为黑曲霉(Aspergillus niger),经过单因素实验和响应面实验优化后的最适降解条件为发酵温度31.3℃,发酵时间103.5 h,初始加酸量4.57 mL,初始含水量80%,此时黑曲霉L-2对油茶饼粕中茶皂素的降解率为93.96%.
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