Improving saccharification of ramie stalks by synergistic effect of in-house cellulolytic enzymes consortium

文献类型： 外文期刊

第一作者： Cao, Cha

作者： Cao, Cha;Zhu, Zuohua;Xu, Chao;Gong, Wenbing;Zhou, Yingjun;Yan, Li;Hu, Zhenxiu;Xie, Chunliang;Peng, Yuande

作者机构：

关键词： Enzyme cocktail; Synergistic effect; Enzymatic hydrolysis; Carbon source; Ramie stalks

期刊名称：AMB EXPRESS （ 影响因子：4.126； 五年影响因子：4.245 ）

ISSN： 2191-0855

年卷期： 2022 年 12 卷 1 期

页码：

收录情况： SCI

摘要： The high cost of cellulase is one of the main obstacles hindering the large-scale biorefining of lignocellulosic biomass. Therefore, developing efficient method for preparation of cellulase is promising. In the present study, the production of cellulase by Trichoderma reesei, Trichoderma harzianum, and Aspergillus niger was optimized, and the synergistic effect of these cellulase on enzymatic hydrolysis of pretreated ramie stalks was also evaluated. The maximum CMCase (Carboxymethyl Cellulase) and filter paper activity (FPA) produced by T. reesei reached to 3.12 IU/mL and 0.13 IU/mL, respectively. The maximum activities of CMCase (3.68 IU/mL), FPA (0.04 IU/mL) and beta-glucosidase (8.44 IU/mL) were obtained from A. niger. The results also showed that under the premise of the same FPA activity, the contribution of beta-glucosidase activity to yield of reducing sugar was greater than that of CMCase. Besides, cellulase produced by T reesei and A. niger had the best synergistic effect on enzymatic hydrolysis of pretreated ramie stalks. The highest reducing sugars yield (417 mg/g dry substrate) was achieved when enzyme cocktail was prepared at the ratio of 1:1, which was 1.36-3.35 folds higher than that of different single enzymes. The present research has provided a novel method for efficient preparation of enzymes consortium for enzymatic hydrolysis of ramie stalks.

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