Research on the mechanism of Na plus promoting the degradation of lignocellulose in salt-alkali alfalfa silage

文献类型： 外文期刊

第一作者： Qi, Boyi

作者： Qi, Boyi;Pan, Yongxiang;Shi, Jinhong;Lu, Qiang;Hou, Meiling;Sa, Duowen

作者机构：

关键词： Sodium ions; Lignocellulose; Glycoside hydrolases; Microbial community

期刊名称：INDUSTRIAL CROPS AND PRODUCTS （ 影响因子：6.2； 五年影响因子：6.2 ）

ISSN： 0926-6690

年卷期： 2025 年 235 卷

页码：

收录情况： SCI

摘要： Soil salinization seriously affects the development of agricultural and biotechnology applications, limiting the effective degradation of lignocellulose by solid-state fermentation (SSF) systems. We investigated the effects of sodium ion (Na*) on cellulase activity and microbial community dynamics during lignocellulose fermentation by Lactococcus lactis YM8. This study explored how Na* affect cellulase activity and microbial communities during alfalfa silage fermentation. The addition of Na* increased cellulase activity from 25.3 IU/g to 32.9 IU/g (a 30 % increase), reduced cellulose content by 15 %, and significantly enhanced lignin degradation. Na* also promoted the growth of cellulolytic bacteria (Bacillus, Cellulomonas, and Paenibacillus) and enriched glycoside hydrolase families GH1 and GH13.31. Mechanistic studies revealed that Na* supplementation not only optimizes cellulase activity but also modulates microbial interactions, promoting a more efficient lignocellulose degradation process. These findings highlight Na* as a key modulator in improving biomass degradation under saline conditions and enhancing applications in biofuel production and animal feed.

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