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Accumulation of Water-Soluble Polysaccharides during Lychee Pulp Fermentation with Lactiplantibacillus plantarum Involves Endoglucanase Expression

文献类型：外文期刊

第一作者： Huang, Guitao

作者： Huang, Guitao;Zou, Xiaoqin;Dong, Lihong;Deng, Mei;Zhang, Ruifen;Huang, Fei;Zhang, Mingwei;Huang, Guitao;Zhang, Mingwei;Su, Dongxiao;Lee, Yuan-kun

作者机构：

关键词： lychee; polysaccharides; Lactobacillus; endoglucanase; galactosidase

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （影响因子：6.2；五年影响因子：6.4 ）

ISSN： 0021-8561

年卷期： 2025 年 73 卷 6 期

页码：

收录情况： SCI

摘要： In the current work, lychee pulp was subjected to Lactiplantibacillus plantarum ATCC 14917 fermentation, leading to a substantial increase (2.32-2.67-fold) in water-soluble polysaccharides (WSP). Concurrently, a significant degradation occurred in water-insoluble polysaccharides (WISP) composed of glucose (28.73%), arabinose (28.25%), galacturonic acid (25.07%), and galactose (11.00%). To clarify polysaccharide conversion and its relevant mechanism, carbohydrate-active enzyme encoding sequences in the L. plantarum ATCC 14917 genome and structural alterations of two polysaccharide fractions were dissected. By integrating the transcriptional assay, prokaryotic expression, and enzymic hydrolysis, three endoglucanases were demonstrated to catalyze WISP degradation, leading to WSP accumulation during lychee pulp fermentation with L. plantarum ATCC 14917. Reductions in proportions of galactose and galacturonic acid in WSPs were partly attributed to the actions of multiple galactosidases. These findings provide an enzyme-based explanation for WSP accumulation during Lactobacillus fermentation and serve as a practical foundation for directional polysaccharide conversion.

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