(Forssk.) Vierh. is a highly salt-tolerant mangrove, and its fruit has been traditionally used for treating constipation and dysentery. In this study, a pectin (AMFPs-0-1) was extracted and isolated from this fruit for the first time, its structure was analyzed, and the effects on the human gut microbiota were investigated. The results indicated that AMFPs-0-1 with a molecular weight of 798 kDa had a backbone consisting of alternating →2)-α-L-Rha-(1→ and →4)-α-D-GalA-(1→ residues and side chains composed of →3-α-L-Ara-(1→-linked arabinan with a terminal β-L-Ara, →5-α-L-Ara-(1→-linked arabinan, and →4)-β-D-Gal-(1→-linked galactan that linked to the C-4 positions of all α-L-Rha residues in the backbone. It belongs to a type I rhamnogalacturonan (RG-I) pectin but has no arabinogalactosyl chains. AMFPs-0-1 could be consumed by human gut microbiota and increase the abundance of some beneficial bacteria, such as , , and , which could help fight digestive disorders. These findings provide a structural basis for the potential application of fruit RG-I pectic polysaccharides in improving human intestinal health.

中文翻译：

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白骨壤果 RG-I 果胶作为潜在益生元的结构分析和体外发酵特性


（福斯克。）维尔。是一种高度耐盐的红树林，其果实传统上用于治疗便秘和痢疾。本研究首次从这种水果中提取分离出果胶（AMFPs-0-1），分析其结构，并研究其对人体肠道菌群的影响。结果表明，分子量为 798 kDa 的 AMFPs-0-1 的主链由交替的 →2)-α-L-Rha-(1→ 和 →4)-α-D-GalA-(1→ 残基组成侧链由 →3-α-L-Ara-(1→-连接的阿拉伯聚糖和末端 β-L-Ara、 →5-α-L-Ara-(1→-连接的阿拉伯聚糖和 →4)- 组成β-D-Gal-(1→-连接的半乳​​聚糖，与主链中所有 α-L-Rha 残基的 C-4 位置连接。它属于 I 型鼠李半乳糖醛酸 (RG-I) 果胶，但没有阿拉伯半乳糖基链AMFPs-0-1 可以被人类肠道微生物群消耗，并增加一些有益细菌的丰度，例如 、 和 ，这有助于对抗消化系统疾病。这些发现为水果 RG-I 的潜在应用提供了结构基础。果胶多糖改善人体肠道健康。