由于其多种益处，荞麦绿叶常常被用作功能茶材料。尽管荞麦绿叶富含可溶性膳食纤维（SDFs），但关于其结构特性和功能特性的信息仍然未知，这在很大程度上阻碍了其作为功能/保健产品的应用。因此，为了增强荞麦绿叶中SDFs的用途和应用作为增值保健产品，比较研究了来自不同荞麦绿叶的SDFs的结构和生物活性。结果显示，来自苦荞绿叶（TBSDF）和普通荞麦绿叶（CBSDF）的SDFs富含复杂的果胶多糖，主要由均聚半乳糖醛酸醇（HG）和鼠李糖半乳糖醛酸醇Ⅰ（RG I）果胶结构域组成。此外，TBSDF中RG I果胶结构域的比例高于CBSDF。此外，TBSDF和CBSDF中存在高含量的复杂果胶多糖，可以贡献于各种生物活性，如抗氧化、抗糖基化、结合脂肪/胆汁酸、抗癌和益生等效应。这些结果可以为进一步开发荞麦绿叶及其相关SDFs作为增值保健产品提供新的见解。版权 © 2023。Elsevier B.V.发表。

Buckwheat green leaves are commonly consumed as functional tea materials due to their various beneficial effects. Although buckwheat green leaves have abundant soluble dietary fibers (SDFs), the information about their structural properties and functional properties remains unknown, largely hindering their applications as functional/health products. Hence, to enhance the usage and application of SDFs from buckwheat green leaves as value-added health products, the structures and biological activities of SDFs derived from different buckwheat green leaves were investigated and compared. Results revealed that SDFs derived from Tartary buckwheat green leaves (TBSDF) and common buckwheat green leaves (CBSDF) were rich in complex pectic-polysaccharides, mainly composing of homogalacturonan (HG) and rhamnogalacturonan I (RG I) pectic domains. Besides, TBSDF had higher proportion of RG I pectic domains than that of CBSDF. Furthermore, the existence of a high content of complex pectic-polysaccharides in TBSDF and CBSDF could contribute to their various biological activities, such as antioxidant, antiglycation, fat/bile acid binding, anticancer, and prebiotic effects. These results can provide some new insights into further development of buckwheat green leaves and related SDFs as value-added health products.Copyright © 2023. Published by Elsevier B.V.