He Jing-Liu, Jiang Kai-Xin, Wei Ting, Geng Jin-Lei, Zhao Zi-Fan, Feng Jing, Li Jie, Liu Hong-Yan, Lin Shang, Wu Ding-Tao
Department of Pharmacy and Laboratory Science, Ya'an Polytechnic College, Ya'an 625100, Sichuan, China.
College of Food Science, Sichuan Agricultural University, Ya'an 625014, Sichuan, China.
Food Chem X. 2025 Jun 29;29:102709. doi: 10.1016/j.fochx.2025.102709. eCollection 2025 Jul.
To utilize thinned young kiwifruit for potential industrial applications, this study compared structural properties and bioactivities of pectic polysaccharides isolated from three thinned young red-fleshed kiwifruit cultivars, including cv. 'Donghong', 'Hongshi', and 'Hongyang'. The results demonstrated that these young kiwifruit byproducts were rich in pectic polysaccharides, with extraction yields of 90.7-101.3 mg/g dry weight. Although their bound polyphenols (8.02-8.93 mg GAE/100 mg), esterification degrees (50.45-61.32 %), and molecular weights (7.44 × 10-8.51 × 10 Da) varied across cultivars, the glycosidic linkage patterns showed remarkable consistency, dominated by homogalacturonan (12.07-13.84 mol%) and rhamnogalacturonan-I (70.25-75.09 mol%) regions. Notably, all these pectic polysaccharides, particularly those isolated from the 'Donghong' cultivar, demonstrated notable antioxidant, antiglycation, prebiotic, and immunoenhancing activities . These findings indicate that thinned red-fleshed kiwifruit byproducts are rich sources of RG-I enriched pectic polysaccharides, with significant potential as functional food ingredients.
为了将疏果后的幼嫩猕猴桃用于潜在的工业应用，本研究比较了从三个疏果后的红肉幼嫩猕猴桃品种（包括‘东红’、‘红实’和‘红阳’）中分离得到的果胶多糖的结构特性和生物活性。结果表明，这些幼嫩猕猴桃副产物富含果胶多糖，提取率为90.7-101.3毫克/克干重。尽管它们的结合多酚（8.02-8.93毫克GAE/100毫克）、酯化度（50.45-61.32%）和分子量（7.44×10-8.51×10道尔顿）因品种而异，但糖苷键连接模式显示出显著的一致性，以同型半乳糖醛酸聚糖（12.07-13.84摩尔%）和鼠李糖半乳糖醛酸聚糖-I（70.25-75.09摩尔%）区域为主。值得注意的是，所有这些果胶多糖，尤其是从‘东红’品种中分离得到的那些，都表现出显著的抗氧化、抗糖化、益生元和免疫增强活性。这些发现表明，疏果后的红肉猕猴桃副产物是富含RG-I的果胶多糖的丰富来源，作为功能性食品成分具有巨大潜力。
