核桃青皮多酚提取物对哈密瓜采后细胞壁代谢的影响  

Effect of Walnut Green Peel Polyphenol Extract on Cell Wall Metabolism of Postharvest Fruits of Hami Melon

作　　者：李慧 王新宇 毕莹 王雪 张琪 雷雅馨 黄帅 王静 LI Hui;WANG Xinyu;BI Ying;WANG Xue;ZHANG Qi;LEI Yaxin;HUANG Shuai;WANG Jing(College of Food Science and Pharmacy,Xinjiang Agricultural University,Urumqi 830052,Xinjiang,China;College of Food Science and Engineering,Xinjiang Institute of Technology,Aksu 843100,Xinjiang,China)

机构地区：[1]新疆农业大学食品科学与药学学院,新疆乌鲁木齐830052 [2]新疆理工学院食品科学与工程学院,新疆阿克苏843100

出　　处：《食品研究与开发》2025年第7期17-22,共6页Food Research and Development

基　　金：2022年中央财政林草科技推广示范项目(新[2022]TG11号);新疆维吾尔自治区自然科学基金面上项目(2022D01A80)。

摘　　要：为研究核桃青皮多酚提取物对哈密瓜果实贮藏期间细胞壁代谢的影响,以‘西州蜜25号’哈密瓜为试材,以蒸馏水为对照,采用30 mg/L核桃青皮多酚提取物处理哈密瓜果实,两组处理均加入0.5 mL/L吐温-20,浸泡20 min,常温[温度(22±2)℃,相对湿度(20±2)%]贮藏18 d。每3 d测定哈密瓜果实硬度、原果胶含量、可溶性果胶含量及细胞壁代谢相关酶活性。结果表明,30 mg/L核桃青皮多酚提取物处理能抑制哈密瓜果实硬度、原果胶含量下降,延缓可溶性果胶含量、多聚半乳糖醛酸酶(除第3天)、纤维素酶、果胶甲酯酶、β-葡萄糖苷酶(除第3天)、β-半乳糖苷酶的活性增强。由此说明核桃青皮多酚提取物能通过抑制哈密瓜采后细胞壁代谢相关酶活性的上升,进而延缓果实软化,维持果实硬度。The effect of walnut green peel polyphenol extract on the cell wall metabolism of Hami melon fruits during storage was studied.The fruits of the Hami melon variety′Xizhoumi 25′were treated with distilled water(control)or 30 mg/L walnut green peel polyphenol extract.Both groups were treated in corresponding liquid added with 0.5 mL/L Tween-20 for 20 min and then stored at room temperature[(22±2)℃]with the relative humidity of(20±2)%for 18 d.The hardness,propectin content,soluble pectin content,and activities of enzymes related to cell wall metabolism of Hami melon fruits were measured every 3 d.The results showed that the treatment with 30 mg/L walnut green peel polyphenol extract inhibited the decreases in fruit hardness and propectin content and delayed the increases in soluble pectin content and activities of polygalacturonase(PG)(except for day 3),cellulase(Cx),and pectin methylesterase,β-glucosidase(except for day 3),andβ-galactosidase.The walnut green peel polyphenol extract could delay fruit softening and maintain fruit hardness by inhibiting the increases in the activities of enzymes related to cell wall metabolism in postharvest fruits of Hami melon.

关 键 词：哈密瓜 核桃青皮多酚提取物 采后 细胞壁代谢 贮藏 

分 类 号：S652[农业科学—果树学]