玉米籽粒次生代谢物质分布及其抗氧化活性  

Secondary Metabolite Distribution and Antioxidant Activities of Corn Kernel

作　　者：翟小童[1,2] 韩林 乔聪聪 何财安 刘芳 杨小霁[3] 李珊 谭斌 王敏 ZHAI Xiaotong;HAN Lin;QIAO Congcong;HE Cai’an;LIU Fang;YANG Xiaoji;LI Shan;TAN Bin;WANG Min(College of Food Science and Engineering,Northwest A&F University,Yangling 712100,China;Academy of National Food and Strategic Reserves Administration,Beijing 100037,China;Xi’an Aiju Grain and Oil Industrial Group Co.Ltd.,Xi’an 710026,China)

机构地区：[1]西北农林科技大学食品科学与工程学院,陕西杨凌712100 [2]国家粮食和物资储备局科学研究院,北京100037 [3]西安爱菊粮油工业集团有限公司,陕西西安710026

出　　处：《食品科学》2023年第2期296-303,共8页Food Science

基　　金：陕西省科技厅项目(2020ZDLNY05-07);“十三五”国家重点研发计划项目(2018YFC1602105)。

摘　　要：基于玉米分层剥皮技术,结合靶向代谢组学检测方法,对玉米不同部位的类胡萝卜素等特征性成分及酚类物质等次生代谢物质进行分析,并探讨其抗氧化活性。结果表明:类胡萝卜素主要存在于玉米籽粒的糊粉层和外胚乳中;玉米酚类物质主要以结合态形式存在于果皮、种皮及糊粉层部位,各部位共检出单体特征酚17种,其中香草醛、对羟基苯甲酸、阿魏酸等含量较高;玉米籽粒各部位的抗氧化活性与其酚类物质含量极显著正相关(P<0.01),其中单体特征酚的贡献主要来自于香草醛、对羟基苯甲酸和丁香醛,玉米内皮层的抗氧化活性相对更高。Layered milling technique combined with targeted metabolomics was applied to analyze the characteristic components including carotenoids and secondary metabolites including phenolic compounds from different parts of corn kernel,and the antioxidant activities of these parts were studied.The results showed carotenoids mainly existed in the aleurone layer and peripheral endosperm of corn kernel,while phenolic compounds existed in the pericarp,seed coat and aleurone layer mostly in a bound form.Totally 17 free phenolic acids were detected in each separated part,with the most abundant ones being vanillin,4-hydroxybenzoic acid and ferulic acid.The antioxidant activity of each part of corn kernel was positively correlated with the contents of phenolic compounds(P<0.01),and at individual phenolic acid level,vanillin,4-hydroxybenzoic acid and syringaldehyde were the major contributors to the antioxidant activity of corn kernel.The antioxidant activity of the inner bran layer was relatively higher than that of the other parts.

关 键 词：玉米籽粒 分层剥皮 次生代谢物质 酚类植物化学素 类胡萝卜素 抗氧化活性 

分 类 号：TS210.1[轻工技术与工程—粮食、油脂及植物蛋白工程]