甘薯膳食纤维的物化性质及其对体内外铅离子清除能力的影响  

Study on Physico-chemical Properties of Dietary Fiber in Sweet Potato and Its Capacity of Scavenging Lead Ion in vitro and vivo

作　　者：张毅[1] 王洪云[1] 钮福祥[1] 孙健[1] 徐飞[1] 朱红[1] 岳瑞雪[1] 张文婷 

机构地区：[1]江苏徐淮地区徐州农业科学研究所/中国农业科学院甘薯研究所,江苏徐州221131

出　　处：《江西农业学报》2017年第12期87-92,共6页Acta Agriculturae Jiangxi

基　　金：国家现代农业产业技术体系建设专项资金(CARS-10-B20);江苏省徐州市农业科学院科研基金(2015001);江苏省苏北计划专项项目(SZ-XZ2017034)

摘　　要：以徐薯32号和徐紫薯8号为材料,采用超声辅助酶解法提取甘薯膳食纤,比较其组分、物化性质及铅离子清除能力,为预防铅中毒提供理论基础和生物学证据。结果表明:徐紫薯8号膳食纤维样品中总膳食纤维含量明显高于徐薯32号,而前者可溶膳食纤维和不溶膳食纤维比值明显低于后者。徐薯32号膳食纤维的持水性、持油性、膨胀性和葡萄糖吸收能力显著高于徐紫薯8号膳食纤维。2种甘薯膳食纤维均具有较强的铅吸收能力,并且中性条件下对铅离子的吸附能力强于酸性条件下。徐薯32号膳食纤维具有较强的体外铅离子的清除能力,而徐紫薯8号膳食纤维则对铅中毒小鼠具有更强的体内铅离子清除能力。Dietary fiber （DF）was extracted from two sweet potato varieties by the ultrasonic-assisted enzymatic hydrolysismethod. The compositions,physico-chemical properties and lead-scavenging capacities of DF from two sweet potato varieties werecompared,in order to provide theoretical basis and biological evidence for the prevention of lead poisoning. The results indicatedthat：the content of total dietary fiber in Xuzishu No. 8 DF sample was obviously higher than that in Xushu No. 32 DF sample;however,the ratio of soluble dietary fiber to insoluble dietary fiber in Xuzishu No. 8 DF sample was evidently lower than that inXushu No. 32 DF sample. Furthermore,the water-holding capacity,oil-holding capacity,swelling capacity and glucose-absorbing ability of Xushu No. 32 DF were significantly higher than those of Xuzishu No. 8 DF. These two kinds of sweet potato DF had astrong capacity of absorbing lead ion,and this capacity under neutral condition was stronger than that under acidic condition.Xushu No. 32 DF had a stronger capacity of scavenging lead ion in vitro,while Xuzishu No. 8 DF had a stronger capacity of scavenging lead ion in lead-poison mice.

关 键 词：甘薯 膳食纤维 物化性质 铅离子清除能力 

分 类 号：S531[农业科学—作物学]