植酸处理对冷藏期间紫背天葵品质的影响  

Effect of phytic acid on Gynura bicolor D.C quality during cold storage

作　　者：姜丽[1] 冯莉[1] 侯田莹[2] 郁志芳[1] 

机构地区：[1]南京农业大学食品科技学院,江苏南京210095 [2]北京市农林科学院蔬菜研究中心,北京100097

出　　处：《食品工业科技》2015年第7期336-341,共6页Science and Technology of Food Industry

基　　金：国家自然科学基金基金青年科学基金项目(31301576);中央高校基本科研业务费专项资金(KJQN201428;KYZ201319)

摘　　要：以紫背天葵为试材,采用不同浓度植酸(0、0.1、0.5和1mmol/L)处理并于低温下(10℃)晾干叶片表面明水,HDPE袋(15μm厚)挽口包装(500g/袋),并置于0℃下贮藏15d,每5d测定一次品质指标:腐烂指数、呼吸强度、花青素、叶绿素、氨基酸、总酚、游离酚、蛋白质、总糖和还原糖。结果表明,0.5mmol/L植酸处理组可有效抑制紫背天葵呼吸作用,减缓花青素的损失而有效保持其含量,保持较高的叶绿素含量,有效抑制总酚、游离酚、还原糖、总糖、氨基酸和蛋白质含量的降低,有效延长紫背天葵货架期。1.0mmol/L植酸处理组会对紫背天葵叶片产生灼伤,加速品质劣变。The effect of phytic acid（PA,0,0.1 ,0.5 and 1mmol/L）on the preservation and nutritional quality of fresh Gynura bicolor DC.（ G.bicolor）were investigated during cold storage.Both experimental and control samples were wrapped in 15μm thick high- density polypropylene （HDPE） bags （500g/bag） and stored at 0℃ for 15d. The nutrition and quality indices, including decay, respiration rate, anthocyanin, chlorophyll, amino acid, protein, total carbohydrate, and reducing sugar were tested every 5d. The results showed that 0.5mmol/L PA treatments significantly inhibited G.bicolor respiration and maintained higher contents of anthocyanin, chlorophyll, amino acid, total phenolics,free phenol, protein, total carbohydrate, and reducing sugar. Therefore,0.5mmol/L PA treatment was potentially applicable in extending the storage life of G. bicolor while 1.0mmol/L PA could accelerate the deterioration of G.bicolor quality.

关 键 词：紫背天葵 植酸 采后保鲜 生理品质 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程]