摘要
探究壳聚糖协同次氯酸盐对北碚447锦橙贮藏期间酶活性及质构的影响.以北碚447锦橙作为试验材料,对贮藏过程中果实的果皮和果肉硬度、失重率、丙二醛(MDA)摩尔质量浓度、超氧化物歧化酶(SOD)活性和过氧化氢酶(CAT)活性变化进行了测定.总体上,在贮藏中后期,各个壳聚糖处理组的果皮和果肉硬度,SOD和CAT活性均高于对照组,MDA摩尔质量浓度低于对照组;贮藏第30d,1%壳聚糖+200mg/L Ca(ClO)2组的果皮和果肉硬度,SOD和CAT活性显著高于对照组(p<0.05),其值分别为706±19.1N/g,203.5±4.0N/g,249.8±7.5U/g,310±20mg/(g·min);MDA摩尔质量浓度显著低于对照组(p<0.05),其值为0.090±0.02μmol/g.综合考虑,得出1%壳聚糖+200mg/L Ca(ClO)2处理组能维持较高的果实硬度,降低MDA摩尔质量浓度,提高SOD和CAT的活性,有利于北碚447锦橙的贮藏保鲜.
This study was made to investigate the effects of chitosan combined with hypochlorite on the post-harvest physiology and texture of citrus（Citrus sinensis L.Osbeck cv.Jincheng 447）fruit.Chitosan treatments were applied to the harvested citrus fruit,and indexes including firmness of peel and pulp,and malondialdehyde（MDA）content,and activities of superoxide dismutase（SOD）and catalase（CAT）were analyzed.Generally,during the middle and later periods of storage,the peel and pulp firmness of chitosantreated groups and their SOD and CAT activities were higher than those of the control group,and MDA content were lower than those of the control group.Determined on the 30 th day,the treatment of 1%chitosan in combination with 200 mg/L Ca（ClO）2 showed significant differences from the control group and its the peel firmness,pulp firmness,SOD and CAT were higher than those of the control,being 706±19.1 N/g,203.5±4.0 N/g,249.8±7.5 U/g and 310±20 mg/（g·min）,respectively.Its MDA content were lower than those of the control,being 0.090±0.02μmol/g.1% Chitosan used in combination with200 mg/L Ca（ClO）2 helped to maintain the peel and pulp firmness of citrus fruit,enhance its activities of SOD and CAT and reduce its MAD content,and its good for citrus（Citrus sinensis L.Osbeck cv.Jincheng 447）fruit storage.
作者
马雨熙
宁晓强
张玉
冯西娅
MA Yu-xi;NING Xiao-qiang;ZHANG Yu;FENG Xi-ya(School of Food Science,Southwest University,Chongqing 400715,China;Food Science and Engineering Teaching Demonstration Center at the National Level,Southwest University,Chongqing 400715,China;High School Affiliated to Southwest University,Chongqing 400700,China)
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2018年第8期32-38,共7页
Journal of Southwest University(Natural Science Edition)
基金
重庆市社会事业与民生保障科技创新专项(cstc2017shms-xdny80049)
重庆市北碚区集成示范计划项目(2014-68)
重庆市教学改革项目(153024)
西南大学科普创新项目
公益性行业(农业)科研专项(201303076-7)
关键词
壳聚糖
次氯酸盐
北碚447锦橙
酶活性
质构
chitosan
hypochlorite
Beibei 447 glorious orange
enzyme activity
texture
