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- 2018
壳聚糖协同次氯酸盐对采后北碚447锦橙质构及生理的影响
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Abstract:
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30 d，1%壳聚糖+200 mg/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±19.1 N/g，203.5±4.0 N/g，249.8±7.5 U/g，310±20 mg/（g·min）；MDA摩尔质量浓度显著低于对照组（p < 0.05），其值为0.090±0.02 μmol/g.综合考虑，得出1%壳聚糖+200 mg/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 chitosan-treated 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 30th 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±0.02 μmol/g. 1% Chitosan used in combination with 200 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
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