文献类型： 外文期刊
第一作者： You, C. H.
作者： You, C. H.;Wang, J. B.;Shuai, L.;Fang, X. D.;Wu, Z. X.;Han, D. M.
作者机构：
关键词： longan (Dimocarpus longan Lour.);precooling;ROS metabolism
期刊名称：IV INTERNATIONAL SYMPOSIUM ON LYCHEE, LONGAN AND OTHER SAPINDACEAE FRUITS
ISSN： 0567-7572
年卷期： 2014 年 1029 卷
页码：
收录情况： SCI
摘要： Effects of cold room precooling and ice water precooling on storage and reactive oxygen species (ROS) metabolism of longan (Dimocarpus longan Lour.) fruit were studied. Changes of pericarp browning index, pericarp moisture content, activities of relative enzymes of ROS metabolism and contents of pulp total soluble solids (TSS), titratable acid (TA) and vitamin C (Vc) during storage were measured. The results indicated that cold room precooling and ice water precooling can maintain pericarp moisture content and decrease pericarp browning index, but have little effect on contents of TSS, TA and Vc. After cold room precooling and ice water precooling, activities of peroxidase (POD) in the pericarp and pulp of longan were inhibited. Activities of superoxide dismutase (SOD) increased in the pericarp but were inhibited in the pulp of precooled fruit. Precooling treatments also inhibited the content of hydrogen peroxide (H2O2) in longan pulp. Anti-superoxide anion activities in longan pulp were increased in cold room precooling but decreased in ice water precooling. Postharvest ice water precooling of longan fruit can maintain high scavenging activities of the superoxide anion and less ROS content, delay fruit aging, maintain quality and improve storage life.
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