title: Short UV-B Exposure Stimulated Enzymatic and Nonenzymatic Antioxidants and Reduced Oxidative Stress of Cold-Stored Mangoes.
abstract: The effects of UV-B irradiation on reactive oxygen species (ROS) levels, antioxidant compound contents, antioxidative enzyme activities, and oxidative damage of cold-stored mangoes were examined. Superoxide anion production rate, hydrogen peroxide concentration, ion leakage level and malondialdehyde content of the cold-stored fruit preradiated with 5 KJ m(-2) UV-B for 4 h were significantly decreased as compared with control fruit. The activities of ROS generating enzymes remained unchanged in UV-B-irradiated mangoes as compared to the control, but superoxide dismutase and catalase activities, ascorbate and polyphenol contents and antioxidant capacities of the cold-stored mangoes were significantly enhanced by UV-B. The UV-B-enhanced antioxidant compounds and antioxidative enzymes were highly correlated with the reduced-ROS levels in UV-B-irradiated mangoes. The data indicated that a short UV-B exposure reduced oxidative stress and alleviated oxidative damage of the cold-stored mangoes by triggering both enzymatic and nonenzymatic antioxidant systems although ROS generation in the fruit was not affected.
authors.affiliation: Key Laboratory for Quality and Safety of Agricultural Products of Hangzhou City, College of Life and Environmental Sciences and ‡Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medical Plants, College of Life and Environmental Sciences, Hangzhou Normal University , Hangzhou 310036, China.
authors.forename: Zhifang
authors.initials: Z
authors.lastname: Jiang
authors.affiliation: Key Laboratory for Quality and Safety of Agricultural Products of Hangzhou City, College of Life and Environmental Sciences and ‡Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medical Plants, College of Life and Environmental Sciences, Hangzhou Normal University , Hangzhou 310036, China.
authors.forename: Yaoqi
authors.initials: Y
authors.lastname: Zheng
authors.affiliation: Key Laboratory for Quality and Safety of Agricultural Products of Hangzhou City, College of Life and Environmental Sciences and ‡Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medical Plants, College of Life and Environmental Sciences, Hangzhou Normal University , Hangzhou 310036, China.
authors.forename: Rongrong
authors.initials: R
authors.lastname: Qiu
authors.affiliation: Key Laboratory for Quality and Safety of Agricultural Products of Hangzhou City, College of Life and Environmental Sciences and ‡Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medical Plants, College of Life and Environmental Sciences, Hangzhou Normal University , Hangzhou 310036, China.
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Yang
authors.affiliation: Key Laboratory for Quality and Safety of Agricultural Products of Hangzhou City, College of Life and Environmental Sciences and ‡Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medical Plants, College of Life and Environmental Sciences, Hangzhou Normal University , Hangzhou 310036, China.
authors.forename: Mingfeng
authors.initials: M
authors.lastname: Xu
authors.affiliation: Key Laboratory for Quality and Safety of Agricultural Products of Hangzhou City, College of Life and Environmental Sciences and ‡Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medical Plants, College of Life and Environmental Sciences, Hangzhou Normal University , Hangzhou 310036, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Ye
authors.affiliation: Key Laboratory for Quality and Safety of Agricultural Products of Hangzhou City, College of Life and Environmental Sciences and ‡Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medical Plants, College of Life and Environmental Sciences, Hangzhou Normal University , Hangzhou 310036, China.
authors.forename: Maojun
authors.initials: M
authors.lastname: Xu
mesh_terms: D000975:Antioxidants / Q000032:analysis*; D002374:Catalase / Q000378:metabolism; D005514:Food Irradiation; D005519:Food Preservation / Q000379:methods*; D005638:Fruit / Q000737:chemistry* / Q000201:enzymology / Q000528:radiation effects; D006861:Hydrogen Peroxide / Q000032:analysis; D008315:Malondialdehyde / Q000032:analysis; D031022:Mangifera; D018384:Oxidative Stress / Q000528:radiation effects*; D017382:Reactive Oxygen Species / Q000032:analysis; D013482:Superoxide Dismutase / Q000378:metabolism; D013481:Superoxides / Q000032:analysis; D014466:Ultraviolet Rays
chemical_list: D000975:Antioxidants; D017382:Reactive Oxygen Species; D013481:Superoxides; D008315:Malondialdehyde; D006861:Hydrogen Peroxide; D002374:Catalase; D013482:Superoxide Dismutase
keywords: UV-B; antioxidants; cold damage; mango; reactive oxygen species (ROS)