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钱书意,张红颖,张洋洋,关文强,陈啟永,刘 斌.短波紫外线照射对白玉菇采后贮藏品质的影响[J].保鲜与加工,2018,18(2):25~30
短波紫外线照射对白玉菇采后贮藏品质的影响
Effect of UV-C Irradiation on Postharvest Quality of White Hypsizygus marmoreus
  
DOI:
中文关键词:  白玉菇  短波紫外线  剂量  贮藏品质  保鲜
英文关键词:white Hypsizygus marmoreus  UV-C  dose  storage quality  fresh-keeping
基金项目:天津市自然科学基金重点项目(16JCZDJC34000);国家自然科学基金(31271949);天津市科技计划项目(17ZXYENC00150)
作者单位
钱书意 天津市食品生物技术重点实验室天津商业大学生物技术与食品科学学院 
张红颖 北辰区种植业发展服务中心 
张洋洋 天津市食品生物技术重点实验室天津商业大学生物技术与食品科学学院 
关文强 天津市食品生物技术重点实验室天津商业大学生物技术与食品科学学院 
陈啟永 天津绿圣蓬源农业科技开发有限公司 
刘 斌 天津市制冷技术重点实验室 
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中文摘要:
      以白玉菇为试材,贮藏于4 ℃条件下,分别采用0(对照组CK)、0.5、1.0、2.0 kJ/m2剂量的UV-C进行照射,定期测定白玉菇颜色、多酚氧化酶(PPO)活性、总酚含量及DPPH自由基(DPPH·)清除率等指标,探讨短波紫外线(UV-C)照射对白玉菇采后贮藏品质的影响,为UV-C技术应用于白玉菇保鲜提供理论依据。结果表明,0.5、1.0 kJ/m2的UV-C处理可有效保持白玉菇白度、促进总酚的合成和积累,提高抗氧化物活性并抑制PPO活性的升高。其中1.0 kJ/m2处理组白玉菇的DPPH·清除率和总酚含量显著高于0.5 kJ/m2 UV-C处理组和CK组(P<0.05),而经2.0 kJ/m2 UV-C照射后白玉菇的L*值、DPPH·清除率和总酚含量均出现明显下降。贮藏21 d后,1.0 kJ/m2 UV-C处理组白玉菇感官品质显著高于CK组(P<0.05),贮藏期延长7 d以上。适宜剂量UV-C处理可提高采后白玉菇保鲜效果,但照射剂量过大会对白玉菇造成损伤,1.0 kJ/m2 UV-C处理的综合保鲜效果较好。
英文摘要:
      Influences of shortwave ultraviolet-C(UV-C) on storage quality of white Hypsizygus marmoreus were studied for providing scientific basis of UV-C application in fresh-keeping of white Hypsizygus marmoreus. White Hypsizygus marmoreus stored at 4 ℃ was irradiated with the radiation dose of 0, 0.5, 1.0 and 2.0 kJ/m2, respectively. Color, activity of polyphenol oxidase(PPO), total phenol content and DPPH free radicals(DPPH·) scavenging rate were measured periodically during storage. The results indicated that 0.5 and 1.0 kJ/m2 doses of UV-C treatments could effectively maintain the whiteness, promote the synthesis and accumulation of total phenol, enhance the antioxidant activity and inhibit the increase of PPO activity. DPPH· scavening rate and total phenol content of the mushrooms in 1.0 kJ/m2 UV-C treatment group were significantly higher than those in 0.5 kJ/m2 and CK groups(P<0.05). However, L* value, DPPH· scavenging rate and total phenol content of white Hypsizygus marmoreus treated by 2.0 kJ/m2 UV-C obviously reduced. After 21 days of storage, sensory quality of white Hypsizygus marmoreus treated by 1.0 kJ/m2 UV-C was significantly higher than that of the control(P<0.05), the storage period was prolonged for more than 7 days. In conclusion, the suitable dose of UV-C treatment could maintain storage quality of white Hypsizygus marmoreus, while too high dose of irradiation would cause damage. 1.0 kJ/m2 dose of UV-C treatment had the best preservation effect.
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