Journal of Nuclear Agricultural Sciences ›› 2021, Vol. 35 ›› Issue (1): 103-110.DOI: 10.11869/j.issn.100-8551.2021.01.0103

• Food Irradiation·Food Science • Previous Articles     Next Articles

Effects of Combined Treatment of 1-MCP and 60Co-γ Irradiation With Modified Amosphere Package on Postharvest Quality of Loquat Fruits

CAO Sen1,2, GENG Fangjing1, BA Liangjie1,2, MA Chao1,2, JI Ning1,2, WANG Rui1,2,*, TAN Guoxia1   

  1. 1Guiyang College, Guiyang, Guizhou 550005;
    2Guizhou Engineering Research Center for Fruit Processing, Guiyang, Guizhou 550005
  • Received:2020-04-20 Online:2021-01-10 Published:2020-11-16
  • Supported by:
    贵州省科技计划项目[黔科合平台人才[2019]5644],贵阳学院科研资金【GYU-KY-(2021)】,2020年国家级大学生创新创业训练项目(202010976012)

1- MCP和60Co-γ辐照处理对自发气调包装大五星枇杷贮藏品质的影响

曹森1,2, 耿方静1, 巴良杰1,2, 马超1,2, 吉宁1,2, 王瑞1,2,*, 谭国霞1   

  1. 1贵阳学院, 贵州 贵阳 550005;
    2贵州省果品加工工程技术研究中心, 贵州 贵阳 550005
  • 通讯作者: *王瑞,男,教授,主要从事农产品贮藏与加工研究。E-mail:wangrui060729@126.com
  • 作者简介:曹森,男,副教授,主要从事农产品贮藏与加工研究。E-mail:cs5638myself@126.com

Abstract: In order to study the effects of combined treatment of 1-MCP and60Co-γ irradiation on postharvest quality of loquat fruits, the DAWUXING loquat fruits was used as the experimental material to determine the relevant indexes(decay index, lignin content, firmness, respiration rate, ethylene production rate, relative conductivity, titratable acid content, soluble solid content, PAL activity, LOX activity, PPO activity, POD activity). Postharvest loquat fruits with modified atmosphere package were divided into 4 treatments under (6±0.5)℃ conditions(1 μL·L-1 1-MCP treatment, 1.5 kGy60Co-γ treatment, 1 μL·L-1 1-MCP +1.5 kGy60Co-γ treatment, control treatment as CK). The results showed that: Among the different treatment, the quality of loquat fruits treated with the combination of 1-MCP and 60Co-γ irradiation was the best, which delayed the increase of loquat fruits decay index and lignin content, maintained the firmness of loquat fruit, decreased the ethylene production rate and the relative electric conductivity, kept the titratable acid (TA) and the total soluble solids(TSS) content of loquat fruits, and inhibited the rise of loquat fruits the activities of ascorbic acid peroxidase (PAL), lipoxygenase (LOX), polyphenol oxidase(PPO) and peroxidase (POD). The decay index of loquat fruits in group of 1-MCP +60Co-γ was only 17.95%, while those for 1-MCP,60Co-γ, and CK were 22.86%, 25.72%, and 36.24%, respectively, after stored for 40 days. Therefore, 1-MCP combined with60Co-γ irradiation treatment had the best fresh-keeping effect on the storage of loquat fruits. This study could provide theoretical basis for the storage and preservation of loquat fruits.

Key words: loquat fruits, 1-methylcyclopropene, 60Co-γ irradiation, storage quality

摘要: 为研究1-甲基环丙烯(1-MCP)熏蒸和60Co-γ辐照处理对枇杷贮藏品质的影响,本研究以大五星枇杷为试验材料,对采后自发气调包装枇杷的腐烂指数、木质素、硬度、呼吸强度、乙烯生成速率、相对电导率、可滴定酸(TA)、可溶性固形物(TSS)以及苯丙氨酸解氨酶(PAL)、脂氧合酶(LOX)、多酚氧化酶(PPO)、过氧化物酶(POD)活性进行测定,研究6±0.5℃条件下1 μL·L-1 1-MCP、1.5 kGy60Co-γ、1 μL·L-1 1-MCP+1.5 kGy 60Co-γ不同处理对枇杷贮藏品质的影响。结果表明, 1-MCP和60Co-γ复合处理效果最好,可延缓腐烂指数和木质素含量上升,维持果实硬度,降低果实呼吸强度、乙烯生成速率和相对电导率,保持果实TA和TSS含量,抑制PAL、LOX、PPO和POD活性的上升。在贮藏40 d时,1-MCP和60Co-γ复合处理枇杷的腐烂指数仅为17.95%,而1-MCP组、60Co-γ组、CK组分别为22.86%、25.72%和36.24%。因此,1-MCP和60Co-γ复合处理对枇杷果实的贮藏效果最好。本研究结果为枇杷的贮藏保鲜提供了理论依据。

关键词: 枇杷, 1-甲基环丙烯, 60Co-γ辐照, 贮藏品质