食品科学

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1-MCP对水蜜桃冷藏品质和氧化还原水平的影响

千春录,米红波,何志平,赵宇瑛,茅林春   

  1. 1.浙江大学生物系统工程与食品科学学院,浙江 杭州 310058;2.浙江农林大学农业与食品科学学院,浙江 临安 311300;
    3.长江大学园艺园林学院,湖北 荆州 434025
  • 出版日期:2013-06-25 发布日期:2013-06-17

Effect of 1-MCP on Cold Storage Quality and Redox State of Postharvest Peach Fruits

QIAN Chun-lu,MI Hong-bo,HE Zhi-ping,ZHAO Yu-ying,MAO Lin-chun   

  1. 1. School of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China;
    2. School of Agricultural and Food Science, Zhejiang Agricultural and Forest University, Lin’an 311300, China;
    3. College of Horticulture and Garden, Yangtze University, Jingzhou 434025, China
  • Online:2013-06-25 Published:2013-06-17

摘要:

为探讨1-甲基环丙烯(1-MCP)处理对‘艳红’水蜜桃在冷藏及其后货架条件下的贮藏品质及其氧化还原状态的影响。采用0、0.25、0.5、1μL/L的1-MCP对桃果实进行处理,然后置于(4±1)℃中贮藏21d,并置于(20±1)℃中3d。结果表明:1-MCP处理可以显著降低桃果冷藏及货架期间的乙烯释放量和呼吸强度,保持果实硬度和颜色,抑制质量损失率和电导率上升,其中1μL/L的1-MCP处理效果最为显著(P<0.05)。1-MCP处理保持了果皮和果肉抗坏血酸含量和其还原状态;抑制了果皮谷胱甘肽含量和其还原状态上升,而促进其在果肉中下降。综合得知,所有处理中1μL/L的1-MCP对水蜜桃果实保鲜效果最佳,1-MCP处理提高了桃果的抗氧化能力,从而改善果实的冷藏品质。

关键词: 桃, 1-甲基环丙烯, 冷藏品质, 氧化还原状态

Abstract:

In order to explore the effect of 1-methylcyclopropene (1-MCP) treatment on the quality and redox state of peach
fruits, ‘Yanhong’ peach fruits were treated with 0, 0.25, 0.5 μL/L and 1 μL/L 1-MCP, and stored at (4 ± 1) ℃ for 21 days
and then transferred to (20 ± 1) ℃ for 3 days. The results indicated that 1-MCP treatment reduced respiration rate, ethylene
production, weight loss rate and electrolyte leakage, and remarkably kept fruit firmness and color. The 1-MCP treatment
at a dose of 1 μL/L had the most significant effect (P < 0.05). Meanwhile, 1-MCP treatment could maintain fruit peel and
flesh ascorbate (ASC) content and ASC/dehydroascorbate ratio, inhibit the increase of fruit peel glutathione (GSH)
content and GSH/ oxidized glutathione ratio, thus causing the decrease of these in fruit flesh. In conclusion, the 1-MCP
treatment at 1 μL/L showed the most significant benefit to peach cold storage, which may be related to antioxidant capacity.

Key words: peach, 1-methylcyclopropene (1-MCP), cold storage quality, redox state