过氧化氢酶
衰老
超氧化物歧化酶
采后
化学
膜透性
抗氧化剂
过氧化物酶
细胞色素c氧化酶
过氧化氢
生物化学
活性氧
选择性氧化酶
线粒体
琥珀酸脱氢酶
酶
生物
园艺
膜
细胞生物学
作者
Ziyi Yang,Shifeng Cao,Xiaolu Su,Yueming Jiang
标识
DOI:10.1016/j.foodchem.2014.03.120
摘要
The effect of 3.0 kJ/m2 ultraviolet-C (UV-C) treatment on respiratory activity and mitochondrial membrane associated with fruit senescence in peach fruit stored at 20 °C for 8 days was investigated. UV-C treatment could reduce senescence development, as evidenced by higher fruit firmness due to inhibition of respiration rate via reducing succinic dehydrogenase and cytochrome C oxidase activity. Meanwhile, the activities of superoxide dismutase, catalase and ascorbate peroxidase in the UV-C-treated fruit were much higher than those in control fruit, resulting in lower levels of superoxide radicals (O2−) and hydrogen peroxide (H2O2). In addition, this treatment maintained a higher level of mitochondrial membrane fluidity and inhibited opening of mitochondrial permeability transition pore. Our results suggest that the induction of antioxidant enzymes to scavenge O2− and H2O2 by UV-C treatment was associated with the maintenance of mitochondrial membrane integrity, which also played an important role in senescence retardation in peach fruit.
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