期刊
FOOD CHEMISTRY
卷 161, 期 -, 页码 16-21出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2014.03.120
关键词
Peach; Senescence; Respiratory activity; Mitochondrial membrane
资金
- National Natural Science Foundation of China [31371866]
- Natural Science Foundations of Jiangsu Province and Ningbo City [BK20131073, 2013A610155]
- Zhujiang Potential Talents Project [2011J2200019]
- Guangdong Natural Science Foundation [S2011020001156]
The effect of 3.0 KJ/m(2) We ultraviolet-C (UV-C) treatment on respiratory activity and mitochondrial membrane associated with fruit senescence in peach fruit stored at 20 degrees 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 (O-2(-)) 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 O-2(-) 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. (C) 2014 Elsevier Ltd. All rights reserved.
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