Journal
POSTHARVEST BIOLOGY AND TECHNOLOGY
Volume 108, Issue -, Pages 21-27Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.postharvbio.2015.05.007
Keywords
Nitric oxide; Chilling injury; Energy metabolism; Banana fruit
Categories
Funding
- National Basic Research Program of China [2013CB127101]
- National Natural Science Foundation of China [31371856]
- Zhejiang Provincial Natural Science Foundation of China [LR13C200001]
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Effects of postharvest nitric oxide (NO) treatment on energy metabolism and chilling injury in cold-stored banana fruit were investigated. Banana fruit were treated with 0.05 mM NO donor sodium nitroprusside, and then stored at 7 degrees C for up to twenty days. NO treatment apparently inhibited the development of chilling injury. The contents of adenosine triphosphate (ATP) and energy charge in the NO-treated fruit were significantly higher than control fruit. Meanwhile, the activities of enzymes involved in energy metabolism, including H+-ATPase, Ca2+-ATPase, succinic dehydrogenase and cytochrome C oxidase were markedly enhanced by NO treatment. In addition, notably elevated activities of fructokinase, glucokinase, glucose-6-phosphate dehydrogenase and 6-phosphogluconate dehydrogenase were observed in NO-treated banana fruit. These results indicated that NO could enhance chilling tolerance of banana fruit through maintaining high levels of energy status and inducing enzyme activities involved in energy metabolism during cold storage. (C) 2015 Elsevier B.V. All rights reserved.
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