Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 64, Issue 22, Pages 4627-4632Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.6b01430
Keywords
longan (Dimocarpus longan Lour.); hydrogen peroxide; browning; energy status; respiration metabolism
Funding
- National Natural Science Foundation of China [30972070, 311711776]
- Natural Science Foundation of Fujian Province of China [2015J01608]
- Construction Projects of Top University at Fujian Agriculture and Forestry University of China [612014042]
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Energy status and respiration metabolism of Fuyan longan fruit treated by hydrogen peroxide (H2O2) and their relationship to pericarp browning were studied. The results displayed that H2O2 significantly increased the respiration rate, increased activities of respiratory terminal oxidases like cytochrome C oxidase (CCO) and ascorbic acid oxidase (AAO), decreased NAD kinase activity, maintained lower contents of NADP and NADPH as well as higher amounts of NAD and NADH, and accelerated the decrease of energy charge. These results gave convincing evidence that the treatment of H2O2 for accelerating longan pericarp browning was due to an increase of energy deficiency, an increase of respiratory metabolic pathways of EmbdenMeyerhof pathway (EMP) and tricarboxylic acid (TCA) cycle, a decrease of pentose phosphate pathway (PPP) of respiratory pathway, and an increase of activities of respiratory terminal oxidases like CCO and AAO.
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