Effect of exogenous NO on H2O2 metabolism in postharvest mango fruit under low temperature stress.
Yang Yang, Shen Lin, Sheng JiPing, Wang FengZhong, Wang Feng, Fan Bei
Author Affiliation: Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
Journal of Agricultural Science and Technology (Beijing) 15 : 131-136
Abstract : Nitric oxide (NO) is an important signal molecule in plants. In order to discuss the effect of NO on H2O2 level and metabolism in postharvest mango fruit under low temperature stress, 0.08 mmol/L NO donor SNP and 30 µL/L NO gas were used to treat green mango fruit before cold storage. H2O2 content and the activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) and ascorbate peroxidase (APX) were measured 12 d after cold storage at 3°C. The results showed that both SNP and NO gas treatments had significantly reduced H2O2 level in postharvest mango fruit pericarp, and increased the activities of SOD, CAT and POD. The effect of SNP was more significant than NO gas. The main effect site of exogenous NO was pericarp.