Effect of nitric oxide fumigation on the post harvest active oxygen metabolism of tomato
Tomato(Lycopersicon esculenturn CV Hezuo903) was used as test material,exogenous NO fu-migation treatment with different concentration(20,50μL/L) was used to study the effects of NO on respiration intensity,ethylene production and the active oxygen metabolism index of SOD,CAT,POD,H2O2,O2-.,MDA etc in tomato. The results showed that exogenous NO fumigation treatment inhibit the respiration rate and ethylene production of tomato during the storage period. In the meantime,NO treatment kept the activities of the protective enzyme,such as SOD,CAT,POD of tomato during storage,inhibit the increase of H2O2,O2-.,and reduced the content of MDA. NO fumigation treatment enhanced the antioxidant ability of tomato,prevented lipid membrane peroxidation and delayed the fruit senescence.