Abstract: In order to elucidate the effects of harvest time on active oxygen metabolism of Feijoa sellowiana fruit during storage and determine the best harvest time,the active oxygen metabolism and AsA-GSH cycle in mitochondria of Feijoa sellowiana pulp harvested at initial ripe stage （IRS,130 d after flowering）,full ripe stage （FRS,150 d after flowering） and excess ripe stage（ERS,170 d after flowering） were studied during the storage. The results showed that the H₂O₂ content and O₂^-· production rate in FRS fruits was significantly higher than those in IRS and ERS fruits during the late storage stage,but there were no significant difference before 6 d storage. At the same time,there were no significant changes in APX,DHAR,GR activities and AsA and GSH contents during the early stage of postharvest storage. After storage 9 d,the rapidly increasing trend in these indexes were showed and the biggest increasing rate was found in ERS fruits,followed by ERS fruits and FRS frruits. Therefore,in the case of active oxygen metabolism and AsA-GSH cycle during the fruit storage period,harvesting time had no significant difference on the F. sellowiana fruits in short-term storage,but for long-term storage,the full ripe stage（150 d after anthesis） was optimal harvesting time.

Key words: harvesting time, Feijoa sellowiana, mitochondria, active oxygen metabolism, AsA-GSH cycle