Fruit quality and oxidoreductases activity of postharvest Ougan

Changes in quality and some physiological indices of the seeded Ougan(Citrus suavissima.Hort.ex Tanaka) in storage were studied.The SOD activity of the peel decreased prior to being activated.The contents of soluble sugar,reducing sugar,soluble solids and soluble protein of the flesh,the POD activity of the peel and flesh,and the SOD activity of the flesh increased at first and then decreased.The titratable acid,Vc and water content of the flesh showed a downward trend during the entire storage period.It suggested that the peel lagged behind the flesh into the senescence stage,but had a stronger antioxidant capacity,which might play an important role on anti-aging and the damage reduction by free radical oxygen.