Abstract: Effects of Chinese herbal medicine extracts with different concentrations on the fruit quality and antioxidant enzyme activities of seedless"Shatang"mandarin were evaluated in this study. Results indicated that the treatments with Chinese herbal medicine extracts decrease rate of rot and fruit weight loss and retard the decreases of content of total soluble solids (TSS),titratable acidity (TA) and ascorbic acid. The"Shatang"mandarin treated with the 50-times diluted natural extract has the best fresh-keeping quality with good fruit rate 98% during storage of 40 days at room temperature, 10% higher than that of control, and the water loss rate only 1.88%. It is also showed that the activities of peroxidase (POD) and catalase (CAT) in peel are increased by Chinese herbal medicine extract during the initial 20 days, and the activity of superoxide (SOD) is reduced during later storage.

Key words: seedless", Shatang", mandarin； Chinese herbal medicine extract； fruit quality； antioxidant enzyme activity