关键词: 番木瓜, 黄皮精油, 熏蒸果蒂, 保鲜

Abstract: To explore the fresh-keeping effect of pedicel fumigated by wampee oil on papaya under room temperature, this paper took the essential oil extracted from wampee leaves and distilled by vapour as material to fumigate the pedicel of papaya fruits (Risheng variety) (Carica papaya L.), and regularly determined the phisycal signs of appearance, and nutrition quality during storage under room temperature. Results showed that the essential oil extracted from wampee leaves could restrain the rising of fruit rot index under room temperature, slow down the losing of fruit moisture content, maintain the fruit firmness, total soluble solids (TSS), vitamin C(VC), and restrain the accumulation of malondiadehyde, and improve the superoxide dismutase (SOD) activity. But there was no obvious effect on relative electrolytic leakage. Among different treatments, 2 μL essential oil treatment had the best fresh-keeping effect. Varying degrees of phytotoxicities were generated on fruit, when the concentration of essential oil reached 3 μL and 4 μL. Therefore, papaya pedicel fumigated by wampee oil could effectively keep the fruit fresh under room temperature. This result has provided theoretical basis for using wampee oil as a safe, non-toxic, biological fresh-keeping agent.

Key words: Carica papaya L., wampee oil, pedicel fumigated, fresh-keeping