PARK, KYUNG-JIN(Citrus research institute, National institute of horticultural and herbal science, RDA, Jeju 697-943, KOREA)AN, HYUN-JOO(Citrus research institute, National institute of horticultural and herbal science, RDA, Jeju 697-943, KOREA)KIM, SANG-SUK(Citrus research institute, National institute of horticultural and herbal science, RDA, Jeju 697-943, KOREA)
‘Shiranuhi’ mandarin hybrid([C. uhshiu × C. simensis] × C. reticulata) was produced as late-ripening citrus variety in Korea. ‘Shiranuhi’ mandarin is usually stored in cold warehouse under 5~10 degrees after harvesting. But, the cold storage of fruits has the demerits such as economic costs and malfunction of cold system. Recently, non-thermal plasma is introduced to prevent postharvest decay of fruits and vegetables. In this case, plasma was generated by the electrode plates. ‘Shiranuhi’ mandarin was stored under non-thermal plasma condition on May 18th 2014. The room temperature was 10 degrees, and the humidity was 70%. Total soluble solid and acidity were not significantly different between non-treated (NT) group and non-thermal plasma treatment (NPT) group for 50 days. Postharvest decay, however was induced by P. digitatum(green mold) and P. italicum(blue mold), and the second infection were reduced on NPT group significantly. In the decay rate, 19% was on NT group and 11% was on NPT group after 50 days. But the stem-end protrusion rot was induced on NPT group. The over-exposure of ozone gas and ionized hydrogen was the cause of symptom. So the optimum condition of non-thermal plasma has to be established depending on the kind of fruits and the scale of cold warehouse. That is, non-thermal plasma treatment prevents the postharvest decay, and the fruit quality of ‘Shiranuhi’ mandarin is not affected by non-thermal plasma during storage. Therefore non-thermal plasma treatment is considered as the convenient alternative for the fruit and fresh-cut products storage.