Effect of UV-C irradiation on chlorophyll degradation and quality change in Chinese kale (Brassica oleracea var. alboglabra)
C. Burana and V. Srilaong
Book of Abstracts, Southeast Asia Symposium Quality and Safety of Fresh and Fresh Cut Produce Greater Mekong Subregion Conference on Postharvest Quality Management in Chains, August 3-5, 2009, Radisson Hotel, Bangkok, Thailand.
2009
บทคัดย่อ
Chinese kale is widely consume in Thailand due to it contains a lot of nutrition. However, it has a short storage life especially at room temperature due to yellowing of the leaf. In this study, UV-C irradiation at 1.8, 3.6, 5.4 and 7.2 kJ m-2 was introduced to observe the quality of Chinese kale (Brassica oleracea var. alboglabra)duringstorage at 20°C. The irradiation dose of 3.6 and 5.4 kJ m-2 delayed chlorophyll degradation and maintained the highest total chlorophyll, chlorophyll a and chlorophyll b contents. It also delayed the reduction of hue angle and retarded the activity of chlorophyll degrading enzymes. Moreover, UV-C irradiation reduced the ethylene production rate which demonstrated by decreasing of ACC oxidase activity. Furthermore, weight loss and respiration rate were also suppressed by UV-C treatment. The results suggest that UV-C irradiation could be a useful non-chemical treatment to delay chlorophyll degradation and maintain the quality in Chinese kale.