This work was developed at the Fruit and Vegetable laboratory in the Agro-Industrial Department of the Agriculture College - UNESP - Botucatu campus, having as a main objective the characterization of gamma radiation in nectarine cv. Sunred post harvest storage. The fruits were picked out at the beginning of the maturation stage, selected, cleaned, pre cooled (4ºC for 12 hours) and then submitted to different gama radiation doses, constituting the treatments: 1 - 0,0 kGy, 2 - 0,2 kGy, 3 - 0,4 kGy, 4 - 0,6 kGy, 5 - 0,8 kGy. They were then storaged in a cold chamber at 0ºC and 90 - 95% of RH during 28 days. The analysis were performed each seven days determining fruits visual aspect, fresh mass loss, pulp firmness, titratable acidity (TA), total soluble solids (TSS) and the ratio (TSS/TA). After 28 days storage it was verified that the fruits submitted to 0,4 kGy dose presented the best visual aspect, lesser loss of fresh mass and higher pulp firmness. However, it was not found meaningful variation in the contents of titratable acidity, total soluble solids and the values in the ratio.
Cobalt 60; Sunred cv. nectarine; ionized irradiation
