02241naa a2200217 a 450000100080000000500110000800800410001910000180006024500500007826000090012830000130013749000060015050000180015652016020017465000140177665300140179070000190180470000180182370000190184177301630186018676392010-11-22       2010    bl uuuu     u00u1 u    #d1 aSANTOS, L. O.  aDegreening of ‘satsuma okitsu’ tangerine.  c2010  aP.143. 2  v2  aPDF. S02.341.  aFruit of ‘Satsuma Okitsu’ tangerine have similar aspects to ‘Ponkan’, with matura-tion period starting in January, and being able to supply the Brazilian market dur-ing off-season. Fruits of this cultivar have to be harvested with green peel, which is not well accepted by the market. Having this obstacle, this study aimed to evalu-ate the degreening of ‘Satsuma Okitsu’ tangerine using ethephon (2-chloroethyl phosphonic acid). The fruits were harvested with the sten end and when it reached the relation soluble solids / acidity around 7 - 19. They were immediately trans-ported to the laboratory where it were selected to standardize them by color, size and absence of injuries. After selection, the fruits were treated with the Imazalil fungicide (200 mL×100 L-1) for two minutes and after 24 hours these fruits were dipped in different concentrations of ethephon as Ethrel 240 (control, 250 ppm, 500 ppm and 1000 ppm ). The fruits were analyzed every 3 days during 9 days of storage, by appearance, weight loss, hind color, soluble solids, acidity and ascorbic acid content. The experiment was conducted in a completely randomized design. The results showed that the different doses reduced significantly ascorbic acid content, due to the effect of exogenous ethylene which accelerate the aging process of these fruits. It was observed that the 500 ppm Ethrel treatment provided the best flavedo or hind degreening which made these fruits turn orange with greater intensity. The fruits treated with 500 ppm had smaller weight loss, and presented 6 days of shelf- life at 18 ºC.  aTangerina  aTangerine1 aDURIGAN, J. F.1 aSTUCHI, E. S.1 aMARTINS, R. N.  tIn: INTERNATIONAL HORTICULTURAL CONGRESS, 28., 2010, Lisboa. Science and horticulture for people: programme & book of abstracts. Lisboa: ISHS, 2010. 1 CD-ROM.