02477naa a2200169 a 450000100080000000500110000800800410001910000110006024500680007126000090013952019040014865300130205265300180206565300270208365300120211077301850212210789392011-08-03       2005    bl uuuu     u00u1 u    #d1 aEpagri  aPost-storage Quality of Apple Fruit Treated with AVG and 1-MCP.  c2005  a¡¥Gala¡¦, ¡¥Royal Gala¡¦ and ¡¥Imperial Gala¡¦ apple (Malus xdomestica Borkh.) from commercial orchards in Southern Brazil were sprayed with 120 g ha-1 AVG (aminoethoxyvinylglycine, ReTainTM) 4 weeks before the estimated commercial harvest date in two growing seasons. Fruit were harvested every 5 to 7 days starting 3 weeks before the estimated commercial harvest date. Fruit treated and untreated with AVG, harvested at end of optimum commercial maturity window for long term storage (~17 lb) were treated with 1 ?ÝL L-1 1-MCP (1-methylcyclopropene, SmartFreshTM) one day after harvest, and stored for 3, 5 or 7 months in air (0.5 oC) or in controlled atmosphere (CA, 1.5 kPa O2 + 2.5 kPa CO2 at 0.5 oC). Fruit maturity and quality were determined at harvest and after cold storage plus 7 days at 20 ¢XC. Treatment with AVG delayed fruit ripening on the trees as indicated by internal ethylene concentration, fruit firmness, starch index and peel background color. AVG treated fruit reached creamy-white peel background color and firmness of approximately 17 lb 8 to 18 days later than untreated fruit, depending on cultivar and season. In general, pre-harvest treatment with AVG had no effect on rate of fruit softening and incidence of senescent internal browning after storage for fruit harvested with firmness of approximately 17 lb, regardless of storage conditions and post-harvest treatment with 1-MCP. The highest fruit firmness and the lowest incidence of senescent internal browning were observed in CA stored fruit treated with 1-MCP, regardless of pre-harvest treatment with AVG. Results indicate that pre-harvest treatment with AVG normally has no impact on maintenance of fruit quality after cold storage. Possible differences in fruit quality after cold storage between AVG- and non-AVG -treated fruit are normally relative to differences in fruit maturity at harvest.  aethylene  afruit quality  aMalus xdomestica Borkh  astorage  tIn: INTERNATIONAL SYMPOSIUM ON PLANT BIOREGULATORS IN FRUIT PRODUCTION, 10., 2005, Saltillo. Agenda and Abstracts... Saltillo, Mexico : A.D. Webster, H. Ramirez , 2005. p. 108-108.