【摘 要】
：
Postharvest 1-MCP can maintain fruit quality and inhibit development of superficial scald,a physiological storage disorder found in apple fruit,but the extent of the inhibition can vary by application
【机 构】
：
Department of Horticulture,Cornell University,Ithaca,NY 14853,USA;School of Chemical Engineering,Nor
【出 处】
：
2015 International Conference on Fruit Quality Biology (第二届果
论文部分内容阅读
Postharvest 1-MCP can maintain fruit quality and inhibit development of superficial scald,a physiological storage disorder found in apple fruit,but the extent of the inhibition can vary by application time.In this study,we investigated whether multiple applications of 1-MCP might improve scald control.Cortlandapples were untreated,treated on the day of harvest with the antioxidant inhibitor of scald,diphenylamine(DPA),or with 1 μL L-1 1-MCP at different intervals after harvest.Treatment times(days)were 1,4,7,1+4,4+7,1+4+7,7+14,7+28,7+42,and 7+84.Internal ethylene concentrations(IECs),flesh firmness,and accumulations of alpha-farnesene and conjugated trienols(CTols)were measured at harvest,at the time of treatment,and at intervals during air storage at 0.5 degrees C for up to 36 weeks.Results indicated that effective control of scald inCortlandwas obtained with 1-MCP treatments within the first 4 days of harvest,either alone or in combination.Scald control with delayed 1-MCP treatments resulted in poorer scald control that was comparable to that obtained with DPA.IECs and alpha-farnesene accumulation were similar in untreated and DPA treated fruit,but inhibited by 1-MCP.However,differences among 1-MCP treatments became more evident with increasing storage periods.Inhibition of IECs and alpha-farnesene accumulation was greater in fruit treated on days 1,4,1+4,4+7,1+4+7,than on day 7 alone.A second application of 1-MCP on day 14 to fruit treated on day 7 increased inhibition of IECs,alpha-farnesene and CTol accumulations,but increasing delays before the second 1-MCP treatment resulted in progressively less inhibition of these factors.The results indicate that initial 1-MCP treatments should be applied to faster ripening cultivars such asCortlandwithin a few days of harvest.
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