1-MCP suppresses anaerobic metabolism of apples stored under DCA-RQ 1.5 and has no effect on flesh firmness

The aim of the present work was to assess the effect of 1-methylcyclopropene treatment on ?Galaxy?, ?Fuji? and ?Pink Lady? apples harvested at?two maturity stages?(ripe and overripe) and stored under a new type of?dynamic controlled atmosphere based on respiratory quotient?(DCA-RQ1.5) and its effect on the anaerobic metabolism products formation (compounds related to off-flavours) and quality keeping after 9 months of storage plus 7 days of shelf life at 20?C.? The 1-methylcyclopropene (1-MCP) application suppressed the anaerobic metabolism products formation of the three apple cultivars and two maturity stages studied after 9 months of storage in DCA-RQ 1.5 plus 7 days of shelf life at 20?C.? Additionally, the anaerobic metabolism had a distinct behavior among maturity stages and apple cultivars. 1-MCP application also resulted in lower ACC oxidase enzyme activity and ethylene production.? Thus, 1-MCP become an important technique to suppress the anaerobic metabolism risk of apples stored under DCA-RQ 1.5. 1-MCP treatment not result in higher flesh firmness maintenance after storage in DCA-RQ 1.5. Figure -?Oxygen partial pressure variation (mean of the two maturity stages) according to fruit metabolism to maintain RQ 1.5 and the calculated RQ level variation in ?Galaxy?, ?Fuji? and ?Pink Lady?? during 9 months of storage in DCA-RQ? Sources1-methylcyclopropene suppresses anaerobic metabolism in apples stored under dynamic controlled atmosphere monitored by respiratory quotientFabio Rodrigo Thewes, Auri Brackmann, Rogerio de Oliveira Anese, Vagner Ludwig, Erani Eliseu Schultz, Magno Roberto Pasquetti Berghettia Scientia Horticulturae, Volume 227, 3 January 2018, Pages 288-295? Science direct?(complete article, link)? ?