Timing of 1-methycyclopropene exposure in relation to ethylene application influences shelf life of Cavendish bananas
Farid Moradinezhad, Andreas Klieber, Margaret Sedgley and Amanda J. Able
Abstracts Book, 6th International Postharvest symposium, 8-12 April 2009, Antalya, Turkey. 256 pages.
2009
บทคัดย่อ
We examined the respone of shelf life and fruit quality of banana (cv. Williams) from the middle of the bunch to the application of 1-MCP and ethylene simultaneously as well as the effect of pre- and early-climacteric application of 1-MCP (multiple applications) treatment of bananas harvested from the top or bottom of bunches. Fruit were treated with ethylene at 100 µL L-1 for two consecutive days as a control or simultaneously with 1-MCP at different concentrations (30, 100 or 300 nL L-1) on the first day or second day, or treated with 1-MCP alone on the third day. To examine the effect of low concentration of 1-MCP in the pre-climacteric stage fruit were treated with 1-MCP at (0, 2, 4, 5, 6 or 10 nL L-1) for 6 h at 22 ºC and followed by ethylene at 100 µL L-1 for two consecutive days (control) or ethylene followed by early-climacteric 1-MCP application at 300 nL L-1. Shelf life increased significantly compared to the control when 1-MCP was applied coincidently with ethylene in the second day and reapplied alone in the third day or applied only in the third day. Application of 1-MCP at the lower concentrations at the pre-climactic stage in combination with reapplication of 1-MCP in the early-climacteric stage increased shelf life significantly in both fruit from the top and bottom of the bunch. Higher concentrations of applied 1-MCP in both experiments sometimes caused fruit ripening not to occur, in other treatments 1-MCP had no negative impact on shelf life and quality parameters such as firmness, discoloration index, weight loss, total soluble solids. These observation suggest that the efficacy of 1-MCP to improve shelf life and quality of bananas is reliant on not only the concentration of applied 1-MCP but also the timing of 1-MCP application in relation to ethylene application. We conclude that simultaneous application of 1-MCP is more affective than the more common method of extending banana shelf life through of 1-MCP after ethylene treatment.