Articles

1-METHYLCYCLOPROPENE (1-MCP) INCREASES CO2 INJURY IN APPLES

Article number
600_37
Pages
277 – 280
Language
English
Abstract
The objective of this research was to determine the nature and extent of CO2 injury in apples treated with 1-methylcyclopropene (1-MCP) and stored in controlled atmosphere (CA). ‘McIntosh’ apples were treated immediately after harvest with 0, 60, 300, or 600 nL·L-1 of 1-MCP for 18 to 24 hours at ~20oC, and then placed in CA (3% O2 + 2.5% CCO2 for the first 30 days followed by 3% O2 + 4.5% CO2 thereafter) for 70 and 140 days at 3oC. ‘Empire’ apples with or without ReTainTM application (200 mL·L-1, 4 weeks prior to harvest) were treated similarly with 1-MCP immediately after harvest and placed in CA (2.5% O2 + 2.0% CO2) for 120 and 240 days at 2oC. CO2 injury was promoted in ‘McIntosh’ by 1-MCP treatment, with up to 39% of the treated apples having external symptoms compared to zero incidence in the non-treated fruit. ‘Empire’ apples treated with 1-MCP also exhibited greater CO2 injury than those not treated, and the application of ReTainTM further promoted CO2 injury.

Publication
Authors
J.R. DeEll, D.P. Murr, L. Wiley, M.D. Porteous
Keywords
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