Influence of aqueous 1-methylcyclopropene concentration, immersion duration, and solution longevity on the postharvest ripening of breaker-turning tomato (Solanum lycopersicum L.) fruit

被引:53
作者
Choi, Sun Tay [1 ]
Huber, Donald J. [1 ]
机构
[1] Univ Florida, Dept Hort Sci, IFAS, Gainesville, FL 32611 USA
关键词
ethylene; firmness; lycopene; 1-methylcyclopropene; polygalacturonase; ripening; softening; tomato;
D O I
10.1016/j.postharvbio.2008.01.003
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
The influence of aqueous 1-methylcyclopropene (1-MCP) concentration, immersion duration, and solution longevity on the ripening of early ripening-stage tomato (Solanum lycopersicum L.) has been investigated. Tomato fruit at the breaker-turning stage were fully immersed in aqueous 1-MCP at 50,200,400 and 600 mu g L-1 for 1 min, quickly dried, and then stored at 20 degrees C. Ethylene production, respiration, surface color development, and rate of accumulation of lycopene and polygalacturonase (PG) activity were suppressed and/or delayed in fruit exposed to aqueous 1-MCP. Suppression of ripening was concentration dependent, with maximum inhibition in response to I min immersion occurring at concentrations of 400 and 600 mu g L-1. Climacteric ethylene peaks were delayed approximately 6, 7, and 9 d and respiration was strongly suppressed in fruit treated with aqueous 1-MCP at 200, 400, and 600 mu g L-1, respectively, compared with control fruit. Fruit firmness, lycopene content, PG activity, and surface hue of fruit treated at the three higher levels remained strongly suppressed compared with control. Skin hue values and pericarp lycopene content in response to treatment at the subthreshold 50 mu g L-1 provided evidence for differential ripening suppression in external versus internal tissues. Maximum delay of softening and surface color development in response to 50 mu g L-1 aqueous 1-MCP occurred following immersion periods of between 6 and 12 min. Factors affecting fruit penetration by aqueous 1-MCP and rnechanisms contributing to recovery from 1-MCP-induced ripening inhibition are discussed. (c) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:147 / 154
页数:8
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