Apple fruit recovery from anoxia under controlled atmosphere storage

The inhibitor of ethylene binding, 1-methylcyclopropene (1-MCP) has been applied to `Gala', `Cortland', `McIntosh', `Empire', `Delicious', `Jonagold', and `Law Rome' apples under air and/or controlled atmosphere (CA) storage conditions. 1-MCP gas concentrations ranged from 0 to 2 mL·L–1. Effects of 1-MCP were greater in CA than air storage. A dose response of internal ethylene concentrations and flesh firmness to 1-MCP was found in cultivars such as `McIntosh' and `Law Rome', whereas in others, such as `Delicious' and `Empire', ripening was generally prevented by all 1-MCP concentrations. We have further investigated the effects of 1-MCP on `McIntosh' by increasing rates of the chemical to 50 mL·L–1, and confirming that fruit of this cultivar respond poorly if fruit have entered the climacteric prior to 1-MCP application. Efficacy of 1-MCP is affected by cultivar and storage conditions, and that successful commercial utilization of the chemical will require understanding of these relationships.

Download Full-text

Impact of 1-methylcyclopropene and controlled atmosphere storage on polyamine and 4-aminobutyrate levels in â€œEmpireâ€ apple fruit

Frontiers in Plant Science ◽

10.3389/fpls.2014.00144 ◽

2014 ◽

Vol 5 ◽

Cited By ~ 18

Author(s):

Kristen L. Deyman ◽

Carolyne J. Brikis ◽

Gale G. Bozzo ◽

Barry J. Shelp

Keyword(s):

Apple Fruit ◽

Controlled Atmosphere ◽

Controlled Atmosphere Storage ◽

Atmosphere Storage

Download Full-text

Penicillium expansum Invades Apples Through Stems during Controlled Atmosphere Storage

Plant Health Progress ◽

10.1094/php-2006-1213-01-rs ◽

2006 ◽

Vol 7 (1) ◽

pp. 1 ◽

Cited By ~ 4

Author(s):

David A. Rosenberger ◽

Catherine A. Engle ◽

Frederick W. Meyer ◽

Christopher B. Watkins

Keyword(s):

Carbon Dioxide ◽

Apple Fruit ◽

Spore Suspension ◽

Penicillium Expansum ◽

Controlled Atmosphere ◽

Controlled Atmosphere Storage ◽

Cold Air ◽

Apple Leaves ◽

Atmosphere Storage ◽

And Storage

Empire apples were collected from six orchards in 1997 and 1998 and were then subjected to various inoculation and storage regimes to determine how non-wounded fruit become infected with Penicillium expansum and to determine if decay susceptibility varies with orchard source. Replicated samples of fruit were inoculated within 24 h of harvest either by placing a 10 μl droplet containing 500 conidia of P. expansum onto the end of the apple stems or by placing 500 μl containing 10,000 conidia into the stem basin. Fruit were stored for 7 to 9 months either in cold air (1.1°C) or in controlled-atmosphere (CA) storage (1.1°C, 1.6% oxygen and 2.2% carbon dioxide), and were then evaluated for decay. Twenty-seven to 47% of fruit that had been inoculated by placing spores on the ends of stems developed decay during CA storage whereas less than 1% of similarly inoculated fruit decayed during cold-air storage. Placing spore suspension into the stem basins also resulted in less than 1% decay. Orchard-to-orchard variation in incidence of decay that developed was positively correlated with boron concentrations in both apple leaves (R2 = 0.66) and apple fruit (R2 = 0.62). This is the first report of P. expansum causing commercial losses in apples due to invasion through stems and also the first Accepted for publication 28 September 2006. Published 13 December 2006.

Download Full-text