Journal
METABOLOMICS
Volume 8, Issue 4, Pages 742-753Publisher
SPRINGER
DOI: 10.1007/s11306-011-0373-5
Keywords
Metabolomics; Partial least squares analysis (PLS); GC-MS; Sorbitol; GABA; Amino acids; Volatiles; Phenolic compounds; Flesh browning
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Funding
- Federal Formula Funds [NE1036]
- New York Apple Research and Development Program
- AgroFresh, Inc.
- Department of Horticulture assistantship
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'Empire' apple fruit are more susceptible to flesh browning at 3.3A degrees C if treated with 1-methylcyclopropene (1-MCP), an inhibitor of ethylene perception. To better understand the metabolic changes associated with this browning, untargeted metabolic profiling with partial least squares analysis has been used to visualize changes in metabolic profile during hypoxic controlled atmosphere (CA) storage, ethylene insensitivity, and disorder development. Overall, most carbohydrates and organic acids were not appreciably affected, but the levels of amino acids and volatile metabolites were significantly affected, by 1-MCP treatment. Sorbitol and levels of some amino acids were elevated towards the end of storage in 1-MCP treated fruit. CA storage reduced the levels of many volatile components and 1-MCP reduced these levels further. Additionally multiple metabolites were associated with the development of flesh browning symptoms. Unlike other volatile compounds, methanol levels gradually increased with storage duration, regardless of 1-MCP treatment, while 1-MCP decreased ethanol production. Results reveal metabolic changes during storage that may be associated with development of flesh browning symptoms.
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