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摘要
Fatty acid derived C6 volatiles, including cis-3-hexenal, hexanal, trans-2-hexenal, and cis-3-hexenol, are important contributors to tomato aroma. Methyl salicylate (MeSA), a critical mobile signal, functions in tomato ripening as well as (a)biotic stress; however, information is limited on its impact on the development of C6 volatiles. For this, breaker FL 47 tomato fruits fumigated with 0.05 mM deionized (DI) water (control) or MeSA for 24 hr were stored at 20 degrees C until the red stage. Results showed that the biosynthesis of hexanol and cis-3-hexenol were substantially suppressed by MeSA fumigation, which was associated with the downregulated expression level of alcohol dehydrogenase2 (ADH2) and enzyme activities of lipoxygenase (LOX) and ADH in their biopathway. Although the abundance of cis-3-hexenol was reduced by MeSA fumigation, electronic nose (e-nose) could not discriminate the difference in aroma profile between two treatments. Practical applicationsFatty acid derived C6 volatiles are important contributors to tomato aroma, while methyl salicylate (MeSA) functions in tomato ripening as well as (a)biotic stress. This study was conducted to study the residual impact of MeSA fumigation at the breaker stage on C6 volatile biopathway in red tomato fruit. Results showed that MeSA fumigation reduced the production of C6 alcohols; however, e-nose could not discriminate the difference in aroma profile between two treatments. In combination with the result of firmness, MeSA fumigation at the breaker stage might be employed as a potential method for producers to extend the logistic time of tomato fruit with less impact on its aroma profile.
