Trichothecium roseum infection promotes ripening of harvested muskmelon fruits and induces the release of specific volatile compound
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Pink rot caused by Trichothecium roseum is a major postharvest disease of muskmelon fruit in the northwestern areas of China. The pathogen generally reduced quality of melons and enhanced loss. In this study, T. roseum infected muskmelon (Cucumis melo c v. ‘Jinhongbao’) fruits were used to investigate the effect of infection on respiration rate, ethylene production, basic quality parameters and volatile compounds. The results showed that T. roseum infection increased an earlier ethylene and respiration evolution of the infected fruits. Infected fruit showed an higher weight loss, but lower firmness, total soluble solid (TSS) and ratio of TSS to titratable acid (TA). The amounts of total volatile compounds, aldehydes, alcohols and esters, increased following infection. Among them, heptanal, benzeneacetaldehyde and 4-methyl-2-propyl-1-pentanol were specifically found in the infected fruits. Between the produced volatiles, heptanal and 4-methyl-2-propyl-1-pentanol showed an increase, while benzeneacetaldehyde showed a downward trend over the whole infection period. These results suggested that T. roseum infection promotes muskmelon fruit ripening and quality loss, accelerates release of esters, aldehydes, and alcohols, and produces some unique volatile compounds.
KeywordsFruit Trichothecium roseum Fungal infection Postharvest quality Volatile compounds
This study was supported by grants from the special fund for Agro-scientific Research in the Public Interest (201303075 and 2012AA101607-1).
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Conflict of interest
The authors declare that they have no conflict of interest.
Statement of human and animal rights
This article does not contain any studies with human or animal subjects performed by the any of the authors.
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