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Updated: May 31, 2025

Herbivore-induced Blueberry Volatiles and Intra-plant Signaling
Published on: December 18, 2011
Melatonin promoted terpene accumulation of blueberries during postharvest partial dehydration
Qin Yang1, Hai-Jun Bi2, Qi Zhang1
1Key Laboratory of Jianghuai Agricultural Product Fine Processing and Resource Utilization of Ministry of Agriculture and Rural Affairs, Anhui Engineering Research Center for High Value Utilization of Characteristic Agricultural Products, College of Food and Nutrition, Anhui Agricultural University, Hefei 230036, China.
Abstract:
Although postharvest partial dehydration has been applied to enhance blueberry wine flavor by increasing terpene level, berry decay remains a concern. Melatonin is known to improve fruit resistance during storage, but its role in terpene accumulation in blueberries during postharvest dehydration remains unclear. This study identified aroma-active terpenes of blueberry wines applying aroma extract dilution analysis and revealed the key genes linked to the increased terpenes in dehydrated blueberries. Further investigations studied the effects of melatonin on key terpene accumulation in dehydrated blueberries. Results showed that melatonin (250 μmol/L) reduced berry decay and increased total terpene content by five folds compared to undehydrated blueberries. Besides, melatonin could interact with ethylene, mitigating the inhibitory effects of 1-methylcyclopropene (1 μL/L) on terpene accumulation. The increased terpene by melatonin could be associated with upregulated VcDXS, VcHDR and VcTPS genes, particularly VcTPS was characterized as a monoterpene synthase, mainly producing linalool.
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