Effect of Skin Maceration Treatment on Aroma Profiles of Kiwi Wines Elaborated with Actinidia deliciosa "Xuxiang" and A. chinensis "Hort16A".

Abstract

Background: Kiwi has become an important and promising fruit to ferment kiwi wine in recent years in China. Objective: The objective of this study was to evaluate the effect of skin maceration treatment on aroma profiles of kiwi wine elaborated with two representative kiwi varieties (Actinidia deliciosa "Xuxiang" and A. chinensis "Hort16A"). Methods: Aroma profiles were characterized using solid-phase microextraction GC-MS method. Principal component analysis was used to separate and group the wines as well as for identifying the aroma components that best differentiate the wines. Results: Esters and alcohols were the two most abundant compounds in kiwi wine. Skin maceration treatment gave rise to a positive effect of aroma profiles, resulting in a significant increase of terpenes. A total of 11 volatile compounds were found at concentrations higher than their odor threshold in kiwi wine samples. Conclusions: The study could play a role in laying a foundation for the development of the kiwi fruit wine industry. Highlights: Different aroma profiles were presented because of variety differences. Skin maceration treatment gave rise to a positive effect of aroma profiles, which resulted in a significant increase of terpenes.