期刊
FRONTIERS IN PLANT SCIENCE
卷 13, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fpls.2022.1028735
关键词
Metabolomics; cucumber; fruit flavor; volatile organic compounds; hydroperoxide lyase (HPL) and lipoxygenase (LOX) metabolisms
资金
- Konkuk University research support program and RDA (Rural Development Administration, Republic of Korea) Cooperative Research Program for National Agricultural Genome Program [PJ01343202]
The differences in VOC and primary metabolite composition were investigated among 20 representative cucumber lines. The Korean breeding line showed unique VOC composition in the fruit peel compared to the other groups, with lower levels of the main cucumber flavor components.
Volatile organic compounds (VOCs) are one of the main fruit-quality determinants in cucumber. Here, we investigated the differences in the VOC and primary metabolite composition among 20 representative cucumber lines. Results of non-targeted metabolomics revealed that the cucumber breeding line of the Korean group showed a unique VOC composition in the fruit peel compared to the other groups. Fruit-flesh VOCs significantly differed among Korean, European, and Thai fruits. The main cucumber flavor components, 2-hexenal, hexanal, 6-nonenal, 2,4-nonadienal, and 2,6-nonadienal, were lower in the Korean cucumber lines than in the others. Conversely, linoleic acid derivatives and alpha-linolenic acid, which are precursors of these VOCs, were abundant in Korean cucumber line. This suggests that the metabolism related to the characteristic flavor of cucumber are downregulated in Korean cucumber line. This study provides novel insights into the fruit flavor-associated metabolome in various cucumber lines.
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