AI Article Synopsis
- C6 volatiles are produced via the LOX-HPL pathway, significantly influencing the aroma of grape berries.
- The study analyzed various table grape cultivars throughout their development, focusing on the presence and gene expression related to C6 volatiles.
- Key findings highlighted that different cultivars exhibited unique profiles of C6 volatiles, with specific cultivars showcasing the highest levels of certain compounds, and a correlation was found between gene expression in the LOX-HPL pathway and the accumulation of these volatiles.
Article Abstract
C6 volatiles are synthesized through lipoxygenase-hydroperoxide lyase (LOX-HPL) pathway and these volatiles play important roles in the aromatic quality of grape berries. This study investigated the evolution of both C6 volatiles and the key genes in the LOX-HPL pathway in different table grape cultivars during the berry development period, and further assessed the correlation between the accumulation of C6 volatiles and the expression of these genes in these cultivars. Results showed that hexanal, ()-2-hexenal, ()-2-hexen-1-ol and ()-3-hexen-1-ol were found to be the dominant C6 volatiles in these ripened grape cultivars under two consecutive vintages, and their flavor notes were incorporated in the overall aroma of these cultivars. The cultivar "Xiangfei" showed the most abundant level of C6 aldehydes and C6 acid, whereas the cultivar "Tamina" and "Moldova" possessed the highest C6 alcohol content. The "Muscat of Alexandria" cultivar was found to contain the highest level of C6 esters. C6 volatiles were grouped into three evolutionary patterns in these cultivars during berry development, and their evolution was consistent with the evolution of the LOX-HPL pathway genes' expression. Pearson's correlation analysis indicated that the LOX-HPL-pathway-related genes were correlated to the accumulation of C6 volatiles in these cultivars, and appeared to be an important gene that regulated the synthesis of all C6 volatiles.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5751306 | PMC |
| http://dx.doi.org/10.3390/ijms18122705 | DOI Listing |
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