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Differential Expression of VvLOXA Diversifies C6 Volatile Profiles in Some Vitis vinifera Table Grape Cultivars

文献类型： 外文期刊

作者： Qian, Xu 1 ; Sun, Lei 2 ; Xu, Xiao-Qing 1 ; Zhu, Bao-Qing 1 ; Xu, Hai-Ying 2 ;

作者机构： 1.Beijing Forest Univ, Dept Food Sci & Engn, Coll Biol Sci & Technol, Beijing 100083, Peoples R China

2.Beijing Acad Forestry & Pomol Sci, Beijing 100093, Peoples R China

关键词： Vitis vinifera grapes; C6 volatiles; gas chromatography-mass spectrometry (GC-MS); VvLOXA expression; lipoxygenase-hydroperoxide lyase (LOX-HPL) pathway; multivariate analysis

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）

ISSN： 1422-0067

年卷期： 2017 年 18 卷 12 期

页码：

收录情况： SCI

摘要： 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, (E)-2-hexenal, (E)-2-hexen-1-ol and (Z)-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 VvLOXA appeared to be an important gene that regulated the synthesis of all C6 volatiles.

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