Monoterpenes make important contributions to the aroma of grapes and wine. In this study, the monoterpene profiles and related gene expression patterns were investigated in vitis vinifera cv. Muscat Hamburg grapes grown under open-field and rain-shelter cultivation for two vintages. The results showed bound monoterpenes biosynthesis was repressed during the rainy season. There were no significant differences on the concentration of most of individual monoterpenes in grapes between rain-shelter and open-field cultivation in 2018. Compared with open-field cultivation, grapes under rain-shelter cultivation and the resulting wines had greater contents of monoterpenes in the rainy vintage (2019), in line with the higher expressions of most of the TPSs genes in rain-shelter cultivated grapes. Rain-shelter cultivation might improve tolerance to seasonal rain-induced stresses. The present study has revealed the influence of rain-shelter cultivation on monoterpene compounds in Muscat Hamburg grapes and wines thus providing a useful technique for improving the aroma quality of grapes and wines in the rainy season.

单萜类化合物为葡萄和葡萄酒的香气做出了重要贡献。在这项研究中，对葡萄中的单萜概况和相关基因表达模式进行了研究。简历。汉堡麝香葡萄在露天和避雨栽培下种植了两个年份。结果表明，在雨季，结合的单萜生物合成受到抑制。在2018年的雨棚栽培和开阔田耕之间，葡萄中大多数单个萜烯的浓度没有显着差异。与露天栽培相比，在雨棚栽培下的葡萄及其所酿制的葡萄酒中单萜的含量更高。多雨年份（2019），与大多数避雨栽培葡萄中TPSs基因的较高表达相符。避雨栽培可能会提高对季节性降雨引起的胁迫的耐受性。