College of Enology, Northwest A&F University, Yangling, Shaanxi 712100, China.
College of Enology, Northwest A&F University, Yangling, Shaanxi 712100, China.
Food Chem. 2018 Apr 15;245:667-675. doi: 10.1016/j.foodchem.2017.10.018. Epub 2017 Oct 7.
The effect of regulated deficit irrigation (RDI) on fatty acids and their derived volatiles in 'Cabernet Sauvignon' grapes and wines was investigated during two growing seasons in the east foot of Mt. Helan, the semi-arid area. The vines received water with 60% (RDI-1), 70% (RDI-2), 80% (RDI-3), 100% (CK, traditional drip irrigation) of their estimated evapotranspiration (ETc) respectively. RDI treatments resulted in lower yield, berry weight and titratable acidity with higher total soluble solids. RDI-1 increased the content of unsaturated fatty acids in berries and decreased the level of alcohols and esters volatiles in wines. RDI-2 and RDI-3 enhanced 1-hexanol and esters in wines in comparison with CK. The concentrations of C aroma compounds were closely correlated with unsaturated fatty acids (p < .05), especially linolenic acid and linoleic acid. The present results provided direct evidence and detailed data to explain the effect of RDI on grapes and wines composition regarding fatty acids and their derived volatiles.
在半干旱的贺兰山东麓，进行了两个生长季的研究，以考察亏缺灌溉（RDI）对‘赤霞珠’葡萄及葡萄酒中脂肪酸及其衍生挥发性物质的影响。葡萄藤分别接受了其估计蒸散量（ETc）的 60%（RDI-1）、70%（RDI-2）、80%（RDI-3）和 100%（CK，传统滴灌）的水分处理。RDI 处理导致产量、浆果重量和可滴定酸度降低，而总可溶性固形物增加。RDI-1 增加了浆果中不饱和脂肪酸的含量，降低了葡萄酒中醇类和酯类挥发性物质的水平。与 CK 相比，RDI-2 和 RDI-3 提高了葡萄酒中的 1-己醇和酯类物质。C 类香气化合物的浓度与不饱和脂肪酸（p < .05）密切相关，尤其是亚麻酸和亚油酸。本研究结果为亏缺灌溉对葡萄和葡萄酒中脂肪酸及其衍生挥发性物质组成的影响提供了直接证据和详细数据。
