Despite their low concentrations, secondary metabolites are essential to the organoleptic quality of grapevine fruit. Anthocyanins of the fruit skin cells are the principal components of the pigmentation of the red grape. Glycosylated aroma precursors (GAPs), i.e. alcohols, C₁₃-norisoprenoids, phenols and terpenes determine the aroma potential of the juice and the resulting wine. The regulation of the sink/source (S/S) balance is considered as a one of the more powerful tools to adapt grape composition to technological objectives. In this study, we have manipulated the S/S of Vitis vinifera varieties and quantified the changes on the accumulation of secondary metabolites at the arrest of phloem unloading in the grape. The results demonstrated that the manipulation of the S/S doesn’t de-correlate the accumulation of secondary versus primary metabolites. Decreasing S/S drastically limited the accumulation of either primary metabolites (till -70 %), anthocyanins (till -70 %) and GAPs (till -81 %) per plant, with a huge production shortfall of molecules of interest per cultivated area unit.

尽管它们的浓度较低，但次生代谢产物对于葡萄果实的感官品质至关重要。水果皮细胞的花色苷是红葡萄色素沉着的主要成分。糖基化的香气前体（GAP），即醇，C _13-去甲肾上腺素，酚和萜烯决定了果汁和所得葡萄酒的香气潜力。水槽/源（S / S）平衡的调节被认为是使葡萄成分适应技术目标的更强大工具之一。在这项研究中，我们操纵了葡萄（Vitis vinifera）的S / S并量化了在韧皮部卸载后葡萄中次生代谢产物积累的变化。结果表明，S / S的操作不会使次要代谢物与主要代谢物的积累不相关。S / S的降低极大地限制了每株植物的主要代谢物（至-70％），花色苷（至-70％）和GAP（至-81％）的积累，每个耕地单元的目标分子产量严重不足。