Key stages in grapevine flower and berry development and diagrammatic representation of genes which were highly expressed in fertilized grapevines compared to the control in various stages. Upward pointing arrows: genes that were highly expressed compared to the control; blue ovals, N assimilation genes; green ovals, P uptake genes; red ovals, K uptake genes. N, P, and K: the nutrient types needed by grapevine. FE-1 to FE-10: fertilization times as shown in Table 1. Grapevine samples were derived from the Summer Black cultivar.