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. 2020 May 8;11:483. doi: 10.3389/fpls.2020.00483

FIGURE 1.

FIGURE 1

The concentrations of norisoprenoids and the expression levels of VvCCDs in grape berries from two regions in 2 years. (A) The analysis of k-means clustering for 2013 and 2016 vintages. (B) The expression of VvCCDs in “Cabernet Sauvignon” grape berries from two regions in 2 years. The data are expressed as means ± SD of three replications. (C) Heatmap of Pearson’s correlation results. The correlation is assessed based on the normalized concentration of individual norisoprenoid volatile and the normalized expression level of VvCCDs during the development period. The data on the heatmap are correlation coefficients. ∗∗Significant correlation at P < 0.01 (two-sided test). ∗Significant correlation at P < 0.05 (two-sided test). The red block indicates positive correlation, and the blue block indicates negative correlation. The clusters were corresponding to the results of the k-means analysis. TDN: 1,1,5–trimethyl–1,2–dihydronaphthalene; TCH: 2,2,6-trimethylcyclohexanone; TPB: (E)-1-(2,3,6-trimethylphenyl) buta-1,3-diene.