Distribution of 3-Isobutyl-2-methoxypyrazine across Rachis Components of Vitis vinifera Shiraz and Cabernet Sauvignon

Figure 2

Estimated marginal means of IBMP (ng/kg of rachis ± SE) in the peduncle, top rachis, bottom rachis, and pedicel from Shiraz rachis sampled during the 2019/20 and 2021/22 vintages from the Barossa Valley, considering the interaction effect between rootstock (own roots and Ramsey) and berry maturity (flowering ( green), veraison ( red), and harvest ( purple)). Bars sharing the same letter within a component are not significantly different (linear mixed model, α = 0.05, Bonferroni-adjusted). Note. Pedicel material was not sampled at flowering. Concentrations (ng/kg rachis) were calculated from ng/kg of component values (Figure S3 of the Supplementary Material) by considering component contribution (% w/w) to total rachis weight (Figure S2 of the Supplementary Material). Note the different y-axis scale for pedicel.