Figure 6From: Timing of ripening initiation in grape berries and its relationship to seed content and pericarp auxin levels Hormone level of abscisic acid (ABA) (A), and the expression levels of ABA biosynthesis gene, NCED4 (B) and ABA-responsive gene, MYBa1 (C) in the pericarp of low and high seed weight-to-berry weight (SB) groups. ABA levels were quantified by LC-MS/MS using four replicates. Gene expressions were measured by qRT-PCR and expression levels are relative to those of low-SB berries at 2-wk PV (n = 5). Error bars indicate ± SEM. Prevéraison stages were two- and one-week before véraison (2-wk PV and 1-wk PV). Gene expressions were also measured at mid-véraison (MV) cluster stage. Significant differences between low- and high-SB berries at each cluster stage are indicated by asterisks (Student’s t-test, p < 0.05). Significant differences of each SB group between the ripening stages are denoted by different letters (lower and upper case letters are used for low- and high-SB berries, respectively (Tukey’s HSD, p < 0.05)).Back to article page