Fig. 1From: Melatonin may increase disease resistance and flavonoid biosynthesis through effects on DNA methylation and gene expression in grape berriesDetermination of berry veraison (a, b) and changes in melatonin content (c) in ‘Merlot’ berries under 50 μM melatonin treatment. Berry veraison was indicated by berry coloring, increases in total soluble solids and anthocyanins and decreases in titratable acid. Values represent the means ± SD of three replicates. * Significant difference, P < 0.05; ** highly significant difference, P < 0.01Back to article page