Flowers at the full bloom stage were dipped into water (blank), 50 mg∙L-1 GA3 (gibberellic acid) or 3 mg∙L-1 CPPU. This was followed by a second application two weeks later onto young berries. Using integrated transcriptomic and proteomic analysis, differentially expressed transcripts and proteins associated with growth regulator treatment were identified including those for flavonoid biosynthesis that contribute to the changes in sensory astringency levels.