Content of phenol and stilbene compounds and gene expression related to fruit development during ripening in Ampelopsis

Abstract Grapes are used worldwide and rich in polyphenols, such as anthocyanins stilbene compounds. Wild grapes contain abundant compounds, which beneficial to humans. This study examined the polyphenol content gene expression involved skin coloration ripening stage of Ampelopsis spp. Accession compared ‘VC-1’ ( Vitis coignetiae ) ‘Super Hamburg’ V. labruscana ). The flavonoid was generally higher fruit than other grape lines, highest among accessions found ‘YG10075’ at 9.67 mg quercetin equivalent (QE) per g fresh weight. anthocyanin 1.2% (w/w), accession with ‘YG10062’ 0.27%. resveratrol 70.4 μg/g, 48.5 μg/g. Expression levels genes color development increased during maturation Hamburg’, but decreased ‘YG10042’, ‘YG10075’, ‘YG10062’. related compound synthesis, coloration, reactive oxygen species (ROS) high leaves ‘YG10045’, young berries ripe ‘YG-Songni4’. showed different patterns depending on , organ, stage. Our results indicate that ‘YG-Songni4’ is most valuable synthesis stilbenic compounds throughout all organs. could be a useful genetic resource breeding programs.