Effect of high-dose 290 nm UV-B on resveratrol content in grape skins. Issue 4 (29th January 2022)

• Record Type: Journal Article
• Authors: Tsurumoto, Tomohiro; Fujikawa, Yasuo; Onoda, Yushi; Kamimori, Masahiro; Hiramatsu, Kazuya; Tanimoto, Hideo; Ohta, Daisaku; Okazawa, Atsushi
• Is Part Of: Bioscience, biotechnology, and biochemistry. Volume 86:Issue 4(2022)
• Page Start: 502
• Page End: 508
• Publication Date: 2022-01-29
• Subjects: grape -- high-dose UV-B -- LED -- resveratrol; Biotechnology -- Periodicals; Biochemistry -- Periodicals; 660.6
• DOI: 10.1093/bbb/zbac014
• Languages: English
• ISSNs: 0916-8451

Abstract

ABSTRACT: UV-C irradiation increases resveratrol content in grape skins, but it reaches a maximum at a certain UV-C dose. In contrast, UV-B has a weak resveratrol-enhancing effect at low doses, but it has not been investigated at high doses. In this study, we investigated the effect of high-dose UV-B on resveratrol contents in grape skins. Irradiation of Muscat Bailey A with 290 nm UV-B LED at 22 500 and 225 000 µmol m −2 increased the resveratrol contents in the grape skins by 2.1- and 9.0-fold, respectively, without significant increases in other phenolic compounds. The effect was also confirmed for 2 other cultivars: Shine Muscat and Delaware. Transcriptome analysis of the grape skins of Muscat Bailey A immediately after irradiation with UV-B at 225 000 µmol m −2 showed that genes related to biotic and abiotic stresses were upregulated. Hence, it was suggested that high-dose UV-B irradiation induces a stress response and specifically activates resveratrol biosynthesis. Graphical Abstract: