Effect of varying concentrations of melatonin on anthocyanin and sugar metabolism in grapes (Vitis labruscana L.)

Journal article

Authors/Editors

VARIT SRILAONG

Strategic Research Themes

Postharvest (Sustainable agriculture)

Publication Details

Author list: Wang, Shanshan; Song, Junjie; Wang, Liwei; Tomiyama, Hiroyuki; Saito, Takanori; Ohkawa, Katsuya; Ohara, Hitoshi; Yuhui, Zhao; Srilaong, Varit; Kondo, Satoru;

Publication year: 2023

Volume number: 57

Issue number: 1

Start page: 107

End page: 116

Number of pages: 10

ISSN: 24681458

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85152567136&doi=10.34044%2fj.anres.2023.57.1.11&partnerID=40&md5=785bff8d6ae4ace66e46122f597a4b68

Languages: English-Great Britain (EN-GB)

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Abstract

Importance of the work: The effects of melatonin on fruit maturation are still unclear and these effects may vary according to treatment concentrations. Objectives: To investigate the effects of melatonin treatment on anthocyanin, sugar, abscisic acid (ABA) and indole 3-acetic acid (IAA) concentrations and their related genes. Materials & Methods: In the first and second groups, clusters of ‘Kyoho’ grape vines were randomly immersed in 100 μM and 1,000 μM melatonin, respectively, with the surfactant Approach BI at 30 d after full bloom. In the third group, clusters of the untreated control were treated with Approach BI only. Results: Treatment with 100 μM melatonin promoted anthocyanin accumulation and expression of the VlMYBA1-2 and VvUF3GT genes. In addition, it increased the concentrations of sugars, such as fructose, glucose and sucrose, and upregulated the expression of sugar biosynthesis-related genes (VvSUT11, VvSUS4, VvAI and VvHT1). Melatonin treatment increased ABA concentrations with the upregulation of VvNCED1 at 24 d after treatment. IAA concentrations and the expression of VvGH3-1 decreased in the 100 μM melatonin-treated berries. In contrast, the 1,000 μM melatonin treatment did not influence the anthocyanin or sugar concentrations. Main finding: Melwatonin may affect anthocyanin and sugar metabolism through ABA and IAA biosynthesis. Treatment with 100 µM melatonin was most effective at increasing the anthocyanin and sugar concentrations in grapes. Copyright © 2023.

Keywords

Coloration, Indole acetic acid, plant hormone, VlMYB