Brassinosteroids Modify Yield, Quality, and Antioxidant Components in Grapes (Vitis vinifera cv. Alphonse Lavallée)


Babalık Z. , DEMİRCİ T. , Aşcı Ö. A. , Baydar N. G.

Journal of Plant Growth Regulation, vol.39, no.1, pp.147-156, 2020 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 39 Issue: 1
  • Publication Date: 2020
  • Doi Number: 10.1007/s00344-019-09970-5
  • Title of Journal : Journal of Plant Growth Regulation
  • Page Numbers: pp.147-156
  • Keywords: Grape, Brassinosteroid, Antioxidant compounds, Yield, Quality, ASCORBIC-ACID, SECONDARY METABOLISM, 24-EPIBRASSINOLIDE, RESVERATROL, TOLERANCE, STRESS, GROWTH, TOMATO, IMPACT, SEEDS

Abstract

Brassinosteroids (BRs) are a class of polyhydroxysteroids that have been recognized as a "sixth class of plant hormones." Exogenous application of BRs affects a broad spectrum of physiological responses, secondary metabolite accumulation, and resistance against stress factors in plants. In this study, the effects of pre-harvest 24-epibrassinolide (24-eBL) applications on the accumulation of antioxidant compound, yield, and quality properties of Alphonse Lavallee grape cultivar were examined. 24-eBL was applied to vines with 13 combinations including different application times and concentrations of 24-eBL (0.2, 0.4, 0.6, and 0.8 mg L-1) and control. It was found that 24-eBL increased yield, quality, and antioxidant compounds in grapes when it was applied at appropriate concentration and application time. The concentration 0.2 mg L-1 of 24-eBL applied to vines at three times (7 days after berry set + veraison + 30 days after veraison) was the most suitable application providing the highest yield and some quality properties such as cluster weight, berry weight, and specific gravity. Concentrations 0.6 and 0.8 mg L-1 of 24-eBL applied at veraison to vines can be suggested for total phenolics, beta-carotene, ascorbic acid, and trans-resveratrol accumulation for Alphonse Lavallee as a practical application, while the application consists of 0.6 mg L-1 of 24-eBL and 7 days after berry set + veraison + 30 days after veraison seems to be the best treatment for anthocyanin content.