Influence of abscisic acid,Ascophyllum nodosumandAloe veraon the phenolic composition and color of grape berry and wine of 'Cabernet Sauvignon' variety

Abstract

In viticulture, various techniques can be used to improve productivity, tolerance to biotic or abiotic stress, the quality of grapes and wines such as the use of plant regulators and biostimulants. Thus, the objective of this work was to evaluate the effect of application of abscisic acid (S-ABA), Ascophyllum nodosum (A. nodosum) seaweed extract and Aloe vera (A. vera) gel on phenolic composition and chromatic characteristics of grapes from the 'Cabernet Sauvignon' variety. The experiment was conducted in a commercial vineyard in Campo Largo - Paraná, in two consecutive seasons, 2017/18 and 2018/19, involving the following treatments: 1) control; 2) (S-ABA) 400 mg/L; 3) S- ABA 600 mg/L; 4) A. vera gel 200 mL/L; 5) A. vera gel 400 mL/L; 6) seaweed extract 0.2 mL/L; 7) seaweed extract 0.4 mL/L. Two applications were performed with the seaweed extract and A. gel when the bunches were at veraison stage (50 and 75% of grape berries with coloration). Total anthocyanins content, total polyphenols content and activity of phenylalanine ammonia-lyase (PAL), polyphenoloxidase and peroxidase enzymes were assessed in the berries skin. Total anthocyanins, individual anthocyanins and total polyphenol contents as well as lightness, chroma and hue angle were analyzed in the corresponding wines. S-ABA increased the content of anthocyanins and total polyphenols, as well as the activity of PAL in the first season. A. nodosum (AN) seaweed extract increased the total polyphenol content, total anthocyanins content and PAL in the berry skin of 'Cabernet Sauvignon' variety. S-ABA increased the total polyphenol content and anthocyanins in wine, as well as the A. nodosum, in at least one of the evaluated seasons.

Effect of foliar application with some natural and chemical compounds on yield of Ruby Seedless grape cultivar

“…Aloe vera leaves contain bioactive compounds such as antioxidants. Application of Aloe vera was used on fruit trees to improve grape productivity and quality (Pessenti et al, 2022) or two extend the shelf life of grape under storage (Farahi, 2015 andAlberio et al, 2015).…”

“…Seaweed extracts are used in grapevines for enhancing vine growth and yield of grape cultivars. Many investigators found that, the seaweed extract stimulated the vegetative growth and increased yield with better berry quality (Norrie and Keathley, 2005;Kok et al, 2010;Ahmed et al, 2013;Carvalho et al, 2019;Salvi et al, 2019;Taskos et al, 2019 andPessenti et al, 2022).…”

Commercial uses of antitranspirants in crop production: A review

“…Chile was the first country to register and commercially use s-ABA between 2009(Valent BioSciences Co., 2009. ProTone ® also improves fruit quality, for example, in grapes, it enhances the anthocyanins and total polyphenol contents (Pessenti et al, 2022). In Australia, six case studies on ProTone ® , involving five grape vine varieties, demonstrated yield benefit and higher market prices (Sumitomo Chemical Australia Pty Ltd, 2019).…”

Effects of Global Warming on Grapevine Berries Phenolic Compounds—A Review

“…Aggrandized the total polyphenol content, total anthocyanins amount, and PAL in the berry skin. [194] Ascophyllum nodosum can be a sustainable management tool to lessen the short-period shock of severe temperatures and strong light irradiance in grapevines; in fact, it was found that it was able to encourage a prompt photosynthetic recovery after drought stress [184]. In addition to this, numerous studies have highlighted its positive effect on the phenolic composition of berries [189,192,194].…”