Changes on Bioactive Compounds and Electrochemical Characteristics of cv. Horoz Karası Table Grape (V. vinifera L.) Induced by Various Doses of Preharvest Applications of Benzoic Acid, Citric Acid and Oxalic Acid at Berry Setting and Verasion Periods

Abstract

Foliar applications, which have been used in agriculture for many years, are one of the useful strategies to apply nutrients and chemicals directly to leaves and fruits for improving quality properties in various fruit species. In present study, the effectiveness of preharvest applications with benzoic acid (BA), citric acid (CA) and oxalic acid (OA) at three doses (0, 1000 and 1500?ppm) at two periods of berry growth, including berry setting period (P1) and verasion period (P2) on bioactive compounds and electrochemical response of cv. Horoz Karası were investigated in 2015 growing season. Study findings indicated that rising application doses of phenolic acids, including Benzoic Acid (BA), Oxalic Acid (OA) and Citric Acid (CA) at verasion period (P2) had considerable effects on table grape quality properties of cv. Horoz Karası than same doses of phenolic acids applications at berry setting period (P1). The highest increases in contents of total phenolic compounds, total anthocyanin and electrochemical characteristic were respectively encouraged by applications of BAP2 1500?ppm, BAP2 1000?ppm, OAP2 1500?ppm, OAP2 1000?ppm, CAP2 1500?ppm, CAP2 1000?ppm. © 2019, Springer-Verlag GmbH Deutschland, ein Teil von Springer Nature.