Effect of abscisic acid foliar applications on phytochemical content and antioxidant capacity of purple and orange carrots

MAURICCI, MARIANO TOMAS; MALOVINI, EMILIANO; VALERGA, LUCÍA; CAVAGNARO, PABLO FEDERICO

Rosario, Sana Fe

Congreso; RAFV 2023; 2023

Sociedad Argentina de Fisiologia Vegetal

Abscisic acid (ABA) plays a central role in regulating various physiological processes that help the plant survive and adapt to stressful conditions. In a number of species, exogenous foliar applications of ABA increased the total content of anthocyanins and phenolics in the applied organs, generally fruits and leaves. The objective of this study was to evaluate the effect of foliar applications of ABA on four carrot varieties: Black Nebula (BN); Purple Elite (PE), Cosmic Purple (CPP), and Shin Kuroda (SK). Weekly foliar ABA applications were initiated 60 days after sowing and until harvest, using five different concentrations: 0 (control), 10, 50, 100, and 200 ppm. When the roots reached commercial size they were harvested. Total anthocyanins (TA), total phenolics (TP), and antioxidant capacity (AC) levels were determined using the differential pH, Folin-Ciocalteu, and FRAP procedures, respectively. A significant genotype-related response was found (p