EXTRACT OF Heterotheca inuloides CASS. AS A BIOSTIMULANT OF THE GROWTH AND QUALITY OF Rubus idaeus L. UNDER SALT STRESS

Arnica in raspberries under salinity

Abstract

The raspberry (Rubus idaeus L.) is affected by different types of stress, among them is salt stress; this cause a decrease in production and quality of the fruit. The objective of this study was to evaluate the effect of arnica extract in raspberry plants under salt stress conditions (four concentrations of sodium chloride, 0 mM, 30 mM, 50 mM and 80 mM) and with application of arnica extract (1000 mg L^-1) and plants without sodium chloride application and without application of extract. In plants exposed to salt stress with the application of arnica extract increases the concentration of anthocyanins, phenols, flavonoids, antioxidant activity by ABTS, total sugars, antioxidant enzymes such as superoxide dismutase, and peroxidase in raspberry fruits var. Adelita. These results suggest that the application of H. inuloides extract in raspberry plants under salt stress strengthens the enzymatic and non-enzymatic antioxidant system in var raspberry fruits var. Adelita.