Fig. 3From: Chitosan nanoparticles improve physiological and biochemical responses of Salvia abrotanoides (Kar.) under drought stressEffects of different concentration of chitosan nanoparticles (CNPs) (30, 60 and 90 ppm) and drought stress levels (30, 50, and 100% FC) on carotenoid content in leaves of S. abrotanoides. Values are means ± SD (n = 4). According to Duncan’s Multiple Range Test, different bar letters indicate significant differences among treatments (P ≤ 0.05)Back to article page