Fig. 2. Net NO^-₃ uptake by roots of Pima cotton grown in 0.10 mM NO^-₂ for 2 d, then exposed to uptake solutions containing 0.1 mM NO^-₃ ± 10 mM NH⁺₄. Uptake rates were determined after 0, 15, and 60 min treatment with NH⁺₄. Root NO^-₃ concentration was 1.8 ± 0.3 µmol g^-1 FW. Vertical lines above the bars represent the respective +SE of the means of four replicates.

Return to article