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Hydroponic experiments were conducted to examine the effects of anthranilic acid on nickel ion (Ni) absorption by Olea europaea plants. The concentration of each of Ni and anthranilic acid in the hydroponic mixtures was varied from 0.000 to 0.025 M. Seedlings of olive (Olea europaea) obtained from a garden at the Department of Forestry and Wild life, Kano University of Science and Technology, Wudil and identified by Baha’uddeen Said Adam of the Department of Plant Science, Bayero University, Kano were replanted in the green house of Biological Sciences Department, Bayero University Kano. The change in plant weight (ΔWP), determined by subtracting the weight before planting from the corresponding weight after harvest decreased highly significantly (p<0.001) as the concentration of Ni was increased from 0 to 0.0250 M and anthranilic acid kept constant at 0, 0.0025 and 0.025 M respectively. The concentrations of root and shoot Ni increased highly significantly (p<0.001). The Ni translocation factor (TF) increased highly significantly (p<0.001) in the absence of anthranilic acid. As the concentration of anthranilic acid was increased to 0.0025 and 0.025 M, values of TF were less than 1 which signified increased retention of Ni in olive (Olea europaea) roots with very little translocation to the shoots. Chlorophyll a and chlorophyll b contents of the olive (Olea europaea) seedlings first increased when the concentration of Ni2+ was increased from 0 to 0.0250 M in absence of anthranilic acid. But, increasing the concentration of anthranilic acid to 0.0025 and 0.025 M decreased the contents of these pigments. KeywordsAnthranilic acid; Ni; Oleaeuropaea; Zn;

Effects of anthranilic acid on nickel absorption by olive (Olea europaea) seedlings replanted in hydroponic solutions