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Growth of wheat coleoptile segments treated with exogenous IAA and its conjugates. IAA = 30 µg∙mL−1; IAA + Glu = 30 μg∙mL−1; IAA + Asp = 30 µg∙mL−1; Glu = 30 µg∙mL−1; Asp = 30 µg∙mL−1; medium (control) = medium alone. Data are means of five replicates. Error bar at each point indicates ± SE. Different letters above each bar indicate significant differences (p < 0.001).
