Akbas, HalideDane, FeruzanMeric, Ciler2024-06-122024-06-1220090301-12080975-0959https://hdl.handle.net/20.500.14551/18295The effect of different concentrations of nickel nitrate (0.25, 0.50, 1.00 and 2.00 mM) uptake by the roots, on root growth of onion (Allium cepa) and the transport of Ni2+, Fe2+, Mn2+, Zn2+, K+, Na+ and H+ ions were investigated spectrophotometrically. The uptake of Ni2+, Fe2+, Mn2+ and Zn2+ was monitored by flame atomic absorption spectrometry with a 24-h period for 7 days and the amounts of K+ and Na+ were determined in solutions by flame photometer, The mineral content of the solution, instead of the root material was measured. Ni2+ ions showed inhibitory effect oil the root growth at all concentrations during the entire treatment. The EC50 (effective concentration that reduced root growth by 50%) was found at 0.25 mM Ni2+. No significant change in inhibitory effect was observed after at 0.50 mM Ni2+ concentrations. A large amount of Ni2+ was translocated into the roots. The kinetics of metal ion transport followed a pseudo-first order reaction in all metal ion concentrations. Ni2+, Zn2+ Fe2+ Mn2+ and H+ ions transferred together into plant, but Na+ and K+ ions transferred to the solution from the plant. The amount of H+ in the solution decreased at all Ni2+ concentrations.eninfo:eu-repo/semantics/closedAccessAllium Cepa LAtomic Absorption SpectrometryFlame PhotometerNickelPhytotoxic EffectOxidative DamagePrimary LeavesLocalizationCellsProteinArticle464332336Q4WOS:0002700057000082-s2.0-8492424307219788066Q4