Phytoremediative Potential of Tobacco under Deficit Irrigation Conditions for Ni-Polluted Soil
Hatice Dağhan1, Veli Uygur2, Derya Önder3, Sermet Önder4
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1Soil Science and Plant Nutrition Department, Agriculture Faculty,
Eskisehir Osmangazi University, 26160 Eskisehir, Turkey
2Soil Science and Plant Nutrition Department, Agriculture Faculty,
Süleyman Demirel University, 32000 Isparta, Turkey
3Agricultural Structure and Irrigation Department, Agriculture Faculty,
Çukurova University, 01100 Adana, Turkey
4Biosystem Engineering Department, Agriculture Faculty,
Mustafa Kemal University, 31040 Hatay, Turkey
Pol. J. Environ. Stud. 2014;23(4):1313-1316
The aim of this study was to investigate the possibility of reclaiming Ni-polluted soils by phytoremediation under deficit irrigation conditions. Tobacco, Nicotiana rustica, was grown for 6 weeks at four different irrigation rates (100, 80, 60, and 40% of irrigation requirement) and four nickel concentrations (0, 50, 100, and 200 mg Ni·kg-1 soil) applied from NiSO4. Nickel toxicity, water stress symptoms, dry shoot biomass, Ni concentration, and Ni uptake were followed. Neither Ni treatment nor water stress-induced Ni toxicity were observed, and there was no treatment-induced difference in chlorophyll content of leaves. With the increasing Ni application, there was a gradual increase in Ni concentration of the shoots from the 40% irrigation through 100% irrigation. As a result, the ability of tobacco to accumulate Ni at high concentration can enable it to be used for phytoremediation of Ni-polluted soils despite the fact that water deficit limits Ni accumulation to some extent.
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