Abstract
To evaluate the toxic effects of ionic liquids (ILs) in soil on plants at the molecular and cellular levels and to assess the influence of anions on IL toxicity, the toxic effects of 1-decyl-3-methylimidazolium chloride ([Demim]Cl), 1-decyl-3-methylimidazolium bromide ([Demim]Br) and 1-decyl-3-methylimidazolium nitrate ([Demim]NO3) in soil on Vicia faba (V. faba) seedlings were studied for the first time. Our results show that these ILs had little impact on the growth of V. faba seedlings at 1, 5 and 25 mg kg(-1); however, the shoot length, root length, dry weight and pigment contents of the seedlings were significantly affected at 50 mg kg(-1). Furthermore, the EC50 values for effects of [Demim]Cl, [Demim]Br and [Demim]NO3 on the shoot length, root length and dry weight induced were consistent, indicating that the anion may have little influence on IL toxicity. ROS levels were also significantly enhanced at 50 mg kg(-1), resulting in cellular lipid peroxidation, DNA damage and oxidative damage.
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