title: The difference in antioxidant capacity of four alfalfa cultivars in response to Zn.
abstract: The aim of this study was to evaluate antioxidative responses in roots, stem and leaves of four alfalfa cultivars to different concentrations of zinc (Zn) (0, 300, 600 and 900 μM) for 23 days. Among the four cultivars, Aohan displayed the highest Zn concentrations in tissues and the largest Zn amount in aerial parts. Zn stress induced the production of H2O2 and increased the content of free proline and activities of antioxidative enzymes in roots, stem and leaves of Aohan. Based on the above results, we concluded that Aohan is superior to other three cultivars for Zn phyto-remediation, which indicated that Aohan is a novel Zn accumulator and able to tolerate Zn-induced toxicity by activating the antioxidative defense system.
authors.affiliation: College of Biological Science & Engineering, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, PR China. Electronic address: daihp72@aliyun.com.
authors.forename: Hui-Ping
authors.initials: HP
authors.lastname: Dai
authors.affiliation: Henan Institute of Science and Technology, Xinxiang 453003, PR China.
authors.forename: Chang-Juan
authors.initials: CJ
authors.lastname: Shan
authors.affiliation: College of Biological Science & Engineering, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, PR China.
authors.forename: Hua
authors.initials: H
authors.lastname: Zhao
authors.affiliation: College of Life Science, Northwest Agriculture & Forestry University, Yangling, Shaanxi 712100, PR China.
authors.forename: Jun-Chao
authors.initials: JC
authors.lastname: Li
authors.affiliation: College of Science, Northwest Agriculture & Forestry University, Yangling, Shaanxi 712100, PR China.
authors.forename: Gen-Liang
authors.initials: GL
authors.lastname: Jia
authors.affiliation: College of Biological Science & Engineering, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, PR China.
authors.forename: Hai
authors.initials: H
authors.lastname: Jiang
authors.affiliation: College of Biological Science & Engineering, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, PR China.
authors.forename: San-Qiao
authors.initials: SQ
authors.lastname: Wu
authors.affiliation: College of Biological Science & Engineering, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, PR China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Wang
mesh_terms: D000975:Antioxidants / Q000378:metabolism*; D006861:Hydrogen Peroxide / Q000378:metabolism; D000455:Medicago sativa / Q000187:drug effects* / Q000201:enzymology / Q000378:metabolism; D018515:Plant Leaves / Q000187:drug effects / Q000378:metabolism; D018517:Plant Roots / Q000187:drug effects / Q000378:metabolism; D011392:Proline / Q000378:metabolism; D012989:Soil Pollutants / Q000633:toxicity*; D015032:Zinc / Q000633:toxicity*
chemical_list: D000975:Antioxidants; D012989:Soil Pollutants; D011392:Proline; D006861:Hydrogen Peroxide; D015032:Zinc
keywords: Alfalfa cultivars; Antioxidant enzyme; Zinc