title: Effects of Pb and Ni stress on oxidative stress parameters in three moss species.
abstract: Antioxidative responses of the mosses Hypnum plumaeforme, Thuidium cymbifolium, and Brachythecium piligerum to short-term Pb and Ni stress were investigated. Both Pb and Ni treatment increased the formation of reactive oxygen species and lipid peroxidation, decreased superoxide dismutase (SOD), and catalase (CAT) activities in H. plumaeforme and T. cymbifolium. However, SOD activity in B. piligerum was increased under 10mM Pb stress and Ni increased CAT activity in B. piligerum under 1mM Ni stress. Peroxidase (POX) activity in the three mosses was increased by Pb and Ni exposure, indicating that POX plays an important role in preventing heavy metal-induced oxidative stress. The accumulation of O(2)(-) and H(2)O(2) in mosses is related to the decline in SOD and CAT activities. B. piligerum is the most sensitive and T. cymbifolium is the most tolerant species to Pb and Ni stress among the three bryophytes.
authors.affiliation: Key Laboratory of Mountain Environment Evolvement and Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Science, No. 9, Block 4, South Renmin Road, Chengdu 610041, China. shouqinsun@imde.ac.cn
authors.forename: Shou-Qin
authors.initials: SQ
authors.lastname: Sun
authors.forename: Gen-Xu
authors.initials: GX
authors.lastname: Wang
authors.forename: Ming
authors.initials: M
authors.lastname: He
authors.forename: Tong
authors.initials: T
authors.lastname: Cao
mesh_terms: D015415:Biomarkers / Q000378:metabolism; D019068:Bryopsida / Q000187:drug effects* / Q000378:metabolism; D002374:Catalase / Q000378:metabolism; D004785:Environmental Pollutants / Q000633:toxicity*; D006861:Hydrogen Peroxide / Q000378:metabolism; D007854:Lead / Q000633:toxicity*; D015227:Lipid Peroxidation / Q000187:drug effects; D009532:Nickel / Q000633:toxicity*; D018384:Oxidative Stress; D009195:Peroxidase / Q000378:metabolism; D010544:Peroxidases / Q000378:metabolism; D017382:Reactive Oxygen Species / Q000378:metabolism; D013482:Superoxide Dismutase / Q000378:metabolism
chemical_list: D015415:Biomarkers; D004785:Environmental Pollutants; D017382:Reactive Oxygen Species; D007854:Lead; D009532:Nickel; D006861:Hydrogen Peroxide; D010544:Peroxidases; D002374:Catalase; D009195:Peroxidase; D013482:Superoxide Dismutase