title: Chronic accumulation of cadmium and its effects on antioxidant enzymes and malondialdehyde in Oxya chinensis (Orthoptera: Acridoidea).
abstract: The accumulation of cadmium (Cd) and its effects on antioxidant enzyme activities and malondialdehyde (MDA) levels of Chinese rice grasshopper (Oxya chinensis) were evaluated under the laboratory conditions. Our results showed that Cd accumulation in O. chinensis exhibited a concentration-dependent increase in both males and females under Cd pollution. Environmental Cd can lead to the absorption of large quantities of Cd, which induces oxidative damage in insects by altering antioxidant defense enzyme systems. Our results demonstrated that Cd stress caused a significant decrease in glutathione peroxidase (GPx) levels and a significant increase in superoxide (SOD) dismutase and catalase (CAT) activities. In the grasshoppers, the MDA content was also enhanced, with an increase in Cd concentrations and a positive correlation between them; for females from second instar nymphs to the adult stage, R(2) was 0.6467, 0.9136, 0.6516, 0.942 and 0.7182, whereas for males, it was 0.6467, 0.8239, 0.9302, 0.7861, 0.8632, respectively. We also observed differences in the effects of Cd between grasshoppers of different developmental stages and genders, which suggested that the insect's developmental stage and sex should be considered when studying enzyme activity.
authors: Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi 030006, China.
authors: Yuping
authors: Y
authors: Zhang
authors: Ge
authors: G
authors: Sun
authors: Meiling
authors: M
authors: Yang
authors: Haihua
authors: H
authors: Wu
authors: Jianzhen
authors: J
authors: Zhang
authors: Shaojuan
authors: S
authors: Song
authors: Enbo
authors: E
authors: Ma
authors: Yaping
authors: Y
authors: Guo
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000378:metabolism; D002104:Cadmium / Q000378:metabolism / Q000633:toxicity*; D002374:Catalase / Q000378:metabolism; D004785:Environmental Pollutants / Q000378:metabolism / Q000633:toxicity*; D005260:Female; D005979:Glutathione Peroxidase / Q000378:metabolism; D006110:Grasshoppers / Q000187:drug effects* / Q000201:enzymology / Q000378:metabolism; D008297:Male; D008315:Malondialdehyde / Q000378:metabolism*; D009758:Nymph / Q000187:drug effects / Q000201:enzymology / Q000378:metabolism; D010084:Oxidation-Reduction; D036226:Seedlings / Q000378:metabolism; D013482:Superoxide Dismutase / Q000378:metabolism; D014908:Triticum / Q000378:metabolism
chemical_list: D000975:Antioxidants; D004785:Environmental Pollutants; D002104:Cadmium; D008315:Malondialdehyde; D002374:Catalase; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase