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- W2364796893 abstract "Pteris vittata L.,one of arsenic(As) hyperaccumulators,can accumulate high concentration arsenic and show no signs of toxicity,indicating the existence of effective plant-internal detoxification mechanisms.In order to elucidate the role of anti-oxidative system in P.vittata arsenic detoxification mechanisms,the concentrations of malonyldiadehyde(MDA),acidsoluble thiols,chlorophyll and carotenoid,and the activities of catalase(CAT) and peroxidase(POD) in P.vittata callus under 0,0.5,1,and 2 mmol/L arsenate,arsenite and dimethylarsenic acid(DMA) stress were determined.A significant increase in MDA concentration was observed under arsenate and DMA exposure,while no significant induction of MDA in 1 mmol/L arsenite treated callus.Under arsenite exposure,the acid-soluble thiols concentrations were significantly elevated,the activities of CAT and POD were enhanced in response to the increasing of arsenic concentration,chlorophyll,and carotenoid concentrations.While under arsenate and DMA exposure,the acid-soluble thiols concentrations were significantly reduced,the activities of CAT and POD increased with arsenic concentration rising to 0.5 mmol/L,and then decreased.Higher activities of anti-oxidative enzymes and lower MDA concentration suggest that the toxicity of arsenite may lower than that of arsenate and DMA.These results indicate both acid-soluble thiols and enzymatic antioxidants(CAT and POD) play important roles in P.vittata arsenic detoxification system.Fig 4,Ref 22" @default.
- W2364796893 created "2016-06-24" @default.
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- W2364796893 date "2010-01-01" @default.
- W2364796893 modified "2023-09-25" @default.
- W2364796893 title "Role of Antioxidative System in Arsenic Detoxification Mechanism of Pteris vittata Cells" @default.
- W2364796893 hasPublicationYear "2010" @default.
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