Your browser doesn't support javascript.
loading
Effects of cadmium on bioaccumulation and biochemical stress response in rice (Oryza sativa L.).
Xie, Pan-pan; Deng, Juan-wei; Zhang, Hui-min; Ma, You-hua; Cao, De-ju; Ma, Ru-xiao; Liu, Ren-jing; Liu, Cheng; Liang, Yue-gan.
Afiliação
  • Xie PP; School of Resource and Environment, Anhui Agricultural University, Hefei 230036, People's Republic of China.
  • Deng JW; School of Resource and Environment, Anhui Agricultural University, Hefei 230036, People's Republic of China.
  • Zhang HM; School of Resource and Environment, Anhui Agricultural University, Hefei 230036, People's Republic of China.
  • Ma YH; School of Resource and Environment, Anhui Agricultural University, Hefei 230036, People's Republic of China.
  • Cao DJ; School of Resource and Environment, Anhui Agricultural University, Hefei 230036, People's Republic of China. Electronic address: cdj@ahau.edu.cn.
  • Ma RX; School of Resource and Environment, Anhui Agricultural University, Hefei 230036, People's Republic of China.
  • Liu RJ; School of Resource and Environment, Anhui Agricultural University, Hefei 230036, People's Republic of China.
  • Liu C; School of Resource and Environment, Anhui Agricultural University, Hefei 230036, People's Republic of China.
  • Liang YG; School of Resource and Environment, Anhui Agricultural University, Hefei 230036, People's Republic of China.
Ecotoxicol Environ Saf ; 122: 392-8, 2015 Dec.
Article em En | MEDLINE | ID: mdl-26363148
This study investigated the effects of various Cd concentrations on the bioaccumulation, antioxidative defense, and stress responses of rice (Oryza sativa L.). The distribution characteristics of Cd in rice were in the following order: roots>stems>grains. The bioconcentration factor values of Cd increased at concentrations lower than 3.00 mg Cd/kg and approximately decreased to a constant value at concentrations higher than 3.00 mg Cd/kg. Rice showed a higher Cd accumulation potential at low Cd concentrations than at high Cd concentrations. The Freundlich isotherm model described well the adsorption isotherms of Cd in rice roots. The biosorption mechanism of rice roots was determined to be cooperative adsorption. The malondialdehyde (MDA) content increased at a concentration range of 0.00-5.00 mg/L, indicating the enhancement of lipid peroxidation. By contrast, the MDA content slightly decreased at concentrations higher than 5.00 mg/L. Peroxidase (POD) activity exhibited active response to oxidative stress at concentrations lower than 5.00 mg/L but was inhibited at concentrations higher than 5.00 mg/L. The response to Cd stress of the N-H, O-H and C-O functional groups in rice shoots was observed via Fourier transform infrared spectroscopy.
Assuntos
Palavras-chave

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Oryza / Poluentes do Solo / Cádmio / Estresse Oxidativo Tipo de estudo: Prognostic_studies Idioma: En Revista: Ecotoxicol Environ Saf Ano de publicação: 2015 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Oryza / Poluentes do Solo / Cádmio / Estresse Oxidativo Tipo de estudo: Prognostic_studies Idioma: En Revista: Ecotoxicol Environ Saf Ano de publicação: 2015 Tipo de documento: Article