Your browser doesn't support javascript.
loading
Antioxidative response of Lemna polyrrhiza L. to cadmium stress.
J Environ Biol ; 2007 Jul; 28(3): 583-9
Artículo en Inglés | IMSEAR | ID: sea-113718
ABSTRACT
Growth, lipid peroxidation, different antioxidative enzymes and metal accumulation were studied in Lemna polyrrhiza treated with different concentrations (1-40 ppm) of CdSO4. The growth of the plant was slightly enhanced with 1 ppm, while higher concentrations retarted growth and multiplication of fronds, the effect being concentration and dose dependant. Increase in malondialdehyde content was insignificant after the first week but a prolonged exposure led to significant (p < 0.05) increase of about 38% and 45% over the control in 20 and 30 ppm, respectively after four weeks. Catalase (EC 1.11.1.6; CAT) activity increased at low concentration, but it declined to 42% and 54% at 40 ppm after 6 and 30 days, respectively Superoxide dismutase (EC 1.15.1.1; SOD), ascorbate peroxidase (EC 1.11.1.11;APx) and glutathione reductase (EC 1.6.4.2) increased at both low as well at high concentrations, but a prolonged exposure to high concentration of Cd (40 ppm) led to significant (p < 0.05) decline in the mean activities of these antioxidant enzymes. Accumulation of Cd in biomass was concentration and time dependant However at high concentration of 40 ppm, Cd accumulation did not increase significantly (p < 0.05) with time. Increased activities of antioxidant enzymes in Cd treated plants suggest that metal tolerance in L. polyrrhiza might be associated to the changes of antioxidant enzymatic activities.
Asunto(s)
Texto completo: Disponible Índice: IMSEAR (Asia Sudoriental) Asunto principal: Peroxidasas / Superóxido Dismutasa / Cadmio / Peroxidación de Lípido / Catalasa / Estrés Oxidativo / Araceae / Glutatión Reductasa / Malondialdehído / Antioxidantes Idioma: Inglés Revista: J Environ Biol Año: 2007 Tipo del documento: Artículo

Similares

MEDLINE

...
LILACS

LIS

Texto completo: Disponible Índice: IMSEAR (Asia Sudoriental) Asunto principal: Peroxidasas / Superóxido Dismutasa / Cadmio / Peroxidación de Lípido / Catalasa / Estrés Oxidativo / Araceae / Glutatión Reductasa / Malondialdehído / Antioxidantes Idioma: Inglés Revista: J Environ Biol Año: 2007 Tipo del documento: Artículo