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Cadmium toxicity induced changes in plant water relations and oxidative metabolism of Brassica juncea L. plants.
J Environ Biol ; 2003 Jan; 24(1): 107-12
Article in English | IMSEAR | ID: sea-113475
ABSTRACT
Excess of cadmium (Cd) induced changes in oxidative scenario and water status of plants viz.., total water content, specific water content, water saturation deficit (WSD) and transpiration of Brassica juncea plants grown in soil pot culture. Although lower and marginal levels of excess cadmium (100 and 250 ppm) improved growth but higher levels (500 ppm) caused significant suppression. Significant accumulation of proline, an indicator of water stress, occurred at higher level of Cd. Gradual increases in activities of certain antioxidant enzymes such as catalase and peroxidase along with increased lipid peroxidation are suggestive of disturbed oxidative metabolism. Taking together, the deleterious effects of Cd and its effects on oxidative metabolism clearly indicate enhanced generation of reactive oxygen species (ROS) to be instrumental in producing toxic effects of Cd. The excess levels of Cd also decreased the concentrations of soluble protein and chlorophylls and increased the ratio of chlorophyll a/b.
Subject(s)
Full text: Available Index: IMSEAR (South-East Asia) Main subject: Water Pollutants / Brassica / Cadmium / Lipid Peroxidation / Catalase / Chlorophyll / Peroxidase / Oxidative Stress Language: English Journal: J Environ Biol Year: 2003 Type: Article

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Full text: Available Index: IMSEAR (South-East Asia) Main subject: Water Pollutants / Brassica / Cadmium / Lipid Peroxidation / Catalase / Chlorophyll / Peroxidase / Oxidative Stress Language: English Journal: J Environ Biol Year: 2003 Type: Article