Plant Soil Environ., 2011, 57(11):519-525 | DOI: 10.17221/345/2011-PSE
Effect of tungsten on growth, biochemical constituents, molybdenum and tungsten contents in wheat
- Laboratory of Geobotany and Biogeochemistry, Department of Botany, University College of Science, Mohanlal Sukhadia University, Udaipur, Rajasthan, India
The effect of various concentrations (3, 9, 27, 81, and 243 mg/kg) of tungsten (W) on growth performance, biochemical constituents and tungsten and molybdenum (Mo) contents in wheat was observed. Lower doses (up to 9 mg/kg) of tungsten showed promotory effects whereas higher doses retarded. An increment in growth, biomass, chlorophyll and carbohydrate contents was observed. Tungsten contents in root and shoot showed a very strong linear dependence on the soil applied W contents. Mo contents in plant tissue showed an increase with an increase in the W contents in plant tissue up to a threshold after which it showed an abrupt decrease. The activity of peroxidase enzyme decreased with lower application of W. Higher administration of tungsten (27-243 mg/kg) resulted in increased total phenol, free proline and activity of enzyme peroxidase.
Keywords: oxidative stress; toxic elements; sodium tungstate; plant stress metabolism; pigments; Triticum aestivum L.
Published: November 30, 2011 Show citation
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