PHOSPHORUS ALLEVIATION OF CADMIUM PHYTOTOXICITY

• Published in: Journal of plant nutrition Vol. 25; no. 9; pp. 2027 - 2034
• Main Authors: Sajwan, K. S., Paramasivam, S, Richardson, J. P., Alva, A. K.
• Format: Journal Article
• Language: English
• Published: Philadelphia, NJ Taylor & Francis Group 03.09.2002; Taylor & Francis
• Subjects: Agronomy. Soil science and plant productions; Biological and medical sciences; Fundamental and applied biological sciences. Psychology; Non agrochemicals pollutants; Phytopathology. Animal pests. Plant and forest protection; Pollution effects and side effects of agrochemicals on crop plants and forest trees. Other anthropogenic factors; Pollution effects. Side effects of agrochemicals; Soil and water pollution; Soil science; Macronutrient(mineral); Cadmium; Laboratory study; Nutrition; Nutrient solution; Phosphorus; Bioinorganic chemistry; Soil pollution; Inorganic element; Glycine max; Phosphorus addition; Heavy metal; Grain legume; Phytotoxicity; Leguminosae; Dicotyledones; Hydroponic cultivation; Angiospermae; Poison; Attenuation; Spermatophyta; Soil plant relation; Oil plant (vegetal)
• ISSN: 0190-4167; 1532-4087
• DOI: 10.1081/PLN-120013292

A hydroponic study was conducted under controlled environmental conditions to determine the effect of phosphate addition on cadmium (Cd) toxicity to soybeans (Glycine max L. Cutiva perron) plants. Three-week-old soybean plants previously grown on perlite for two weeks and additional seven days on 'Hoagland' nutrient solution without Cd supply were transferred to solutions containing either 0, 0.075 or 0.15 mg Cd L −1 . Each of these Cd treatment received either 0.4, 0.6, or 0.8 M phosphorus (P) as KH 2 PO 4 and the seedlings were grown for additional 33 d. Results of this study indicated that irrespective of Cd level in the growing solution, phosphate addition alleviated Cd toxicity in soybean. The addition of as little as 0.4 M phosphate alleviated biomass reductions induced by 0.075 mg Cd L −1 . The alteration in tissue Cd concentrations brought about by phosphate addition may reveal an antagonistic effect between P and Cd.