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ISSN : 2287-8327

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Vol.27 No.5
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Effect of Cadmium on Radial Growth and Dry Mass Production of Ectomycorrhizal Fungi

Journal of Ecology and Environment / Journal of Ecology and Environment, (P)2287-8327; (E)2288-1220
2004, v.27 no.5, pp.301-306

Sally Anne Power (Imperial College London)
John Nigel Berridge Bell (Imperial College London)
Sally, A. P. , & John, N. B. B. (2004). Effect of Cadmium on Radial Growth and Dry Mass Production of Ectomycorrhizal Fungi. Journal of Ecology and Environment, 27(5), 301-306.
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Abstract

The sensitivity to Cd of three ectomycorrhizal fungi, Paxillus involutus, Suillus bovinus and Rhizopogon subcaerulescens, was assessed and compared in terms of radial growth and dry mass production, using both agar and liquid culture. The radial growth of S. bovinus and R. subcaerulescens was significantly reduced at the lowest concentration (0.1 mg Cd/L). The 50% effective concentration (EC50) values calculated from radial growth rates of the ectomycorrhizal fungi showed that the sensitivity of the fungi to Cd was greatest in S. bovinus and lowest in R. subcaerulescens. Cadmium addition also significantly decreased dry mass production of the ectomycorrhizal fungi. The sensitivity of the fungi to Cd in terms of dry mass production, was greatest in S. bovinus and lowest in P. involutus. Higher growth rates of P. involutus and melanisation of R. subcaerulescens appeared to contribute to reduced Cd toxicity.

keywords
Cadmium toxicity, Dry mass production, Ectomycorrhizal fungi, Effective concentration, Radial growth

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