Responses ofGanoderma lucidum to heavy metals |
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Authors: | Le Xuan Tham Shinpei Matsuhashi Tamikazu Kume |
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Institution: | (1) Takasaki Radiation Chemistry Research Establishment, Japan Atomic Energy Research Institute, 370-1292 Takasaki, Gunma, Japan;(2) Present address: Nuclear Research Institute, No. 1 Nguyen Tu Luc St., Dalat, Vietnam |
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Abstract: | The lelvels of seven heavy metals and their toxicity towardGanoderma lucidum under various cultivation conditions were assessed. The contents of Mn, Cu, Zn, Cd, Hg, Pb and U in the fruitbodies of cultivatedG. lucidum, and sawdust substrates were determined to be at trace levels for U, 0.01–0.1 μg/g for Cd and Hg, and 1–5 μg/g for Pb, 10–120
μg/g for Mn, Cu and Zn. The effects of heavy metals, on the growth of mycelia ofG. lucidium in pure cultures were examined over a wide range of concentrations (10–3,000 μg/ml), and their toxicities were found to decrease
in the order: Hg>Cd>Cu>U>Pb>Mn=Zn. The translocation and accumulation of Zn from contaminated substrates (at 10 μg/g) in fruitbodies
were investigated by using65Zn tracer, andG. lucidum was found to take up Zn with an efficiency of >60%, leading to accumulation of >100 μ/g, in fruitbodies and >80 μ/g Zn in
basidiospores. |
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Keywords: | Ganoderma lucidum heavy metal toxicity tracer translocation |
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