Effect of heavy metal-solubilizing microorganisms on zinc and cadmium extractions from heavy metal contaminated soil with Tricholoma lobynsis

The macrofungus, Tricholoma lobynsis , was chosen to remedy Zn–Cd–Pb contaminated soil. To enhance its metal-extracting efficiency, two heavy metal resistant microbes M6 and K1 were applied owing to their excellent abilities to solubilize heavy metal salts. The two isolated microbial strains could a...

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Bibliographic Details
Published in:World journal of microbiology & biotechnology 2012, Vol.28 (1), p.293-301
Main Authors: Ji, Ling-yun, Zhang, Wei-wei, Yu, Dong, Cao, Yan-ru, Xu, Heng
Format: Article
Language:English
Subjects:
Acetic acid
Analysis
Applied Microbiology
Bacteria
Base Sequence
Biochemistry
Biodegradation, Environmental
Biomedical and Life Sciences
Bioremediation
Biotechnology
Cadmium
Cadmium - isolation & purification
Cadmium - pharmacokinetics
Cadmium - toxicity
DNA, Fungal - genetics
Environmental Engineering/Biotechnology
Fungi
Heavy metal content
Heavy metals
Lead
Life Sciences
Metals, Heavy - isolation & purification
Metals, Heavy - pharmacokinetics
Metals, Heavy - toxicity
Microbiology
Microorganisms
Mushrooms
Original Paper
Plant growth
Plant Growth Regulators - metabolism
Rhodotorula mucilaginosa
Serratia marcescens
Soil contamination
Soil Microbiology
Soil Pollutants - isolation & purification
Soil Pollutants - pharmacokinetics
Soil Pollutants - toxicity
Soil pollution
Solubility
Studies
Tricholoma
Tricholoma - genetics
Tricholoma - isolation & purification
Tricholoma - metabolism
Zinc - isolation & purification
Zinc - pharmacokinetics
Zinc - toxicity
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Summary:The macrofungus, Tricholoma lobynsis , was chosen to remedy Zn–Cd–Pb contaminated soil. To enhance its metal-extracting efficiency, two heavy metal resistant microbes M6 and K1 were applied owing to their excellent abilities to solubilize heavy metal salts. The two isolated microbial strains could also produce indole acetic acid (IAA), siderophore and solubilize inorganic phosphate, but neither of them showed 1-aminocyclopropane-1-carboxylate deaminase activity. The strains M6 and K1 were identified as Serratia marcescens and Rhodotorula mucilaginosa based on 16S rDNA and ITS sequence analysis respectively. Pot experiment showed that spraying to T. lobynsis -inoculated soil with M6 and K1 respectively could increase total Cd accumulations of this mushroom by 216 and 61%, and Zn by 153 and 49% compared to the uninoculated control. Pb accumulation however, was too low (
ISSN:0959-3993
1573-0972
DOI:10.1007/s11274-011-0819-y