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| Plants and Microorganisms Synergistically Remediate Soil Lead Pollution |
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Received:September 23, 2020
Revised:September 25, 2020
Accepted:September 30, 2020
Published Online:February 22, 2021
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| DOI：doi：10.3969/j.issn.1007-7545.2021.03.019 |
| KeyWord:soil heavy metal pollution; lead; microorganism; phytoremediation |
| Author | Institution |
| SUN Nan |
贵州师范大学 |
| ZHANG Shengshuang |
贵州师范大学 |
| ZHANG Lingyun |
贵州师范大学 |
| WANG Ji |
贵州师范大学 |
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| Abstract: |
| Indoor potted experiments were conducted to study combined repair effects of Rudbeckia hirta, Lolium perenne, Paecilomyces sp and Stenotrophomonas maltophilia treated with different concentrations of Pb. The results show that Paecilomyces sp and Stenotrophomonas maltophilia can promote growth of Rudbeckia and Lolium under Pb stress, alleviate toxicity of Pb to plants, and have characteristics of stress inducing growth-promoting effect of plants. When concentration of exogenous added Pb in soil is 1 500 mg/kg, Paecilomyces sp can significantly increase enrichment coefficient and transport coefficient of Rudbeckia, effectively promote absorption of Pb by plants, and increase transfer of Pb to above-ground parts. Both strains can promote growth of Lolium, significantly improve Pb accumulation ability of Lolium, hold Pb in root of plant, and effectively inhibit migration of Pb to upper part of plant. The two strains have the best effect when they are simultaneously inoculated. |
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