Plant diversity reduces the effect of multiple heavy metal pollution on soil enzyme activities and microbial community structure
文献类型：SCI/SSCI论文
| 作者 | Xia J.; Gao Y. |
| 发表日期 | 2012 |
| 关键词 | enzyme activity soil DNA microbial population plant diversity heavy metal amplified polymorphic dna pcr-rapd biodiversity ecosystem phytoextraction mechanisms parameters grassland biomass damage |
| 英文摘要 | It is unclear whether certain plant species and plant diversity could reduce the impacts of multiple heavy metal pollution on soil microbial structure and soil enzyme activities. Random amplified polymorphic DNA (RAPD) was used to analyze the genetic diversity and microbial similarity in planted and unplanted soil under combined cadmium (Cd) and lead (Pb) pollution. A metal hyper-accumulator, Brassica juncea, and a common plant, Festuca arundinacea Schreb, were used in this research. The results showed that microorganism quantity in planted soil significantly increased, compared with that in unplanted soil with Cd and Pb pollution. The order of microbial community sensitivity in response to Cd and Pb stress was as follows: actinomycetes > bacteria > fungi. Respiration, phosphatase, urease and dehydrogenase activity were significantly inhibited due to Cd and Pb stress. Compared with unplanted soil, planted soils have frequently been reported to have higher rates of microbial activity due to the presence of additional surfaces for microbial colonization and organic compounds released by the plant roots. Two coexisting plants could increase microbe population and the activity of phosphatases, dehydrogenases and, in particular, ureases. Soil enzyme activity was higher in B. juncea phytoremediated soil than in F. arundinacea planted soil in this study. Heavy metal pollution decreased the richness of the soil microbial community, but plant diversity increased DNA sequence diversity and maintained DNA sequence diversity at high levels. The genetic polymorphism under heavy metal stress was higher in B. juncea phytoremediated soil than in F. arundinacea planted soil. |
| 出处 | Frontiers of Environmental Science & Engineering |
| 卷 | 6 |
| 期 | 2 |
| 页 | 213-223 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 2095-2201 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/26929]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Xia J.,Gao Y.. Plant diversity reduces the effect of multiple heavy metal pollution on soil enzyme activities and microbial community structure. 2012. |
入库方式： OAI收割
来源：地理科学与资源研究所
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