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Assessment on Cadmium and Lead in soil based on rhizosphere microbial community


The soil ecosystem is easily polluted by heavy metals. Cadmium (Cd) and Lead (Pb), as the main pollutants of heavy metals will do much harm to the safety of soil ecosystem. However, the impact on rhizosphere microorganism of the two chemicals remains almost unknown. The change of catalase (CAT) activity was consistent with the microbial biomass. 16S rRNA gene sequencing was performed on soil samples to study the toxic effect of heavy metals. Sequence analysis at Phylum and Family taxonomic levels showed that 32 identified phyla and 303 families were observed. The dominant phylum was Proteobacteria followed by Bacteroidetes, Acidobacteria, Actinobacteria. The relative abundance of the dominant phyla was obviously changed under the stress of Cd and Pb, suggesting that the heavy metal input had affected microbial community structure. In Order and Family levels, there was different variation of richness and diversity in Cd and Pb group compared with the control group. Furthermore, abundance and similarity analysis showed the differences between Cd and Pb indicating different toxicology effect on rhizosphere microbial communities because of the unique properties. This study provided a novel insight into the composition of microbial communities of rhizosphere which could be used to evaluating the soil environment.

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Publication details

The article was received on 17 Feb 2017, accepted on 16 Jun 2017 and first published on 16 Jun 2017

Article type: Paper
DOI: 10.1039/C7TX00048K
Citation: Toxicol. Res., 2017, Accepted Manuscript
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    Assessment on Cadmium and Lead in soil based on rhizosphere microbial community

    H. Yang, X. Zhang and Z. Cui, Toxicol. Res., 2017, Accepted Manuscript , DOI: 10.1039/C7TX00048K

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