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Modulation of the efficiency of trace metal phytoremediation by Sedum plumbizincicola by microbial community structure and function

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Abstract

Aims

Recent research on the rhizosphere microbiome indicates that plants may benefit more from microbial communities than from individual members in a community. The link between soil microbiome and plant performance remains poorly understood during trace metal phytoremediation by hyperaccumulator plants. The effect of different microbiomes on the cadmium (Cd)/zinc (Zn) phytoextraction efficiency of Sedum plumbizincicola was therefore explored.

Methods

Different microbiomes were set up using γ-irradiation and vancomycin addition and a pot experiment was conducted. The microbial communities were characterized using high-throughput sequencing and their functions were predicted.

Results

Plant Cd and Zn contents in the vancomycin-amended treatment were about 38–46% and 35%–53% respectively lower than those in the other treatments. Bacterial composition and diversity were substantially changed by γ-irradiation and vancomycin addition but plant trace metal accumulation did not change subsequently. The bacterial functional profiles were very different following treatment with vancomycin compared with the other treatments at KEGG orthology hierarchy level 3. Genes related to up-regulated biofilm formation and down-regulated siderophore synthesis may partly contribute together to the low plant trace metal accumulation following vancomycin treatment.

Conclusions

Specific bacterial community function rather than bacterial community diversity and composition may affect trace metal uptake by hyperaccumulator plants.

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Acknowledgements

This research was supported by the National Natural Science Foundation of China (41230858, 41325003), the Key Projects in the National Science and Technology Pillar Program (2015BAD05B04) and the Science and Technology Program of Jiangsu, China (SBK2014043721).

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Authors and Affiliations

  1. Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China

    Jinyu Hou, Wuxing Liu, Longhua Wu, Pengjie Hu, Tingting Ma, Yongming Luo & Peter Christie

  2. University of Chinese Academy of Sciences, Beijing, 100049, China

    Jinyu Hou

  3. Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, China

    Yongming Luo

Authors
  1. Jinyu Hou
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  2. Wuxing Liu
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  3. Longhua Wu
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  4. Pengjie Hu
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  5. Tingting Ma
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  6. Yongming Luo
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  7. Peter Christie
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Correspondence to Wuxing Liu.

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Responsible Editor: Antony Van der Ent.

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Hou, J., Liu, W., Wu, L. et al. Modulation of the efficiency of trace metal phytoremediation by Sedum plumbizincicola by microbial community structure and function. Plant Soil 421, 285–299 (2017). https://doi.org/10.1007/s11104-017-3466-8

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  • DOI: https://doi.org/10.1007/s11104-017-3466-8

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