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Alleviated Toxicity of Cadmium by the Rhizosphere of Kandelia obovata (S., L.) Yong

Bulletin of Environmental Contamination and Toxicology volume 93, pages 603–610 (2014)Cite this article

Abstract

A pot experiment was conducted to investigate the Cadmium (Cd) toxicity alleviated by the rhizosphere of Kandelia obovata (S., L.) Yong (K. obovata), using a rhizobox with Cd concentrations of 0, 12.5, 25, 50 and 100 mg kg−1 soil. The rhizobox used to plant K. obovata was divided into five sections by nylon cloth (S2–S5). Our results showed that pH was lower in rhizosphere than in non-rhizosphere soil. Microbial biomass C (Cmic) and N (Nmic) was stimulated in rhizosphere zone, but inhibited by Cd additions. Soil enzyme activities were significantly higher in rhizosphere (S2) than in non-rhizosphere soil (S5) (p < 0.05). In addition, DTPA-extractable Cd in different rhizosphere zone soil (S2–S5) was influenced directly under different rates of Cd supply. Moreover, Cd treatments could induce the enhancement of DTPA-extractable Cd. This study suggests that Cd toxicity can be alleviated in the rhizosphere even under high Cd supply.

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Acknowledgments

This work was kindly supported by National Important Scientific Research Program of China (2013CB956504) and National Natural Science Foundation of China (31370516, 31170471). Thank you very much for Prof. John Merefield from University of Exeter and Prof. Stephen Chapman from James Hutton in checking English grammar.

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Affiliations

  1. Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen, 361005, People’s Republic of China

    Bosen Weng, Yong Huang, Jingchun Liu, Haoliang Lu & Chongling Yan

  2. Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361005, People’s Republic of China

    Bosen Weng

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  1. Bosen Weng
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  2. Yong Huang
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  3. Jingchun Liu
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  4. Haoliang Lu
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  5. Chongling Yan
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Correspondence to Chongling Yan.

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Weng, B., Huang, Y., Liu, J. et al. Alleviated Toxicity of Cadmium by the Rhizosphere of Kandelia obovata (S., L.) Yong. Bull Environ Contam Toxicol 93, 603–610 (2014). https://doi.org/10.1007/s00128-014-1372-9

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  • DOI: https://doi.org/10.1007/s00128-014-1372-9

Keywords

  • Rhizosphere
  • pH
  • Microbial biomass
  • Soil enzyme activities
  • Cadmium
  • Kandelia obovata (S., L.) Yong