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Ecotoxicology and environmental safety v.147, 2018년, pp.206 - 216   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Root-induced changes of Zn and Pb dynamics in the rhizosphere of sunflower with different plant growth promoting treatments in a heavily contaminated soil

Mousavi, Seyed Majid (Department of Soil Science, University of Tehran, Tehran, Iran ); Motesharezadeh, Babak (Department of Soil Science, University of Tehran, Tehran, Iran ); Hosseini, Hossein Mirseyed (Department of Soil Science, University of Tehran, Tehran, Iran ); Alikhani, Hoseinali (Department of Soil Science, University of Tehran, Tehran, Iran ); Zolfaghari, Ali Asghar (Faculty of Desert Studies, University of Semnan, Semnan, Iran );
  • 초록  

    Abstract Root induced changes are deemed to have an important role in the success of remediation techniques in contaminated soils. Here, the effects of two nano-particles [SiO 2 and zeolite] with an application rate of 200mgkg −1 , and two bacteria [ Bacillus safensis FO-036b(T) and Pseudomonas fluorescens p.f.169] in the rhizosphere of sunflower on Zn and Pb dynamics were studied in greenhouse conditions. The treatments reduced the exchangeable Zn (from 13.68% to 30.82%) and Pb (from 10.34% to 25.92%) in the rhizosphere compared to the control. The EC and microbial respiration/population of the rhizosphere and bulk soil had an opposite trend with the exchangeable fraction of Zn and Pb, but dissolved organic carbon followed a similar trend with the more bioavailable fractions. As a result, the accumulation of Pb and Zn in the plant tissues was significantly (p 2 NPs and bacteria to immobilize Pb and Zn in the soil, depending on the chemical character of the metals and the treatments. Generally, the affinity of the biotic treatment for Pb was more than the abiotic and conversely, the abiotic treatment showed a higher ability to immobilize Zn than the biotic treatment. Highlights Zeolite /SiO 2 NPs considerably reduce the available fraction of Zn and Pb than the bacteria. The affinity of the bacteria treatment for Pb is more than the zeolite/SiO 2 NPs. Zeolite/SiO 2 NPs have a higher ability to immobilize Zn than the bacteria treatment. EC and microbial respiration/population have an opposite trend with the available fraction. The soil DOC follows a similar trend with the more bioavailable fractions of Zn and Pb.


  • 주제어

    Rhizosphere .   Nano-particles .   Bacteria .   Zinc .   Lead.  

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