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| Impacts of two kinds of arbuscular mycorrhizal fungi on rhizospheric bio-available Cd and accumulation of Cd for Pennisetum sp. |
| Received:July 03, 2016 |
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| KeyWord:Pennisetum sp.;arbuscular mycorrhizal fungi(AMF);Cd |
| Author Name | Affiliation | E-mail | | JI Peng-peng | School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China | | | YIN Guang-cai | School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China | gcyin@163.com | | CHEN Zhi-liang | South China Institute of Environmental Science, MEP, Guangzhou 510655, China | | | ZHOU Bing | GZ HNK Soil Remediation Technology CO., LTD, Guangzhou 511450, China | | | LIN Qin-tie | School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China | | | LIU Qian-jun | School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China | | | LIU De-ling | School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China | |
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| Abstract: |
| Pennisetum sp. was inoculated with two different types of arbuscular mycorrhizal fungi:Funneliformis mossea(Fm) and Rhizophagus intraradices(Ri). And the variations of the rhizospheric bio-available Cd, biomass and plant Cd accumulation were investigated. Four treatments of soil Cd contents(T0:the control, T1:5 mg·kg-1, T2:10 mg·kg-1 and T3:15 mg·kg-1) were carried out by pot experiment. It indicated that the inoculation had significantly decreased the bio-available Cd content. Compared with the control, the ion exchangeable Cd decreased by 18.65%, 20.51% and 6.53% at soil Cd contents of 5 mg·kg-1, 10 mg·kg-1 and 15 mg·kg-1, respectively. And the acidic dissoluble-Cd decreased correspondingly by 12.54%, 16.64% and 6.66% respectively. When treated by soil Cd contents of 10 mg·kg-1 and 15 mg·kg-1, the above-ground biomass of Pennisetum sp. increased by 20.98%, and 36.94% inoculated with Fm, and 36.54% and 43.88% inoculated with Ri, while the below-ground biomass increased by 14.31% and 21.79% inoculated with Fm, and 25.78% and 12.83% inoculated with Ri, respectively. As a result, no obviously variation was observed with the translocation factor(TF), but the inoculation of AMF had significantly increased the Cd accumulation in Pennisetum sp.. The bio-concentration factor(BCF) could reach 0.77 at soil Cd content of 5 mg·kg-1 after inoculating with Ri. |
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