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| Effects of Arbuscular Mycorrhizal Fungi on Cadmium Tolerance and Rhizospheric Fixation of Rice |
| Received:March 27, 2014 |
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| KeyWord:Glomus mosseae;Glomus intraradices;rice;cadmium stress;rhizospheric immobilization |
| Author Name | Affiliation | | WANG Li | State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China | | AN Guang-nan | State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China | | MA Fang | State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China | | WU Jie-ting | State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China | | ZHANG Xue | State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China | | WANG Min | State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China |
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| Abstract: |
| Arbuscular mycorrhizal fungi(AMF) have showed to improve plant resistance to and reduce translocation of heavy metals. Here we investigated the effects of Glomus mosseae(GM) and Glomus intraradices(GI) on the growth and physiological processes of paddy rice(Oryza sativa L.) grown in soil spiked with 0, 0.5, 1.0, 2.0 and 5.0 mg Cd·kg-1. Mycorrhizal inoculation significantly alleviated the inhibition of rice growth caused by Cd stress. Plant height increased by 13.8%(GM) and 10.3%(GI) compared to the control; Inoculating AMF also relieved the inhibitory effect of Cd on rice photosynthesis. At the highest concentration of Cd in this experiment(5.0 mg·kg-1), the content of malondialdehyde(MDA) decreased significantly while superoxide dismutase(SOD) activity and proline(Pro) concentration increased remarkbly(P<0.05). Compared with the control, AMF inoculation promoted the Cd immobilization in roots and prevented the Cd transfer from roots to aboveground parts. Bioconcentration factor(BCF) and translocation factor(TF) were both lower in GM and GI treatments than those in the control, implying that AMF could reduce Cd influence on aboveground part of paddy rice. |
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