Journal of Ecology and Rural Environment ›› 2017, Vol. 33 ›› Issue (6): 555-563.doi: 10.11934/j.issn.1673-4831.2017.06.010

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Influence of Arbuscular Mycorrhizal Fungi and Iron Oxide Magnetic Nanoparticles on Maize Growth and Fe-Uptake

CAO Ji-ling1,2,3, FENG You-zhi1,2, LIN Xian-gui1,2   

  1. 1. State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;
    2. Joint Open Laboratory of Soil and the Environment, Hong Kong Baptist University & Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;
    3. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-07-22 Online:2017-06-25 Published:2017-06-15

Abstract:

A greenhouse pot experiment was established to investigate the effects of Glomus caledonium on maize (Zea mays) plants under differential levels (0.1, 1.0, and 10.0 mg·kg-1) of nano-iron oxide magnetic nanoparticles (Fe3O4) artificially added soils. The results indicate that the high (10.0 mg·kg-1) application of nano-Fe3O4 significantly decreased (P<0.05) plant biomass of maize, root mycorrhizal colonization rate and plant N, P, Ca, Zn concentration, but significantly increased (P<0.05) shoot Fe concentration. Compared to the corresponding non-AM fungi-inoculated treatment, inoculating Glomus caledonium significantly increased (P<0.05) root Fe concentration and individual Fe acquisition of maize plants, but significantly decreased (P<0.05) shoot Fe concentration, that eventually significantly increased (P<0.05) plant biomass of maize with the high nano-Fe3O4 applied treatment. These results indicate that AM fungi could alleviate the toxicity of nano-Fe3O4 to plants by enhancing Fe partition in roots and reducing the translocation of Fe by maize plants.

Key words: nano-Fe3O4, Glomus caledonium, maize, Fe acquisitions

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