The Role of Metal Nanoparticles in Influencing Arbuscular Mycorrhizal Fungi Effects on Plant Growth
文献类型： 外文期刊
作者： Feng, Youzhi 1 ; Cui, Xiangchao 1 ; He, Shiying 2 ; Dong, Ge 3 ; Chen, Min 1 ; Wang, Junhua 1 ; Lin, Xiangui 1 ;
作者机构： 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China
2.Jiangsu Acad Agr Sci, Insititute Agr Resources & Environm, Nanjing 210014, Jiangsu, Peoples R China
3.Southeast Univ, Sch Biol Sci & Med Engn, Nanjing 210096, Jiangsu, Peoples R China
期刊名称：ENVIRONMENTAL SCIENCE & TECHNOLOGY （ 影响因子：9.028； 五年影响因子：9.922 ）
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收录情况： SCI
摘要： A knowledge gap still remains concerning the in situ influences of nanoparticles on plant systems, partly due to the absence of soil microorganisms. Arbuscular mycorrhizal fungi (AMF) can form a mutualistic symbiosis with the roots of over 90% of land plants. This investigation sought to reveal the responses of mycorrhizal clover (Trifolium repens) to silver nanoparticles (AgNPs) and iron oxide nanoparticles (FeONPs) along a concentration gradient of each. FeONPs at 3.2 mg/kg significantly reduced mycorrhizal clover biomass by 34% by significantly reducing the glomalin content and root nutrient acquisition of AMF. In contrast, no negative effects of AgNPs at concentrations over 0.1 mg/kg were observed; however, AgNPs at 0.01 mg/kg inhibited mycorrhizal clover growth. In response to the elevated AgNPs content, the ability of AMF to alleviate AgNPs stress (via increased growth and ecological behaviors) was enhanced, which decreased Ag content and the activities of antioxidant enzymes in plants. These results were further supported by X-ray microcomputed tomography. Our findings suggest that in soil ecosystem, the influence of nanometals on plant systems would be more complicated than expected, and more attention should be focused on plant responses in combination with those of soil microorganisms.
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