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Effects of magnetic iron oxide nanoparticles on structure and function of fungal community in maize rhizosphere soil *(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

2020 02
Research Field:
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Effects of magnetic iron oxide nanoparticles on structure and function of fungal community in maize rhizosphere soil *
CAO Jiling12 FENG Youzhi2 & LIN Xiangui 2**
1 School of Geographical Sciences, Fujian Normal University , Fuzhou 350007, China
2 State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing Jiangsu 210008, China
magnetic iron oxide nanoparticles high-throughput sequencing FUNGuild fungal community structure ecological function

Objectives: The inevitable release of nanoparticles into agricultural field with the wide application of nano-products may pose risks to agricultural ecosystem . Soil fungi play key roles in soil nutrient cycling, health and plant productivity, but their responses to nanoparticles remain equivocal. The objective of this investigation was to figure out the influences of magnetic iron oxide nanoparticles on soil fungal community and function . Methods: In this study, a pot experiment was established to investigate the responses of soil fungal assemblages to different application level of magnetic iron oxide nanoparticles (nano Fe 3O4) (0.1, 1.0, 10.0 mg/kg), as well as their counterparts, bulk Fe3O4 particles, using Illumina sequencing analysis method. Meantime, FUNGuild were performed to investigate the influence of nano Fe 3O4 on soil fungal function groups. Results: The sequencing data reveled that neither bulk Fe3O4 nor nano Fe3O4 exerted a significant influence on soil fungal diversity. However, nano Fe3O4 at 10.0 mg/ kg greatly (p < 0.05) shifted the fungal community composition, showing as significant decrease in the relative abundances of Talarmyces, Fusarium, Cryptococcu and Mortierella. In addition, based on FUNGuild analysis, lower proportion of saprotroph and higher relative abundances of pathotroph and symbiotroph fungi were identified in soils amended with 10.0 mg/kg nano Fe3O4 in comparison to control. Conclusions: The nano Fe 3O4 at high concentration would cause negative influences on soil fungal community structure and saprotroph fungi but may potentially increase the pathotroph fungi, which may go against plant growth and soil fertility. These findings are of great help towards building a comprehensive understanding of the potential impact of nanoparticles on the agricultural ecosystem.




Last Update: 2019-07-30