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Plant-microorganism-soil interaction under long-term low-dose ionizing radiation
Guoqiang Zeng1,2, Yingzi Wen1, Chuyang Luo1
1College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu, China.
Frontiers in Microbiology
|January 26, 2024
Summary
Long-term low-dose ionizing radiation (LLR) impacts plant-microorganism-soil systems by altering carbon and nitrogen cycling. Symbiotic microbes play a key role in this response, adapting to increased radiation levels.
Area of Science:
- Environmental Science
- Radiation Biology
- Soil Ecology
Background:
- Environmental nuclear radiation pollution is increasing, affecting ecosystems.
- Understanding plant-microorganism-soil system responses to long-term low-dose ionizing radiation (LLR) is crucial but unclear.
Purpose of the Study:
- Investigate the regulatory mechanisms of plant-microorganism-soil systems under LLR.
- Analyze the impact of LLR on carbon and nitrogen migration.
- Examine adaptive changes in plant functional traits.
Main Methods:
- Studied a plant-microorganism-soil system with 10 years of stable LLR exposure.
- Assessed responses based on absorbed dose rate decay with distance.
- Analyzed microbial community composition, soil enzyme activity, and soil carbon/nitrogen content.
Main Results:
- LLR significantly affects carbon and nitrogen migration via the "symbiotic microbial effect."
- Increased radiation intensity correlated with higher abundance of symbiotic fungi (Ectomycorrhizal, Rhizobiales).
- Elevated radiation led to increased soil lignin peroxidase activity, C/N ratio, and soil carbon percentage.
Conclusions:
- The "symbiotic microbial effect" is a critical mechanism in terrestrial ecosystems responding to LLR.
- LLR induces adaptive changes in both microbial communities and plant functional traits.
- This research provides insights into ecosystem resilience under chronic radiation stress.
Keywords:
adaptation to nuclear radiationlong-term low-dose ionizing radiationplant–microorganism–soil interactionsymbiotic microbial effectunderground carbon and nitrogen cycleMore Related Videos
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