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Related Experiment Video

Updated: Aug 6, 2025

Production of Arbuscular Mycorrhizal (AM) Fungal Inoculum and Phenotypic Evaluation of Rice and AM Symbiosis Under Saline Conditions
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Long-term fertilization suppresses rice pathogens by microbial volatile compounds.

Yuqin Liang1, Liang Wei2, Shuang Wang2

  • 1State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Plant Virology, Ningbo University, Ningbo, 315211, China; Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo, 315211, China; Key Laboratory of Agro-Ecological Processes in Subtropical Region & Changsha Research Station for Agricultural and Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan, 410125, China; University of Chinese Academy of Sciences, Beijing, 100049, China.

Journal of Environmental Management
|March 16, 2023
PubMed
Summary

Mineral fertilization impacts soil microbes, altering microbial volatile organic compounds (VOCs) to suppress rice pathogens like Pyricularia oryzae and Rhizoctonia solani. This study reveals how different fertilization strategies influence VOCs for pathogen control.

Keywords:
FertilizationPlant pathogensPyricularia oryzaeRhizoctonia solaniSoil microbial communityVolatile organic compounds

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Area of Science:

  • Agricultural Science
  • Soil Microbiology
  • Plant Pathology

Background:

  • Microbial volatile organic compounds (VOCs) are known to suppress plant pathogens.
  • Fertilization significantly alters soil microbial communities, but its effect on VOC-mediated pathogen suppression is unclear.
  • Understanding this relationship is crucial for developing sustainable agricultural practices.

Purpose of the Study:

  • To investigate the impact of long-term fertilization treatments on microbial VOCs emitted from paddy soil.
  • To assess the efficacy of these VOCs in suppressing the in vitro growth of fungal rice pathogens, Pyricularia oryzae and Rhizoctonia solani.
  • To identify specific VOCs and soil microbial communities associated with enhanced pathogen suppression.

Main Methods:

  • Soil samples from a 30-year-old paddy field experiment with different fertilization regimes (control, NPK, NPK+straw, NPK+manure) were used.
  • Laboratory experiments exposed rice pathogens to VOCs emitted from soils without direct contact.
  • Pathogen growth inhibition was measured, and VOC profiles and soil microbial communities were analyzed.

Main Results:

  • VOCs from all tested soils significantly reduced mycelial biomass of P. oryzae (36-51%) and R. solani (10-30%) compared to a no-VOC control.
  • Mineral fertilization (NPK) and NPK with straw (NPK+S) treatments resulted in the highest pathogen suppression.
  • These effective soils emitted higher levels of quinones, phenols, and low alcohols, linked to specific bacterial and fungal populations.

Conclusions:

  • Long-term mineral fertilization influences soil microbial communities and their VOC emissions.
  • Specific VOCs, such as quinones and phenols, emitted from NPK and NPK+S fertilized soils contribute to the suppression of P. oryzae and R. solani.
  • Fertilization strategies can be optimized to enhance beneficial microbial VOCs for integrated pest management in rice cultivation.