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Wheat yellow mosaic enhances bacterial deterministic processes in a plant-soil system.
Haoqing Zhang1, Chuanfa Wu1, Fangyan Wang1
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.
The Science of the Total Environment
|November 8, 2021
Summary
Wheat yellow mosaic (WYM) disease alters microbial community assembly in soil and plants. Deterministic processes increasingly shape bacterial communities with disease severity, impacting wheat health prediction.
Area of Science:
- Microbial ecology
- Plant pathology
- Soil science
Background:
- Understanding microbial community assembly across the soil-plant continuum is vital for predicting ecosystem responses to environmental change.
- The influence of plant health status on this microbial assembly remains poorly understood.
- Wheat yellow mosaic (WYM) is a significant soil-borne disease affecting winter wheat.
Purpose of the Study:
- To investigate the impact of WYM on microbial community assembly in soil (bulk and rhizosphere) and plant (roots and leaves) of winter wheat.
- To elucidate the ecological mechanisms driving these changes.
- To assess the potential of microbial assembly for predicting wheat disease.
Main Methods:
- Null model analysis was employed to study microbial community assembly.
- Random forest modeling was used to predict pathological conditions.
- Structural equation modeling analyzed correlations between disease, soil properties, and microbial processes.
Main Results:
- Bacterial communities were dominated by deterministic processes, while fungal communities were primarily stochastic.
- WYM intensified deterministic processes in bacterial assembly, reducing niche breadth.
- Increased soil total nitrogen (TN) and soil organic carbon (SOC), and inter-kingdom competition influenced bacterial assembly.
Conclusions:
- WYM significantly alters microbial community assembly across the soil-plant continuum, favoring deterministic processes in bacteria.
- Rhizosphere bacterial community assembly can predict wheat disease severity.
- Ecological mechanisms linking microbial communities, soil properties, and soil-borne diseases were revealed, emphasizing the importance of microbial assembly for plant and soil health.
