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Waterlogging-induced restructuring of phyllosphere microbiota associated with mycotoxin accumulation
Yufan Lin1, Xin Wang1, Danyang Zhao1
1College of Grassland Science and Technology, China Agricultural University, Beijing 100091, China.
Ecotoxicology and Environmental Safety
|August 10, 2025
Summary
Waterlogging significantly alters maize phyllosphere microbes, increasing fungal pathogens and mycotoxin risks, especially in ear tissues. This highlights tissue-specific microbial responses to environmental stress.
Area of Science:
- Plant Science
- Microbiology
- Environmental Science
Background:
- Waterlogging events are increasing, impacting plant health and ecosystems.
- Understanding phyllosphere microbial responses to waterlogging is crucial but limited.
Purpose of the Study:
- To investigate the effects of waterlogging on maize phyllosphere microbial diversity and function.
- To analyze tissue-specific responses in maize leaves and ears.
Main Methods:
- Metagenomic sequencing was employed to assess microbial communities.
- Analysis focused on microbial diversity, interaction networks, and functional gene abundance.
Main Results:
- Waterlogging significantly altered microbial communities and interaction networks.
- Upregulated oxidative stress and signaling pathways were observed, particularly in ear fungi.
- Genes related to mycotoxin production increased, leading to higher mycotoxin levels in ears.
Conclusions:
- Waterlogging poses a risk of increased mycotoxin contamination in maize.
- Maize phyllosphere microbial communities exhibit distinct tissue-specific responses to waterlogging stress.
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