New soil bacterium found that kills crop fungus survival pods
Shie ZH, Chang HX
Soil Health
The white mold that ruins bean, canola, and sunflower harvests survives for years underground in tough little pods, and this newly discovered bacterium tunnels into those pods and kills them, hinting at a future biological alternative to fungicide sprays.
A nasty plant disease called white mold survives in soil for years inside hard little seed-like structures called sclerotia, waiting to reinfect crops. Researchers found that flooding the soil lets certain bacteria swarm and kill these survival pods, and they identified one brand-new bacterium species that's especially good at burrowing to the pod's core and finishing it off. This could lead to a natural, soil-based way to knock out the disease before it ever infects a plant.
Key Findings
Flooded soil conditions enriched bacteria like Massilia and Trinickia, which correlated with increased death of Sclerotinia sclerotiorum sclerotia (survival pods of white mold).
A 12-member synthetic bacterial community was built and tested; using spatial imaging (10x Genomics Xenium), researchers tracked which bacteria physically penetrated deepest into the sclerotia over time.
One strain, newly identified as Trinickia sclerotiorum sp. nov. (strain MC), reached the sclerotia's interior most effectively, showed the strongest antifungal activity in four separate assays, and was confirmed as a genetically distinct new species.
chevron_right Technical Summary
Scientists discovered a new soil bacterium species that hunts down and kills the survival structures of a major crop-destroying fungus, offering a potential natural biocontrol tool for farmers battling this disease.
Abstract Preview
Original paper
Spatial microbiome and synthetic community analyses reveal Trinickia sclerotiorum sp. nov. promotes sclerotia mortality of Sclerotinia sclerotiorum.
Bulk microbiome analysis obscures the spatial heterogeneity of microbial communities, limiting the understanding of bacterial distribution inside fungal sclerotia, which are the survival structures...
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Crop-improvement refers to the systematic enhancement of plant varieties through selective breeding, genetic modification, and biotechnological approaches to develop cultivars with superior agronomic, nutritional, or environmental traits. This field is essential for addressing global food security,
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