Combining Microfluidics and RNA-Sequencing to Assess the Inducible Defensome of a Mushroom Against Nematodes
- Author: mycolabadmin
- 2019-03-25
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Summary
This research reveals how mushrooms defend themselves against tiny worm predators using specialized toxic proteins. Using an innovative microfluidic device, scientists discovered new defense mechanisms that fungi employ when attacked by nematodes. This has important implications for everyday life:
• Better understanding of natural pest control mechanisms could lead to more sustainable agricultural practices
• The discovery of new toxic proteins could inspire development of novel pest control agents
• The research demonstrates how organisms adapt and defend themselves in nature, showing the complexity of ecological relationships
• The findings could help in developing new strategies to protect beneficial fungi in agriculture and medicine
• The innovative microfluidic technology developed could be applied to study other microscopic interactions in medicine and biotechnology
Background
Fungi are an attractive source of nutrients for predators. As part of their defense, some fungi can induce the production of anti-predator protein toxins in response to predation. Previous studies showed that this fungal defense response is most pronounced in areas of direct contact with nematodes, suggesting the need for an experimental setup that maximizes the interaction zone between fungal mycelium and nematodes for comprehensive characterization.
Objective
To determine the complete set of genes (defensome) that are differentially expressed when the model mushroom Coprinopsis cinerea is challenged by the fungivorous nematode Aphelenchus avenae, using a novel microfluidic device setup that maximizes their interaction.
Results
The study identified 1,229 differentially expressed genes compared to only 37 found in previous agar plate-based studies. One of the most highly upregulated genes (P450139) showed structural homology to bacterial pore-forming toxins and demonstrated strong toxicity against various bacterivorous nematodes. Analysis of bacteria associated with A. avenae revealed Proteobacteria and Bacteroidetes as the dominant phyla, similar to bacterivorous and plant-feeding nematodes.
Conclusion
The microfluidic setup significantly improved sensitivity in analyzing fungal defense responses compared to standard agar-based confrontations. The study revealed that nematode predation of fungi involves a tripartite rather than bipartite interaction due to nematode-associated bacteria. The newly identified protein P450139 represents a novel type of fungal defense protein against nematodes, suggesting complementary specificities of various nematotoxins ensuring efficient defense against different predators.
- Published in:BMC Genomics,
- Study Type:Laboratory Research,
- Source: 10.1186/s12864-019-5607-3