Bacterial Community Selection of Russula griseocarnosa Mycosphere Soil

Summary

This research investigated the relationship between soil bacteria and an economically valuable wild mushroom (Russula griseocarnosa) that cannot be artificially cultivated. The study found that specific bacterial communities and soil conditions are essential for the mushroom’s growth. This has important real-world implications: • Better understanding of these relationships could help develop methods to cultivate this valuable mushroom species • The findings can guide conservation efforts to protect natural habitats where these mushrooms grow • Knowledge of beneficial bacteria could lead to development of specialized fertilizers to promote mushroom growth • The research provides insights into sustainable harvesting practices for wild mushrooms • The findings contribute to understanding complex ecological relationships in forest soils

Background

Russula griseocarnosa is a wild, ectomycorrhizal, edible, and medicinal fungus with high economic value in southern China. Its fruiting bodies cannot be artificially cultivated. Understanding the effects of abiotic and biotic factors on R. griseocarnosa growth is important for its conservation and cultivation.

Objective

To explore the characteristics of soil bacteria related to the growth of R. griseocarnosa by comparing the diversity, community structure, and functional profiles of bacteria in the mycosphere and bulk soil across different geographical locations.

Results

The diversity of soil bacteria decreased in R. griseocarnosa mycosphere compared to bulk soil. Soil pH and available nitrogen were identified as major factors influencing mycosphere bacterial communities. Key bacterial genera including Burkholderia-Paraburkholderia, Mycobacterium, Roseiarcus, Sorangium, Acidobacterium, and Singulisphaera were significantly enriched in mycosphere soil. Functional traits related to two-component systems, bacterial secretion, tyrosine metabolism, fatty acid biosynthesis, and vitamin metabolism were more abundant in mycosphere soil.

Conclusion

The study identified suitable environmental conditions and key bacterial communities associated with R. griseocarnosa growth. Multiple symbiotic relationships between microbes and R. griseocarnosa appear to decrease bacterial diversity. Application of nitrogen fertilizer and microbial fertilizers containing mycorrhiza helper bacteria may promote conservation and sustainable utilization of R. griseocarnosa.
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