Defining a core microbial necrobiome associated with decomposing fungal necromass
Defining a core microbial necrobiome associated with decomposing fungal necromass
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定义与分解真菌坏死物相关的核心微生物坏死生物组
DOI：
10.1093/femsec/fiad098
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发表时间：
2023
影响因子：
4.2
通讯作者：
Kennedy, Peter G.
中科院分区：
文献类型：
--
作者：
Cantoran, Anahi;Maillard, François;Baldrian, Petr;Kennedy, Peter G.
尽管人们对真菌腐尸块分解越来越感兴趣，因为它在土壤碳保持中的重要性，但是否有一组一致的微生物与腐尸块分解有关仍未解决。在这里，我们从不同的真菌种类、地理位置、栖息地和孵化时间综合了细菌和真菌群落的组成。我们发现有一个细菌和真菌属的核心群体（即核心真菌necrobiome），尽管核心的具体大小取决于定义。基于包括微生物频率和丰度在内的度量，我们证明了核心在分类和功能上是多样化的，包括细菌共养菌和寡养菌，真菌腐养菌，外生菌根真菌，真菌和动物寄生虫。我们还发现，随着时间的推移，核心坏死性生物群落的组成明显是动态的，许多核心细菌和真菌属与坏死性组织分解的早期、中期或晚期有特定的关联。虽然本研究确定了核心真菌坏死群落的存在，但我们认为需要对热带环境和森林以外的其他陆地生物群落中真菌坏死团分解者群落的组成进行分析，以填补关于真菌坏死群落全球性质的关键知识空白。
Despite growing interest in fungal necromass decomposition due to its importance in soil carbon retention, whether a consistent group of microorganisms is associated with decomposing necromass remains unresolved. Here, we synthesize knowledge on the composition of the bacterial and fungal communities present on decomposing fungal necromass from a variety of fungal species, geographic locations, habitats, and incubation times. We found that there is a core group of both bacterial and fungal genera (i.e. a core fungal necrobiome), although the specific size of the core depended on definition. Based on a metric that included both microbial frequency and abundance, we demonstrate that the core is taxonomically and functionally diverse, including bacterial copiotrophs and oligotrophs as well as fungal saprotrophs, ectomycorrhizal fungi, and both fungal and animal parasites. We also show that the composition of the core necrobiome is notably dynamic over time, with many core bacterial and fungal genera having specific associations with the early, middle, or late stages of necromass decomposition. While this study establishes the existence of a core fungal necrobiome, we advocate that profiling the composition of fungal necromass decomposer communities in tropical environments and other terrestrial biomes beyond forests is needed to fill key knowledge gaps regarding the global nature of the fungal necrobiome.