与木菌相关的细菌群体使用不同的分解机制
Irshad Ul Haq1,2, Benjamin Hillmann3, Molly Moran1
1Department of Plant and Microbial Biology, College of Biological Sciences, University of Minnesota, St. Paul, MN, USA.
ISME communications
|November 8, 2023
概括
木材腐烂类型显著影响着腐烂的树木中的细菌群体. 白色腐烂真菌为Firmicutes丰富,而棕色腐烂真菌更喜欢特定的蛋白质细菌,突出显示真菌对微生物多样性的影响.
科学领域:
- 菌类学 菌类学是指菌类学.
- 微生物生态学 微生物生态学
- 生物地质化学生物地质化学
背景情况:
- 木材分解涉及的真菌通过不同的机制降解纤维素:棕色腐烂 (纤维素/半纤维素) 和白色腐烂 (所有成分).
- 类型的腐烂会影响木质生物质中碳的命运,但它对相关细菌群落的影响仍然不太清楚.
- 了解这些相互作用对于理解营养循环和森林生态系统动态至关重要.
研究的目的:
- 为了研究不同类型的木质腐烂 (棕色腐烂与白色腐烂) 如何塑造腐烂木材中的细菌群落的组成.
- 为了比较与特定的白色腐烂 (Fomes fomentarius) 和棕色腐烂 (Fomitopsis betulina) 相关的细菌社区,在共享宿主树种 (白) 上的真菌.
- 为了将细菌群体结构与腐烂类型的化学指标相关联,例如pH和素含量.
主要方法:
- 从Fomes fomentarius (白色腐烂) 和Fomitopsis betulina (棕色腐烂) 的脊髓体下面的木材样本的采集.
- 使用DNA测序 (amplicon序列变异 - ASVs) 来量化细菌群落.
- 测量化学特征,包括pH值和素去除,以鉴定腐烂类型.
主要成果:
- 白色和棕色腐烂木材中的细菌群体主要由蛋白质细菌组成.
- 在较少的细菌种群中观察到显著的差异,与腐烂类型相关.
- 白色腐烂木材显示富含Firmicutes,而棕色腐烂木材显示富含特定的Alphaproteobacteria,Actinobacteria和Acidobacteria,特别是在较低的pH值.
结论:
- 由真菌使用的木质腐烂策略对相关的细菌群体施加选择性压力,特别是对较少丰富的种类.
- 细菌群体的组成受到真菌腐烂的类型的显著影响,这表明真菌和细菌之间存在互惠关系.
- 这些发现强调了在研究森林生态系统中的微生物生态学时考虑真菌腐烂机制的重要性,以及低丰度种群被忽视的作用.
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