Cardiff School of Biosciences, Cardiff University, Museum Avenue, Cardiff. CF10 3AX. Wales, UK.
FEMS Microbiol Ecol. 2019 Feb 1;95(2). doi: 10.1093/femsec/fiy225.
The bacterial communities in decomposing wood are receiving increased attention, but their interactions with wood-decay fungi are poorly understood. This is the first field study to test the hypothesis that fungi are responsible for driving bacterial communities in beech wood (Fagus sylvatica). A meta-genetic approach was used to characterise bacterial and fungal communities in wood that had been laboratory-colonised with known wood-decay fungi, and left for a year at six woodland sites. Alpha-, Beta- and Gammaproteobacteria and Acidobacteria were the proportionally dominant bacterial taxa, as in previous studies. Pre-colonising wood with decay fungi had a clear effect on the bacterial community, apparently via direct fungal influence; the bacterial and fungal communities present at the time of collection explained nearly 60% of their mutual covariance. Site was less important than fungal influence in determining bacterial communities, but the effects of pre-colonisation were more pronounced at some sites than at others. Wood pH was also a strong bacterial predictor, but was itself under considerable fungal influence. Burkholderiaceae and Acidobacteriaceae showed directional responses against the trend of the bacterial community as a whole.
在分解木材的细菌群落受到越来越多的关注，但它们与木材腐朽真菌的相互作用还知之甚少。这是第一个野外研究来检验真菌是负责驱动山毛榉木（欧洲山毛榉）中细菌群落的假说。采用宏基因组学方法来描述在实验室中用已知的木材腐朽真菌定殖，并在六个林地地点放置一年的木材中的细菌和真菌群落。与之前的研究一样，α-、β-和γ-变形菌门和酸杆菌门是比例上占优势的细菌类群。在腐朽真菌定殖之前的木材显然会直接受到真菌的影响，从而对细菌群落产生明显的影响；收集时存在的细菌和真菌群落解释了它们相互协方差的近 60%。在确定细菌群落方面，地点不如真菌的影响重要，但在某些地点比在其他地点的定殖影响更为显著。木材 pH 值也是细菌的一个强有力的预测因子，但它本身也受到真菌的强烈影响。伯克霍尔德氏菌科和酸杆菌科表现出与整个细菌群落趋势相反的定向反应。
