Soil fungal networks maintain local dominance of ectomycorrhizal trees
Soil fungal networks maintain local dominance of ectomycorrhizal trees
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土壤真菌网络维持外生菌根树的局部优势
DOI：
10.1038/s41467-020-16507-y
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发表时间：
2020-05-26
影响因子：
16.6
通讯作者：
Liu, Xubing
中科院分区：
文献类型：
--
作者：
Liang, Minxia;Johnson, David;Liu, Xubing
调节物种丰富的森林中树木的群落组成和当地优势的机制还没有得到很好的解决，但与土壤微生物相互作用的重要性越来越受到认可。在这里，我们表明，树苗通过根相关的真菌菌丝与相邻的成年树下的土壤相互作用生长速度更快，并有更大的生存比从外部真菌菌丝体分离的幼苗，但观察到这些影响的物种拥有外生菌根（ECM），而不是丛枝菌根（AM）真菌。此外，自然再生的AM幼苗存活超过10年是负相关的周围同种植物的密度，而ECM树幼苗的存活显示出积极的密度依赖性在此期间，AM幼苗根含有更丰富的病原真菌比ECM幼苗根。我们的研究结果表明，邻里之间的相互作用介导的有益和致病的土壤真菌调节植物种群和群落结构在超多样性的森林。
The mechanisms regulating community composition and local dominance of trees in species-rich forests are poorly resolved, but the importance of interactions with soil microbes is increasingly acknowledged. Here, we show that tree seedlings that interact via root-associated fungal hyphae with soils beneath neighbouring adult trees grow faster and have greater survival than seedlings that are isolated from external fungal mycelia, but these effects are observed for species possessing ectomycorrhizas (ECM) and not arbuscular mycorrhizal (AM) fungi. Moreover, survival of naturally-regenerating AM seedlings over ten years is negatively related to the density of surrounding conspecific plants, while survival of ECM tree seedlings displays positive density dependence over this interval, and AM seedling roots contain greater abundance of pathogenic fungi than roots of ECM seedlings. Our findings show that neighbourhood interactions mediated by beneficial and pathogenic soil fungi regulate plant demography and community structure in hyperdiverse forests.