Habitat conditions and phenological tree traits overrule the influence of tree genotype in the needle mycobiome-Picea glauca system at an arctic treeline ecotone
Habitat conditions and phenological tree traits overrule the influence of tree genotype in the needle mycobiome-Picea glauca system at an arctic treeline ecotone
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DOI：
10.1111/nph.13988
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发表时间：
2016-09-01
期刊：
影响因子：
9.4
通讯作者：
Unterseher, Martin
中科院分区：
文献类型：
--
作者：
Eusemann, Pascal;Schnittler, Martin;Unterseher, Martin
极端生境中的植物相关真菌群落研究不足，了解甚少。我们分析了Illumina产生的ITS1序列，该序列来自美国阿拉斯加北方树线的白色云杉（Picea glauca）的针叶菌群。从用于树基因分型的相同DNA获得序列。本研究首次比较了真菌元卫星编码和树木微卫星数据。在一般情况下，相邻的树木共享更多的真菌类群比树木生长在更远的距离。真菌群落与物候宿主特征和当地的栖息地特征强烈相关，对比茂密的森林与开放的树线网站。树木之间的遗传相似性不影响真菌组成，针叶真菌群落与树木基因型之间不存在显著相关性。我们的研究结果表明，显着的影响，当地的栖息地条件和表型树性状的针叶栖息真菌。相比之下，树木的遗传特性不能作为针叶真菌群落的主要驱动力，至少在这种极端环境下，白色云杉不能。
Plant-associated mycobiomes in extreme habitats are understudied and poorly understood. We analysed Illumina-generated ITS1 sequences from the needle mycobiome of white spruce (Picea glauca) at the northern treeline in Alaska (USA). Sequences were obtained from the same DNA that was used for tree genotyping. In the present study, fungal metabarcoding and tree microsatellite data were compared for the first time. In general, neighbouring trees shared more fungal taxa with each other than trees growing in further distance. Mycobiomes correlated strongly with phenological host traits and local habitat characteristics contrasting a dense forest stand with an open treeline site. Genetic similarity between trees did not influence fungal composition and no significant correlation existed between needle mycobiome and tree genotype. Our results suggest the pronounced influence of local habitat conditions and phenotypic tree traits on needle-inhabiting fungi. By contrast, the tree genetic identity cannot be benchmarked as a dominant driver for needle-inhabiting mycobiomes, at least not for white spruce in this extreme environment.