Plant-fungal interactions in hybrid zones: Ectomycorrhizal communities of willows (Salix) in an alpine glacier forefield
Plant-fungal interactions in hybrid zones: Ectomycorrhizal communities of willows (Salix) in an alpine glacier forefield
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DOI：
10.1016/j.funeco.2020.100936
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发表时间：
2020-06-01
期刊：
影响因子：
2.9
通讯作者：
Suz, L. M.
中科院分区：
文献类型：
--
作者：
Arraiano-Castilho, R.;Bidartondo, M., I;Suz, L. M.
外生菌根（EcM）真菌是欧洲阿尔卑斯山多年生木本植物的重要组成部分。从大陆到地方尺度，环境条件和植物寄主特性可以预测EcM群落结构和组成。然而，目前还不清楚是否EcM社区的同源宿主物种和它们的杂交种在当地规模的差异结构。本研究的目的是：（1）对瑞士柳（Salix helvetica）、紫花柳（Salix purpurea）及其杂种的外鞘细胞群落进行表征;（2）阐明影响杂种区外鞘细胞群落的非生物和生物因子。我们分析了与柳树在冰川流域的外生菌根真菌的分子鉴定相结合，从个人和土壤中。我们检测到不同的EcM真菌形成非模块化和非嵌套网络，但我们没有发现显着差异的整体EcM真菌群落丰富度或组成之间的亲本物种和杂交种。然而，个别真菌不同的主机偏好。我们的研究结果表明，在一个亚高山混合区与异质地貌，主机基因型是不是一个强有力的预测整体EcM真菌群落，但它影响特定真菌的发生。(C)2020 Elsevier Ltd和英国真菌学会。All rights reserved.
Ectomycorrhizal (EcM) fungi are essential for the establishment of woody perennial plants in the European Alps. From continental to local scales, environmental conditions and plant host characteristics can predict EcM community structure and composition. However, it is unclear whether EcM communities of congeneric host species and their hybrids are differentially structured at local scales. We aimed to i) characterize EcM communities of Salix helvetica, Salix purpurea and their hybrids and ii) elucidate the abiotic and biotic factors affecting EcM communities in hybrid zones. We analysed the EcM communities associated with willows in a glacier valley by combining molecular identification of fungi from individual ectomycorrhizas and from soil. We detected diverse EcM fungi forming non-modular and unnested networks, but we did not find significant differences in the overall EcM fungal community richness or composition among parental species and hybrids. Nevertheless, individual fungi differed regarding host preference. Our results demonstrate that in a sub-alpine hybrid zone with heterogeneous geomorphology, host genotype was not a strong predictor of overall EcM fungal community, but it influenced the occurrence of particular fungi. (C) 2020 Elsevier Ltd and British Mycological Society. All rights reserved.