Structural diversity across arbuscular mycorrhizal, ectomycorrhizal, and endophytic plant-fungus networks

• 東樹, 宏和

• 佐藤, 博俊

• 山本, 哲史

• 田邉, 晶史

抄録

Background: Below-ground linkage between plant and fungal communities is one of the major drivers of terrestrial ecosystem dynamics. However, we still have limited knowledge of how such plant-fungus associations vary in their community-scale properties depending on fungal functional groups and geographic locations. Methods: By compiling a high-throughput sequencing dataset of root-associated fungi in eight forests along the Japanese Archipelago, we performed a comparative analysis of arbuscular mycorrhizal, ectomycorrhizal, and saprotrophic/endophytic associations across a latitudinal gradient from cool-temperate to subtropical regions. Results: In most of the plant-fungus networks analyzed, host-symbiont associations were significantly specialized but lacked "nested" architecture, which has been commonly reported in plant-pollinator and plant-seed disperser networks. In particular, the entire networks involving all functional groups of plants and fungi and partial networks consisting of ectomycorrhizal plant and fungal species/taxa displayed "anti-nested" architecture (i.e., negative nestedness scores) in many of the forests examined. Our data also suggested that geographic factors affected the organization of plant-fungus network structure. For example, the southernmost subtropical site analyzed in this study displayed lower network-level specificity of host-symbiont associations and higher (but still low) nestedness than northern localities. Conclusions: Our comparative analyses suggest that arbuscular mycorrhizal, ectomycorrhizal, and saprotrophic/endophytic plant-fungus associations often lack nested network architecture, while those associations can vary, to some extent, in their community-scale properties along a latitudinal gradient. Overall, this study provides a basis for future studies that will examine how different types of plant-fungus associations collectively structure terrestrial ecosystems.

収録刊行物

• BMC Plant Biology

  BMC Plant Biology 18 2018-11-21

  Springer Nature America, Inc

キーワード

• Biodiversity
• Community ecology
• Competitive exclusion
• Host specificity or preference
• Latitudinal gradients
• Microbiomes
• Plant-fungus interactions
• Plant-soil feedback
• Species coexistence
• Mycorrhizal and endophytic symbiosis

詳細情報

• CRID: 1050845763139235584
• NII論文ID: 120006545194
• ISSN: 14712229
• HANDLE: 2433/235716
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles