Ecological Research

, Volume 23, Issue 6, pp 983–993

Monotropastrum humile var. humile is associated with diverse ectomycorrhizal Russulaceae fungi in Japanese forests

Authors

    • Faculty of AgricultureShinshu University
  • Daisei Kitamura
    • Faculty of AgricultureShinshu University
  • Masanobu Setoguchi
    • Faculty of AgricultureShinshu University
  • Yosuke Matsuda
    • Graduate School of BioresourcesMie University
  • Yasushi Hashimoto
    • Obihiro University of Agriculture and Veterinary Medicine
  • Norihisa Matsushita
    • Graduate School of Agriculture and Life ScienceUniversity of Tokyo
  • Masaki Fukuda
    • Faculty of AgricultureShinshu University
Original Article

DOI: 10.1007/s11284-008-0463-7

Cite this article as:
Yamada, A., Kitamura, D., Setoguchi, M. et al. Ecol Res (2008) 23: 983. doi:10.1007/s11284-008-0463-7

Abstract

Monotropastrum humile is nearly lacking in chlorophyll and obtains its nutrients, including carbon sources, from associated mycorrhizal fungi. We analyzed the mycorrhizal fungal affinity and species diversity of M. humile var. humile mycorrhizae to clarify how the plant population survives in Japanese forest ecosystems. We classified 78 samples of adult M. humile var. humile individuals from Hokkaido, Honshu, and Kyusyu Islands into 37 root mycorrhizal morphotypes. Of these, we identified 24 types as Russula or Lactarius fungal taxa in the Russulaceae, Basidiomycetes, but we could not identify the remaining 13 types as to their genus in the Basidiomycetes. The number of fungal species on M. humile var. humile was the highest in the plant subfamily. The diversity of fungal species revealed its increased trends in natural forests at the stand level, fagaceous vegetation, and cool-temperate climate. The most frequently observed fungus colonized mainly samples collected from sub-alpine forests; the second most frequently observed fungus colonized samples collected from sub-alpine to warm-temperate forests. These results suggest that Japanese M. humile populations are associated with specific but diverse fungi that are common ectomycorrhizal symbionts of various forest canopy trees, indicating a tripartite mycorrhizal relationship in the forest ecosystem.

Keywords

Ectomycorrhizal symbiosisFungal species diversityMyco-heterotrophyNon-photosynthetic plantsTripartite relationship

Copyright information

© The Ecological Society of Japan 2008