| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
In subalpine conifer forests and temperate broadleaf forests, we investigated the existence and degree of mycoheterotrophy (carbon dependence on root colonizing fungi) among a variety of forest floor plants by analyzing natural abundance of C and N stable isotopes. Root colonizing fungal communities and photosynthetic traits of putative partially mycoheterotrophic plants were also studied. Many species belonging to Orchidaceae and Pyroleae (Ericaceae) were confirmed as fully or partially mycoheterotrophic plants. While the orchid species tended to prefer a certain fungal group, Pyroleae species were colonized by a diverse ectomycorrhizal fungi without apparent specificity. Photosynthetic traits and mycoheterotrophic traits were significantly different among coexisting Pyroleae species, suggesting their niche differentiation.
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