Ectomycorrhizal fungi at northernmost treelines in northeastern Siberia: inoculum potentials contributing to the northern expansion of tree distributions

• Project/Area Number: 17K15281
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Forest science
• Research Institution: Hokkaido University
• Principal Investigator: Miyamoto Yumiko 北海道大学, 北極域研究センター, 博士研究員 (50770632)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 気候変動 / 菌根共生 / 北東シベリア / 埋土胞子 / タイガ林 / ツンドラ / ヌメリイグチ属 / ショウロ属 / 東シベリア

Outline of Final Research Achievements

Northernmost treelines in the Arctic regions are expected to expand into tundra under climate warming. I investigated ectomycorrhizal (EM) fungal species that may contribute to the northern expansion of larch trees (Larix cajanderi) in northeastern Siberia. Ectomycorrhizal fungal compositions were determined for mature trees and dormant spores in the soils. I found that Larix-specific EM fungi (Suillus and Rhizopogon) occurred at high frequencies on roots from mature trees. These fungal species were found in the bioassay experiments from tundra soils, indicating that dormant spores exist in tundra where currently no larch trees are present.

Academic Significance and Societal Importance of the Research Achievements

本研究では東シベリア広域のカラマツ林において現地調査を行った。結果、カラマツには宿主特異的なショウロ属やヌメリイグチ属が高い頻度で共生していることが明らかとなった。特にカラマツショウロ（Rhizopogon laricinus）は世界で初めてカラマツに共生するショウロ属の一種として新種記載され、学術的意義が高い。菌根菌は養水分吸収促進などの樹木の成長に重要な役割を持つ。温暖化によりカラマツが分布域を拡大する際には、宿主特異的な菌根菌との共生が重要であると考えられる。

Research Products

• [Int'l Joint Research] Instit. Biolog. Prob.Cryolith., SB RAS/North-Eastern Federal University(ロシア連邦)
• [Int'l Joint Research] Instit. Biolog. Prob.Cryolith., SB RAS/North-Eastern Federal University(ロシア連邦)
• [Int'l Joint Research] ロシア科学アカデミー北方圏生物問題研究所/北東連邦大学(ロシア連邦)
• [Journal Article] Discovery of Rhizopogon assocated with Larix from northeastern Siberia: insights into host shift of ectomycorrhizal fungi (2019)
  • Author(s): Miyamoto Y, Maximov TC, Sugimoto A, Nara K
  • Journal Title: Mycoscience Volume: 60 Issue: 5 Pages: 274-280
  • DOI: 10.1016/j.myc.2019.03.003
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Discovery of Rhizopogon associated with Larix from northeastern Siberia: Insights into host shift of ectomycorrhizal fungi (2019)
  • Author(s): Yumiko Miyamoto, Trofim C. Maximov, Atsuko Sugimoto, Kazuhide Nara
  • Journal Title: Mycoscience Volume: 印刷中
  • NAID: 40022012795
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Temperature niche position and breadth of ectomycorrhizal fungi: Reduced diversity under warming predicted by a nested community structure (2018)
  • Author(s): Miyamoto Yumiko、Terashima Yoshie、Nara Kazuhide
  • Journal Title: Global Change Biology Volume: 24 Issue: 12 Pages: 5724-5737
  • DOI: 10.1111/gcb.14446
  • Peer Reviewed
• [Journal Article] Effects of climate, distance, and a geographic barrier on ectomycorrhizal fugal communities in Japan: A comparison across Blakiston's Line (2018)
  • Author(s): Miyamoto, Y., Narimatsu,M., Nara, K.
  • Journal Title: Fungal Ecology Volume: 33 Pages: 125-133
  • DOI: 10.1016/j.funeco.2018.01.007
  • Peer Reviewed
• [Presentation] 北極圏森林境界の菌根宿主選択性 (2020)
  • Author(s): Miyamoto Y, Maximov T, Sugimoto A.
  • Organizer: 第131回日本森林学会大会
• [Presentation] Soil respiration responses to temperature and moisture in a taiga forest of eastern Siberia (2019)
  • Author(s): Miyamoto Y, Sato H, Sugimoto A, Maximov T, Kononov A.
  • Organizer: Xth International Symposium on C/H2O/Energy balance and climate over boreal and arctic regions with special emphasis on eastern Eurasia, and Sustainable Development of the North
  • Int'l Joint Research
• [Presentation] 北東シベリア森林北限におけるカラマツ外生菌根菌の埋土胞子群集 (2019)
  • Author(s): 宮本裕美子・Maximov Trofim・杉本 敦子
  • Organizer: 菌根研究会2019年度大会
• [Presentation] 気候変動と土壌微生物の種多様性 (2019)
  • Author(s): 宮本裕美子
  • Organizer: 第66回日本生態学会大会
  • Invited
• [Presentation] 東シベリア永久凍土上のダフリアカラマツ外生菌根菌群集と宿主特異性 (2019)
  • Author(s): 宮本 裕美子、Kononov Alexander、Maximov Trofim、杉本 敦子
  • Organizer: 第130回日本森林学会大会
• [Presentation] Climatic factors influencing soil respiration fluxes in a taiga forest of northeastern Siberia, revealed by 9 years of field measurements (2018)
  • Author(s): Miyamoto Yumiko, Kononov Alexander, Maximov Trofim, Sato Hisashi, Sugimoto Atsuko
  • Organizer: Japan Geoscience Union Meeting 2018
  • Int'l Joint Research
• [Presentation] Potential impact of permafrost thaw on carbon dynamics in forest soils projected by a vertically stratified process-based model (2018)
  • Author(s): Miyamoto, Y., Sato, H., Kononov, A., Sugimoto, A., Maximov, T.
  • Organizer: International Conference on Cryopedology
  • Int'l Joint Research
• [Presentation] Estimating carbon stock and greenhouse gas emissions from forest soils in the permafrost regions of northeastern Siberia (2017)
  • Author(s): Miyamoto, Y., Sato, H., Kononov, A., Sugimoto, A., Maximov, T.
  • Organizer: JpGU-AGU Joint Meeting
  • Int'l Joint Research