2022 Fiscal Year Final Research Report
Quantitative tracking for the mycoheterotrophic evolution in Pyroleae
| Project/Area Number |
19K23762
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Multi-year Fund |
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| Review Section |
0703:Biology at organismal to population levels and anthropology, and related fields
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
2019-08-30 – 2023-03-31
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| Keywords | イチヤクソウ / 菌従属栄養植物 / 進化 / 分類 / アルビノ |
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| Outline of Final Research Achievements |
In the process of searching for populations of Pyroleae in Japan, I discovered a population including albino mutants of Pyrola japonica. The albino mutants were reported first time from partially mycoheterotrophic species in angiosperms other than orchids. Next, in the process of herbarium specimen surveys, I found that the lectotype of P. subaphylla is a mixed gathering that comprises three plants of P. subaphylla and one of P. japonica. It is desirable to re-designate the lectotype to exclude the P. japonica individual. Although I conducted field surveys in a total of 30 populations of 9 species mainly in eastern Japan and collected morphological data and samples for stable isotope analysis, I could not conducted stable isotope analysis because due to the delay of the research plan by the COVID-19 pandemic.
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| Free Research Field |
植物分類・系統学
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| Academic Significance and Societal Importance of the Research Achievements |
イチヤクソウ亜科で生じた菌従属栄養性の進化を，葉のサイズを利用して定量的に追跡した。菌従属栄養植物は，近縁な緑葉植物と比較して特殊な生態や形態を示すことから進化過程の追跡が難しい植物群とされる。またラン科とは遠縁であるツツジ科で白化個体を発見できたことにより，これまでラン科を用いて得られてきた知見と比較することが可能になった。ラン科の白化個体は，菌従属栄養植物の進化過程を研究する材料としてしばしば活用されてきた。付随して，絶滅危惧種に指定されているイチヤクソウ亜科の分布／生育情報を収集することができた。
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