2022 Fiscal Year Final Research Report
Analysis of the ancestral function of the plant hormone KL as a regulator of vegetative reproduction using hornworts
| Project/Area Number |
21K20649
|
|---|
| Research Category |
Grant-in-Aid for Research Activity Start-up
|
| Allocation Type | Multi-year Fund |
|---|
| Review Section |
0702:Biology at cellular to organismal levels, and related fields
|
|---|
| Research Institution | Tohoku University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2021-08-30 – 2023-03-31
|
| Keywords | 陸上植物 / 進化 / 栄養繁殖 / 植物ホルモン / KL信号伝達 / コケ植物 / ツノゴケ類 |
|---|
| Outline of Final Research Achievements |
Plants propagate vigorously by generating clones through a process called vegetative reproduction. KAI2-Ligand (KL), an as-yet-unknown novel plant hormone, is one of the regulators of vegetative propagation. In this study, we investigated the mechanism of KL signaling and vegetative reproduction in hornworts.
In the hornwort Anthoceros agrestis, we comprehensively searched for target genes of KL signaling, and identified genes that are widely conserved in land plants. Additionally, we generated KL-response reporter plants and plants that blocked the KL signaling to further analyze the physiological function of KL. Furthermore, we explored the developmental basis of vegetative reproduction in the hornwort A. angustus, which evolved a unique vegetative reproduction system. To facilitate future experiments as a new research model for vegetative reproduction, we established a transformation method in A. angustus.
|
| Free Research Field |
植物発生
|
| Academic Significance and Societal Importance of the Research Achievements |
栄養繁殖は植物の重要な繁殖戦略であるとともに、植物栽培における重要な性質でもある。本研究では、陸上植物で共通してKL信号伝達に制御される遺伝子を明らかにした。これらの遺伝子とKLによる栄養繁殖制御の関係を明らかにすることで、栄養繁殖を精緻に制御する技術につながると期待される。
また、本研究ではホウライツノゴケという新たな栄養繁殖の研究モデルを立ち上げた。ツノゴケ類はコケ植物のなかでも最初期に分岐した系統であり、被子植物などの維管束植物や従来のモデルコケ植物とは進化的に大きな隔たりがある。今後、栄養繁殖の普遍性や多様性を解明する研究への展開が期待される。
|
