2022 Fiscal Year Final Research Report
Analysis of chemical communication for symbiosis between plants and methylotrophic bacteria.
| Project/Area Number |
20K05817
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Review Section |
Basic Section 38020:Applied microbiology-related
|
|---|
| Research Institution | Okayama University of Science |
|---|
Principal Investigator |
Mitsui Ryoji 岡山理科大学, 生命科学部, 教授 (60319936)
|
|---|
| Project Period (FY) |
2020-04-01 – 2023-03-31
|
| Keywords | 植物共生微生物 / メチロトローフ / PQQ / ランタノイド / メタノールデヒドロゲナーゼ / 二成分制御系 / 植物生育促進 / Methylorubrum |
|---|
| Outline of Final Research Achievements |
The Pink Pigmented Facultative Methylotrophs (PPFMs), symbiotic bacteria that inhabit plant leaves, provide plants with compounds such as plant hormones and PQQ to promote their growth. This highlights the potential applications of PPFMs in increasing crop yields. In our study, we specifically focused on the ability of PPFMs to secrete PQQ on the leaves, reducing the impact of reactive oxygen species generated by plants during photosynthesis. The leaf-specific secretion of PQQ is regulated by a two-component regulatory system known as MxbDM, indicating chemical communication between plants and microorganisms, with lanthanides serving as indicators of the plant's position. Disruption of this gene was found to significantly affect enzymes and secretions involved in symbiosis.
|
| Free Research Field |
応用微生物学
|
| Academic Significance and Societal Importance of the Research Achievements |
本研究の成果は地球の温暖化等をはじめとする環境の変化による食糧供給に資することが期待される。植物は根圏や葉圏で多くの微生物と共生関係を築き生育の促進効果や病原性微生物を防御するなどの共生関係を形成しているが、そのメカニズムは不明な点も多い。今回の研究ではPPFMsと呼ばれる微生物群が光合成を補助する役割をもつPQQを葉上特異的に分泌する新たなメカニズムの解明について幾つかの知見が得られた。光合成を補助するためには地上部特に葉面ではたらくことが必要であり、これに遷移金属元素のランタノイドが貢献していることは興味深い。このメカニズムの解明は微生物を用いた先端農業へ貢献が期待される。
|
