2022 Fiscal Year Final Research Report
Physiological role of novel UV-absorbing substances in the terrestrial cyanobacterium
Project/Area Number |
20K05724
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 37020:Chemistry and chemical methodology of biomolecules-related
|
Research Institution | Kanazawa University |
Principal Investigator |
|
Project Period (FY) |
2020-04-01 – 2023-03-31
|
Keywords | 環境耐性 / 極限環境生物 / 光合成 / 天然物 / 無水生活様式 |
Outline of Final Research Achievements |
Mycosporine-like amino acids (MAAs) are UV-absorbing pigments. The terrestrial cyanobacterium Nostoc commune is classified into four chemotypes by differences in their MAA derivatives. The dry thalli are sold as a food in China under the name of Di Pi Cai. Nostoc-756, mycosporine-2-(4-deoxygadusolyl-ornitine), was found to be a main MAA in Di Pi Cai. Molecular genetic features of Di Pi Cai did not exactly match those of genotypes found in Japan, which suggests the global diversity of N. commune. Recovery of photosynthesis in a short time after rehydration was examined using our laboratory stocks of N. commune thalli after long-term storage in a desiccated state. Although there was an exceptional case in which photosynthetic oxygen evolution recovered after 8 years of storage at room temperature, the ability to recover photosynthesis can be maintained for several years. The trial to develop "paper with photosynthesis capability" was successful to be used as a material for works of art.
|
Free Research Field |
植物生理生化学
|
Academic Significance and Societal Importance of the Research Achievements |
中国産「地皮菜」についての解析結果は,新たな多様性を示唆しており,今度,地球規模でイシクラゲの多型を調べていく必要がある。イシクラゲが示す乾燥耐性について長期保存の限界を実験的に検証し,乾燥状態で最長8年間保存したサンプルでも光合成活性を回復する例が示された。この結果は,本生物における光合成活性の寿命を学術的に検証した論文として初めての記載である。イシクラゲを利用して「光合成をする紙」を作製する試みは,芸術作品の素材とすることを想定しているが,さらに研究を進めてストレス環境下で光合成装置を保護するしくみの解明や生物活性を長期に乾燥保存する技術開発へ活かされていくであろうと期待する。
|