2022 Fiscal Year Final Research Report
How do plant roots acclimate to highly concentrated salt water?
Project/Area Number |
20K06312
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 41040:Agricultural environmental engineering and agricultural information engineering-related
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Research Institution | Iwate University |
Principal Investigator |
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Project Period (FY) |
2020-04-01 – 2023-03-31
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Keywords | hydraulic lift / 塩水の農業利用 |
Outline of Final Research Achievements |
The visual images of the surface of the medium showed that the wet area of the medium in the salt water flooded area was 4 cm higher than the capillary rise height, indicating that water was redistributed to the dry area by the hydraulic lift. In the relationship between the distribution of water and salt content and root distribution in the saltwater-logged medium, roots surviving with high water content redistributed water to the surrounding area by the hydraulic lift. The roots were redistributed by the Hydraulic Lift or by the water redistribution. Oxygen consumption rate was a parameter of respiratory activity, and the physiological state of the roots differed between the saltwater-treated and control plots.
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Free Research Field |
農業環境・情報工学
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Academic Significance and Societal Importance of the Research Achievements |
高濃度塩水湛水栽培において植物がhydralic liftで水を再配分し根系を健康に保つ現象現象は,砂漠で巨木がオアシスを形成するのと同じ原理であると考えられる.すなわち,本研究で更にメカニズム解明が進んだもみ殻培地を利用した高濃度塩水湛水栽培を応用すれば,わずか20cmほどの厚さの培地で,巨木の深根が行うhydralic liftで成り立つ砂漠のオアシス形成と同様の現象を可能にする新栽培技術は社会的意義が高い. 植物が塩水湛水栽培に順化するメカニズムは,これまでの研究例が少なく新規性が高い.そのメカニズムを解明し,植物の塩ストレス抵抗性の獲得について新たな知見が得られたことは学術的に意義深い.
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