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2023 Fiscal Year Final Research Report

Metal/Metalloid sensing mechanisms in plants

Planned Research

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Project AreaIntegrated Biometal Science: Research to Explore Dynamics of Metals in Cellular System
Project/Area Number 19H05763
Research Category

Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Allocation TypeSingle-year Grants
Review Section Complex systems
Research InstitutionOsaka Metropolitan University (2022-2023)
Osaka Prefecture University (2019-2021)

Principal Investigator

Takano Junpei  大阪公立大学, 大学院農学研究科, 教授 (70532472)

Project Period (FY) 2019-06-28 – 2024-03-31
Keywordsホウ素 / トランスポーター / シロイヌナズナ / カスパリー帯 / 亜鉛
Outline of Final Research Achievements

The project aimed to understand the transport and sensing mechanisms of essential metals and metalloids in plants. The major outcomes are as follows. 1, A borate transporter BOR1 is down-regulated via endocytosis upon high B supply. Our analysis obtained evidence to support a model where BOR1 senses boron concentration during the transport cycle and regulates its own ubiquitination and degradation. 2. We revealed that BOR1 transport boron to support pollen development in anthers. 3. We showed that the Casparian strip functions as a diffusion barrier to limit the diffusion of excessive boric acid into root steles. 4. We analyzed the intracellular localization of zinc transporters in Arabidopsis.

Free Research Field

植物栄養学

Academic Significance and Societal Importance of the Research Achievements

本研究では、植物における必須金属やメタロイドの輸送機構とそれらを制御するための感知機構の理解を目的とした。特にホウ酸のトランスポーターがホウ酸濃度を感知し自己を制御するセンサーとしても働くことを示し、植物のトランスポーターの制御機構として学術的に新しいモデルを提案することができた。研究成果は土壌中の限られた栄養の利用効率や蓄積が高い作物や有害金属を蓄積しない作物の作出につながることが期待される。

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Published: 2025-01-30  

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