Mechanisms for boron sensing by borate transceptors

2017 Fiscal Year Final Research Report

• Project/Area Number: 26712007
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Plant nutrition/Soil science
• Research Institution: Osaka Prefecture University (2016-2017); Hokkaido University (2014-2015)
• Principal Investigator: TAKANO Junpei 大阪府立大学, 生命環境科学研究科, 教授 (70532472)
• Research Collaborator: YOSHINARI Akira ; WANG Sheliang
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 植物栄養 / センシング / エンドサイトーシス / ホウ素 / 細胞内輸送 / タンパク質分解

Outline of Final Research Achievements

Plants sense mineral concentrations in soils or tissues and regulate membrane transport proteins to response to environmental changes. Boron is an essential element but is toxic when accumulated at high levels. Arabidopsis BOR1 is an borate exporter at the plasma membrane and responsible for boron transport toward root stele. BOR1 is transferred from the plasma membrane to the vacuole for degradation upon high-B supply to avoid boron toxicity. Our results in this study suggested that BOR1 functions as a borate/boric acid transceptor (transporter and receptor) regulating own accumulation in the plasma membrane to maintain boron homeostasis.

Free Research Field

植物栄養学