Polar Trafficking and Boron-Dependent Endocytosis of Borate Transporters
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- Takano Junpei
- Biotechnology Research Center, Tokyo Univ.
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- Toyoda Atsushi
- Biotechnology Research Center, Tokyo Univ.
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- Miwa Kyoko
- Biotechnology Research Center, Tokyo Univ.
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- Fujiwara Toru
- Biotechnology Research Center, Tokyo Univ. SORST, JST
Bibliographic Information
- Other Title
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- シロイヌナズナホウ酸トランスポーターの極性を持った細胞内局在とホウ素に依存したエンドサイトーシス
Abstract
Boron (B) is essential for plants but toxic when present in excess. Arabidopsis thaliana BOR1 is a borate exporter for efficient B translocation under B limitation (Takano et al. 2002). Using P35S:BOR1-GFP plants, we have shown that BOR1 is regulated by B-dependent endocytosis and degradation (Takano et al. 2005).<br>Here we report localization and B-dependent regulation of BOR1-GFP expressed under control of the BOR1 promoter. BOR1-GFP was localized to steler cells in mature portion of roots and also to various cells in root tip under B limitation. In root tip, BOR1-GFP was preferentially localized on the plasma membrane of the proximal side of the epidermal cells. These results suggest that BOR1 functions for B transport into xylem in mature portion for root-to-shoot B translocation while it is for radial B transport towards inner portions in root tip.
Journal
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- Plant and Cell Physiology Supplement
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Plant and Cell Physiology Supplement 2007 (0), 846-846, 2007
The Japanese Society of Plant Physiologists
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Details 詳細情報について
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- CRID
- 1390282680607168128
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- NII Article ID
- 130006991175
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- Data Source
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- JaLC
- CiNii Articles
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- Abstract License Flag
- Disallowed