Polar Trafficking and Boron-Dependent Endocytosis of Borate Transporters

DOI

Bibliographic Information

Other Title
  • 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

Details 詳細情報について

  • CRID
    1390282680607168128
  • NII Article ID
    130006991175
  • DOI
    10.14841/jspp.2007.0.846.0
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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