Expression of the Arabidopsis Borate Efflux Transporter Gene, AtBOR4, in Rice Affects the Xylem Loading of Boron and Tolerance to Excess Boron

Masataka KAJIKAWA; Takahiro FUJIBE; Shimpei URAGUCHI; Kyoko MIWA; Toru FUJIWARA

doi:10.1271/bbb.110629

This article has now been updated. Please use the final version.

Expression of the Arabidopsis Borate Efflux Transporter Gene, AtBOR4, in Rice Affects the Xylem Loading of Boron and Tolerance to Excess Boron

Masataka KAJIKAWA, Takahiro FUJIBE, Shimpei URAGUCHI, Kyoko MIWA, Toru FUJIWARA

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Keywords: boron transporter, inductively coupled plasma mass spectrometer (ICP-MS), high-nutrient tolerance, transgenic rice, xylem sap

JOURNAL FREE ACCESS Advance online publication

Article ID: 110629

DOI https://doi.org/10.1271/bbb.110629

The final version of this article is now available: Vol. 75 (2011) , No. 12 p.2421

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Abstract

Boron is an essential nutrient for plants, but it is toxic in excess. Transgenic rice plants expressing an Arabidopsis thaliana borate efflux transporter gene, AtBOR4, at a low level exhibited increased tolerance to excess boron. Those lines with high levels of expression exhibited reduced growth. These findings suggest a potential of the borate transporter BOR4 for the generation of high-boron tolerant rice.

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