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Plant and Cell Physiology Advance Access originally published online on September 24, 2009
Plant and Cell Physiology 2009 50(11):1977-1981; doi:10.1093/pcp/pcp130
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© The Author 2009. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org

Short Communication

Arabidopsis NIP1;1 Transports Antimonite and Determines Antimonite Sensitivity

Takehiro Kamiya1 and Toru Fujiwara1,2,*

1Biotechnology Research Center, University of Tokyo, Yayoi, Bunkyo-ku, Tokyo, 113-8657 Japan
2Core Research for Evolutionary Science and Technology, Japan Science and Technology Agency, Chuo-ku, Tokyo, 103-0027 Japan

*Corresponding author: E-mail, atorufu{at}mail.ecc.u-tokyo.ac.jp; Fax, +81-3-5841-2408.


  Abstract

Antimony (Sb) is toxic to organisms including plants. Although it is not essential to organisms, plants take up Sb from the environment. In this study, we identified an antimonite [Sb(III)] transporter from Arabidopsis thaliana. We examined the Sb(III) tolerance of the disruption mutant plants of arsenite [As(III)] transporters, nodulin 26-like intrinsic proteins (NIPs), since Sb(III) is similar to As(III) in structure. One of the mutants, nip1;1, showed Sb(III) tolerance and accumulated less Sb. Furthermore, yeast expressing NIP1;1 accumulated twice as much Sb as control. These data indicate that NIP1;1 transports Sb(III) and determines the Sb(III) sensitivity of A. thaliana.

Keywords: Antimony - NIP - Transport

Abbreviations: As, arsenic; ICP-MS, inductively coupled plasma mass spectrometry; MIP, major intrinsic protein; NIP, nodulin 26-like intrinsic protein; Sb, antimony.

(Received August 1, 2009; Accepted September 16, 2009)
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