An efflux transporter of silicon in rice

Jian Feng Ma (), Naoki Yamaji, Namiki Mitani, Kazunori Tamai, Saeko Konishi, Toru Fujiwara, Maki Katsuhara and Masahiro Yano
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Jian Feng Ma: Research Institute for Bioresources, Okayama University, Chuo 2-20-1, Kurashiki 710-0046, Japan
Naoki Yamaji: Research Institute for Bioresources, Okayama University, Chuo 2-20-1, Kurashiki 710-0046, Japan
Namiki Mitani: Research Institute for Bioresources, Okayama University, Chuo 2-20-1, Kurashiki 710-0046, Japan
Kazunori Tamai: Research Institute for Bioresources, Okayama University, Chuo 2-20-1, Kurashiki 710-0046, Japan
Saeko Konishi: Institute of Society for Techno-innovation of Agriculture, Forestry and Fisheries, Kamiyokoba, Tsukuba, Ibaraki, 305-0854, Japan
Toru Fujiwara: Biotechnology Research Center, The University of Tokyo, Bunkyo Ku, Tokyo, 113-8657, Japan
Maki Katsuhara: Research Institute for Bioresources, Okayama University, Chuo 2-20-1, Kurashiki 710-0046, Japan
Masahiro Yano: QTL Genomics Research Center, National Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, Japan

Nature, 2007, vol. 448, issue 7150, 209-212

Abstract: How rice grabs its silicon Silicon plays a beneficial role in plant growth: it increases the resistance of plants to pests and diseases and helps minimize transpiration losses. Rice is a typical silicon-accumulating plant, able to build up silicon levels in the shoots thanks to the ability of the roots to take it up from the soil. The sophisticated system that achieves this was partially characterized when a 'low silicon' gene, Lsi1, was shown to encode an influx transporter to move silicon from the soil into root cells. Now, the second step in the process — the efflux of silicon from root cells into the core of vascular tissue running through the root — has been revealed with the discovery of a second low silicon gene, the efflux transporter Lsi2.

Date: 2007
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DOI: 10.1038/nature05964

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