研究支援ツール - 文献 - 詳細

文献詳細

文献
著者 Ma,J.F., Yamaji,N., Mitani,N., Tamai,K., Konishi,S., Fujiwara,T., Katsuhara,M. and Yano,M.
タイトル An efflux transporter of silicon in rice
Abstract:
Silicon is an important nutrient for the optimal growth and sustainable production of rice. Rice accumulates up to 10% silicon in the shoot, and this high accumulation is required to protect the plant from multiple abiotic and biotic stresses. A gene, Lsi1, that encodes a silicon influx transporter has been identified in rice. Here we describe a previously uncharacterized gene, low silicon rice 2 (Lsi2), which has no similarity to Lsi1. This gene is constitutively expressed in the roots. The protein encoded by this gene is localized, like Lsi1, on the plasma membrane of cells in both the exodermis and the endodermis, but in contrast to Lsi1, which is localized on the distal side, Lsi2 is localized on the proximal side of the same cells. Expression of Lsi2 in Xenopus oocytes did not result in influx transport activity for silicon, but preloading of the oocytes with silicon resulted in a release of silicon, indicating that Lsi2 is a silicon efflux transporter. The identification of this silicon transporter revealed a unique mechanism of nutrient transport in plants: having an influx transporter on one side and an efflux transporter on the other side of the cell to permit the effective transcellular transport of the nutrients.
掲載誌 Nature
Country
刊数 448(7150)
ページ 209-212
発刊年 2007
PubMed ID 17625566
PubMed Central ID -
DOI 10.1038/nature05964
URL -
関連情報
遺伝子 LSI1 LSI2
INSD AB222273
系統 野生イネ
コアコレクション
-
突然変異系統(遺伝研 Collection) -
種子不稔系統 -
致死変異体系統 -
組織別発生段階
- 突然変異系統(遺伝子)
-
栽培イネ品種(遺伝研 Collection) -
組織別発生段階 -
/rice/oryzabase