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論文

Rice plants take up iron as an Fe$$^{3+}$$-phytosiderophore and as Fe$$^{2+}$$

石丸 泰寛*; 鈴木 基史*; 塚本 崇志*; 鈴木 一正*; 中園 幹生*; 小林 高範*; 和田 泰明*; 渡辺 智; 松橋 信平; 高橋 美智子*; et al.

Plant Journal, 45(3), p.335 - 346, 2006/02

 被引用回数:521 パーセンタイル:99.64(Plant Sciences)

${it OsIRT2}$ gean was isolated from rice, which is highly homologous to ${it OsIRT1}$. Real-time PCR analysis revealed that ${it OsIRT1}$ and ${it OsIRT2}$ are expressed predominantly in roots, and these transporters are induced by low-Fe condition. Analysis using the positron-emitting tracer imaging system showed that rice plants are able to take up both an Fe$$^{3+}$$-phytosiderophore and Fe$$^{2+}$$. This result indicates that, in addition to absorbing an Fe$$^{3+}$$-phytosiderophore, rice possesses a novel Fe-uptake system that directly absorbs the Fe$$^{2+}$$, a strategy that is advantageous for growth in submerged conditions.

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