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米中のシリコンの流出輸送機
Jian Feng Ma1, Naoki Yamaji, Namiki Mitani
1Research Institute for Bioresources, Okayama University, Chuo 2-20-1, Kurashiki 710-0046, Japan. maj@rib.okayama-u.ac.jp
Nature
|July 13, 2007
まとめ
研究者らは,低シリコンの米2 (Lsi2) という新しい遺伝子を特定し,米の植物のシリコン輸送に不可欠である. Lsi2は,シリコンの流出輸送体として作用し,Lsi1と連携して,植物健康とストレス耐性のために最適な栄養素吸収を確保します.
科学分野:
- 植物生物学 植物生物学
- 分子生物学は分子生物学である.
- 栄養素輸送について
背景:
- シリコンは,米の成長に不可欠であり,様々なストレスに対する耐性を提供します.
- シリコン流入トランスポーター遺伝子Lsi1は以前,米で確認されていた.
研究 の 目的:
- 新種の遺伝子を特徴付けるため,低シリコンの米2 (Lsi2) は,米内のシリコン輸送に関与しています.
- Lsi2.2の輸送メカニズムと細胞の局所性を解明する.
主な方法:
- 米根の遺伝子発現分析.
- Xenopusの卵細胞を用いたタンパク質の局所化研究.
- シリコントランスポーターとしてのLsi2の機能的特徴.
主要な成果:
- Lsi2は,米の根で構成的に表現され,シリコン流出輸送体をコードします.
- Lsi2は,根細胞の近隣側にあるプラズマ膜に定着し,Lsi1.1とは異なる.
- Lsi1 (インフルス) とLsi2 (エフフルス) の結合作用により,細胞間シリコン輸送が効果的に促進されます.
結論:
- Lsi2は,米の新種のシリコン流出トランスポーターです.
- 米は,反逆的な流入と流出のトランスポーターを含むユニークな細胞間栄養素輸送機構を使用しています.
- Lsi2の機能を理解することは,シリコンの吸収と植物の回復力を改善する鍵です.
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