NRT/PTRトランスポーターは,グルコシノラート防御化合物のシードへの転移に不可欠です
Hussam Hassan Nour-Eldin1, Tonni Grube Andersen, Meike Burow
1Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, 1871Frederiksberg C, Denmark.
Nature
|August 7, 2012
まとめ
研究者らは,GTR1とGTR2を,重要な植物防衛化合物であるグルコシノラートを,アラビドプシスの種に移動させるための重要なトランスポーターとして特定した. この発見は,農業における植物防護化合物の配分を制御する可能性を秘めています.
科学分野:
- 植物分子生物学 植物分子生物学
- 植物生理学 植物生理学
- バイオケミストリー バイオケミストリー
背景:
- グルコシノレートなどの植物防衛化合物は,貴重な組織を保護するために不可欠です.
- これらの化合物の長距離輸送機構は,分子レベルでほとんど特徴づけられていない.
- アラビドプシス・サリアナは,植物の防御と転移プロセスを研究するためのモデル生物です.
研究 の 目的:
- 植物におけるグルコシノ酸塩の長距離輸送に起因する分子成分を特定する.
- 新しいグルコシノレートトランスポーターの機能と局所を特徴づける.
- グルコシノレート転位を理解することの農業への影響を調査する.
主な方法:
- アラビドプシスの変異体 (gtr1 gtr2 ダブル変異体) の遺伝子解析.
- バイオケミカルアッセイ (陽子依存,高親和) を用いてトランスポーター活動の特徴化.
- プラズマ膜関連性を決定するサブセルラー局所化研究.
主要な成果:
- GTR1とGTR2をグルコシノラート特異的トランスポーターとして特定し,特徴づけました.
- gtr1 gtr2のダブルミュータントは,種子グルコシノラート蓄積に重大な欠陥を示した.
- ミュータント植物では,ソース組織 (葉,シリキューム壁) にグルコシノラートが過剰に蓄積されている.
- GTR1とGTR2は,プラズマ膜に局所化し,フロームの負荷に不可欠である.
結論:
- GTR1とGTR2は,グルコシノラートが源からシンク組織に長距離輸送するために不可欠です.
- これらのトランスポーターは,グルコシノラートが転移のためにフロームに負荷されるのを容易にします.
- GTR1とGTR2の識別は,農業における植物防護化合物の配分を操作するためのターゲットを提供します.
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