FKF1は,アラビドopsisの開花への移行を調節する時計制御遺伝子です
D C Nelson1, J Lasswell, L E Rogg
1Department of Biochemistry and Cell Biology, Rice University, Houston, Texas 77005, USA.
Cell
|June 10, 2000
まとめ
研究者らは,アラビドプシスの花開の時間を調節するために重要な新しい遺伝子,FKF1を特定しました. この遺伝子は植物の内部時計に影響を与え,生殖のための環境信号への反応に影響を与えます.
科学分野:
- 植物生物学 植物生物学
- 分子遺伝学 分子遺伝学
- クロノバイオロジーはクロノバイオロジーを用います.
背景:
- 植物の繁殖には,花期を正確に制御することが不可欠です.
- 環境要因が花開のタイミングに大きく影響します.
- アラビドプシス・サリアナ (Arabidopsis thaliana) は,植物の発達を研究するためのモデル生物です.
研究 の 目的:
- 咲く時期の調節に関与する遺伝子を特定し,特徴づけること.
- fkf1変異体における後期開花フェノタイプの基礎にある分子機構を理解する.
- 植物生理時におけるFKF1の役割を調査する.
主な方法:
- FKF1遺伝子を特定するためのポジショナルのクローニング.
- PASとF-boxドメインを含むFKF1タンパク質構造の分析.
- FKF1 mRNAレベルとその振動パターンの測定.
- 時計制御遺伝子の発現に対するFKF1削除の影響を評価する.
主要な成果:
- 遅咲くアラビドプシスの変異体fkf1が分離され,特徴づけられました.
- FKF1は,光受容体のようなドメインとF-boxドメインを持つ新しいタンパク質をコードします.
- FKF1 mRNAは昼間リズム表現を示しています.
- FKF1の削除は,時計制御遺伝子のリズム発現を妨げます.
結論:
- FKF1は,アラビドプシスの花開の時間を調節する上で重要な役割を果たしています.
- FKF1タンパク質は,植物の昼夜時計の調節に関与しています.
- FKF1は植物生殖のタイミングを制御するために環境信号を統合しています.
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