アラビドプシスの幹細胞の調節と花のパターンの間の分子リンク
J U Lohmann1, R L Hong, M Hobe
1Plant Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA.
Cell
|July 7, 2001
まとめ
ホメオティック遺伝子であるAGAMOUS (AG) と花の同一性タンパク質であるLEFY (LFY) が花の発達を活性化します. AGはまた,花の成長と発達を制御するWUSCHEL (WUS) を抑制します.
科学分野:
- 植物発達生物学 植物発達生物学
- 分子遺伝学 分子遺伝学
- フローラルの発達.
背景:
- ホメオティック遺伝子のAGAMOUS (AG) は,アラビドプシスの花の発達,臓器のアイデンティティと幹細胞の増殖を制御するために不可欠です.
- 花の同一性タンパク質 LEAFY (LFY) とホメオドメインタンパク質 WUSCHEL (WUS) は,植物の発達における重要な調節因子である.
- WUSは,芽と花のメリスタムの幹細胞集団を維持することが知られている.
研究 の 目的:
- AG発現の活性化におけるLFYとWUSの協力的な役割を調査する.
- 花のホメオティック遺伝子調節におけるWUSの機能を調査する.
- 花のメリシステム決定におけるAGとWUSのフィードバックメカニズムを解明する.
主な方法:
- 遺伝子発現分析 遺伝子発現分析
- 分子相互作用の研究は,分子相互作用の研究である.
- アラビドプシス・タライアナの遺伝子解析
主要な成果:
- LFYとWUSは,花中心のAG発現を活性化するために協力しています.
- WUSは,花のホメオティック遺伝子発現の調節に予期せぬ役割を果たし,保存されたメリステムパターニングシステムをサポートします.
- AGはWUS発現を否定的に調節し,特定の花の成長のためのフィードバックループを確立します.
結論:
- 花のパターニングは,保存されたメリシステムパターニングシステムを利用します.
- LFY,WUS,AGの相互作用は,適切な花のオーガノゲネシスと一定の成長のために不可欠です.
- AGとWUSの間のネガティブなフィードバックループは,花のメリステムの増殖を終了するために重要です.
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