アラビドプシスの根時計は 細胞壁の改造と 膀の密輸を媒介する
Guy Wachsman1,2, Jingyuan Zhang2, Miguel A Moreno-Risueno3
1Howard Hughes Medical Institute, Duke University, Durham, NC 27708, USA.
Science (New York, N.Y.)
|November 13, 2020
まとめ
植物の根の発達は根の時計に依存している. 研究者らは,GNOMとペクチンのエステル化バランスがこの時計の重要な調節因子であり,アラビドプシス・タリアナの横の根の開始を制御することを発見しました.
科学分野:
- 植物生物学
- 分子生物学
- 発達生物学
背景:
- アラビドプシス・タリアナの横根形成は,根時計として知られる周期的な遺伝子発現パターンによって制御される複雑なプロセスです.
- 根の時計を制御する分子機構を理解することは 植物の根の構造と発達を理解するために不可欠です
研究 の 目的:
- 根の時計と横の根の開始の新しいレギュレータを特定する.
- 根の発達における膀の輸送と細胞壁の構成要素の役割を明らかにする.
主な方法:
- アラビドプシス・タリアナの 逆遺伝子を利用した
- GNOM (膀取引の調節体) とADENOSINE PHOSPHATE RIBOSYLATION FACTOR GTPase ACTIVATION PROTEIN DOMAIN3の機能について調査した.
- 側面の根の原始発生部位でのペクチン分布とエステル化状態を分析した.
主要な成果:
- GNOMとADENOSINE PHOSPHATE RIBOSYLATION FACTOR GTPASE ACTIVATION PROTEIN DOMAIN3を根時計の重要なレギュレータとして特定した.
- GNOMがペクチンの分布に影響し,ペクチンのエステル化状態は根の時計機能に不可欠であることを示した.
- ペクチンのエステル化を制御する遺伝子は,根の時計活動と横根の開始に直接影響を及ぼすことが示されました.
結論:
- エステル化されたペクチンと非エステル化されたペクチンのバランスは,正しい根時計の機能に不可欠です.
- GNOMのようなレギュレータによって調節され,適切なプクチンの変異と分布は,時効的な側根プリモルディアの開始に不可欠です.
- この研究は 細胞壁の動態と 植物発達の分子調節の間の新しい関連性を明らかにしています
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