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フロームの細胞別解剖は,成熟グラデントと細胞特異性を関連付けている

Pawel Roszak¹, Jung-Ok Heo^1,2, Bernhard Blob¹

¹The Sainsbury Laboratory, University of Cambridge, Cambridge, UK.

Science (New York, N.Y.)

|December 23, 2021

まとめ

植物の根の発達には調整された成熟グラデーションと細胞ネットワークが含まれますアラビドプシス・タリアナ根のプロトフローメの分化に早期のDNA結合因子 (PEAR) とPLETHORAグラデーションが作用する.

科学分野:

植物生物学
発達生物学
遺伝学

背景:

植物のメリステムは組織全体にわたる成熟グラデーションと特殊な細胞ネットワークを含む複雑な発達プロセスを表します.
植物における無限期間の成長は,様々な発達段階におけるこれらの要素の正確な調整に依存しています.

研究の目的:

アラビドプシス・タリアナ根のプロトフローム発達の軌道を,単細胞トランスクリプトミクスを使って再構築する.
フロームの発達におけるPHLOEM EARLY DNA-BINDING-WITH-ONE-FINGER (PEAR) 転写因子とPLETHORAグラデーションの役割を明らかにする.

主な方法:

単細胞トランスクリプトミクスは,プロトフロームの発達経路を分析するために使用された.
系統分裂と分化プライミングにおける PEAR 転写因子の機能を調査した.
差異化プログラムを抑制するPLETHORA転写因子グラデントの調節作用を調べた.

主要な成果:

PEAR転写因子は,グアノシントリフォスファテーゼシグナル伝達を活性化することによって,系統分裂を媒介することが判明した.
PLETHORA転写因子のメリステム幅のグラデントは,プロトフローム分化プログラムの抑制剤として識別された.
PLETHORAグラデーションの分散は,レギュレータの相互阻害を含む分化プログラムの活性化を可能にしました.

結論:

広範な成熟グラデーションと細胞型特異の転写レギュレータは,フロームの発達における細胞分化を指揮する.
PEARとPLETHORA因子の相互作用は,アラビドプシスの根のプロトフレームの分化段階を決定する上で極めて重要です.

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