表面曲線の遺伝的コントロール

Utpal Nath¹, Brian C W Crawford, Rosemary Carpenter

¹Department of Cell and Developmental Biology, John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK.

Science (New York, N.Y.)

|March 1, 2003

まとめ

Antirrhinum cin mutantは,葉の平らさがどのように制御されているかを明らかにしています. CIN遺伝子は,特に葉の縁の成長停止信号に対する細胞の感受性を高め,平らさを促進します.

科学分野:

植物生物学植物生物学
発達生物学発達生物学とは
バイオフィジックス生物物理学

背景:

生物学的表面の曲線は,数学的に,そして生体物理的に研究されています.
生物学的曲線の分子的および発達的基礎は,ほとんど未知のままである.

研究の目的:

Antirrhinum cin mutantを用いて葉の曲線の分子と発達的基礎を調査する.
葉の形状と平らさを調節するCIN遺伝子の役割を明らかにする.

主な方法:

折りたたみのある葉を持つAntirrhinumの cin変異体の分析.
葉の形状と細胞サイクル進行における発達変化の観察.
細胞サイクル停止前線のCINの遺伝子発現分析.

主要な成果:

cin mutantは,限界領域で過剰な成長を示し,負の曲線につながります.
葉の発達は,先端から底まで進行する細胞サイクル停止フロントを示しています.
TCPタンパク質であるCINは,このアストフロントの下流で発現する.

結論:

CINは,特に辺縁の領域で,停止信号に対する細胞の感受性を高めることによって,葉の平らさを促進します.
このメカニズムは,発達中の生物の表面の曲線の調節に寄与する.

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