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植物の発達について. 根と胚のメリステム内の遠端幹細胞の運命を遺伝的に制御する
Brian C W Crawford1, Jared Sewell2, Greg Golembeski1
1Division of Biological Sciences, University of California San Diego, La Jolla, CA 92093, USA.
Science (New York, N.Y.)
|January 24, 2015
まとめ
NO TRANSMITTING TRACT (NTT) 遺伝子は,根のメリステムの発達を開始するために不可欠です. 胚形成の過程で遠端幹細胞の運命を決定するために,下垂体におけるそれらの発現は極めて重要です.
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
- 幹細胞生物学 幹細胞生物学とは
背景:
- 根のメリステムは植物成長に不可欠であり,幹細胞と静止センターで構成されています.
- 胚形成中の根メリスタムの始動には,細胞分裂のヒポフィーゼが含まれています.
研究 の 目的:
- 根のメリスタムの開始に必要な遺伝子を特定する.
- 根幹細胞の運命を決定する NO TRANSMITTING TRACT (NTT) 遺伝子の役割を明らかにする.
主な方法:
- 遺伝子の発現分析は,ヒポフィーシスで行われます.
- オキシンシグナル伝達経路依存性の調査.
- 胚と成熟した根の発達における遺伝子機能を評価する.
主要な成果:
- ルーツメリステムのイニシアチブには,無伝送経路 (NTT) と2つのパラログが必要である.
- これらの遺伝子は下垂体で発現し,オクシンシグナル伝達によって調節されます.
- NTT遺伝子の発現は,遠端幹細胞の運命を決定する上で不可欠であり,誤発現は他の細胞の運命を決定する.
結論:
- NTT遺伝子は,根メリシステムの開始とパターニングにおいて重要な役割を果たします.
- アクシンシグナル伝達は,NTT遺伝子の発現を調節し,幹細胞の分化を制御する.
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