クリプトクロームはPIFと直接相互作用し,青い光を制限して植物の成長を制御する
Ullas V Pedmale1, Shao-Shan Carol Huang2, Mark Zander3
1Howard Hughes Medical Institute, Salk Institute for Biological Studies, La Jolla, CA 92037, USA; Plant Biology Laboratory, Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA.
Cell
|January 4, 2016
まとめ
植物は 青と赤の光センサーを使って 影の下で成長します クリプトクローム (CRY) とフィトクロームはPIF転写因子と相互作用し,植物が変化する光条件に適応することを可能にします.
科学分野:
- 植物生物学
- 写真受信
- 植物の成長の分子メカニズム
背景:
- 植物は光波長を感知して 成長と発達を制御します
- クリプトクローム (Cryptochromes, CRY) は,植物反応に影響を与える青光光受容体である.
- 植物染色体は赤色と遠赤色の光を検知し,成長の調節にも影響を与えます.
研究 の 目的:
- 高級植物暗号染色体 (CRY) が青い光に反応して植物の成長を調節する方法を調査する.
- 異なる照明条件下でのCRY,フィトクローム,bHLH転写因子 (PIF) の相互作用を理解する.
- 異なる光波長によって引き起こされる 異なる遺伝子調節プログラムを解明する.
主な方法:
- 青と赤の光に対する植物反応の分析
- CRYとPIF転写因子の間の物理的な相互作用を調査する.
- 異なった光条件下での遺伝子発現を比較するためのトランスクリプトーム分析.
主要な成果:
- CRYは天井の条件下では 青い光が減っていることを検知します
- CRYはPIF4とPIF5の転写因子と直接相互作用する.
- 異なる遺伝子調節プログラムが 青と赤の光によって活性化されますが PIFは両方とも関与しています
- CRYは,光受容体信号を統合して,全ゲノムにわたるPIF活動を調節する.
結論:
- CRYは,PIFの活動を調節することによって,植物の影回避反応の主要な調節体です.
- PIF転写因子は,CRY (青光) とフィトクローム (赤/遠赤光) の両方の信号を統合する.
- この統合されたシグナリングにより 植物は様々な光環境に対応して 成長の調整を容易にします
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