MIR157-SPL15モジュールは,短日のアラビドプシス・タリアナとアラビス・アルピーナの開花と花束の発達を調節する
Adrian Roggen1, Alba Lloret1, Yohanna Miotto1
1Department of Plant Developmental Biology, Max Planck Institute for Plant Breeding Research, Cologne, Germany.
PLoS genetics
|September 2, 2025
まとめ
ミクロRNAs miR156とmiR157は,植物の発達を調節する. miR157は,特に短い日間で,古い植物の開花と花束の発達を抑制する上で重要な役割を果たし,この機能は進化的に保存されています.
科学分野:
- 植物 分子 生物学
- 発達生物学
- 遺伝学
背景:
- 植物のライフサイクルの移行は,発芽器官形態学によって制御されます.
- アラビドプシスのmicroRNAs miR156とmiR157の年齢依存的減少は,若者から成人に,そして成人から生殖段階への移行を調節する.
- これらの移行におけるmiR156およびmiR157の特定の役割は明確化が必要です.
研究 の 目的:
- miR156とmiR157の植物発達の制御における特定の貢献を比較する.
- これらのマイクロRNAが花の移行と花束の発達に果たす役割を調査する.
- これらのマイクロRNA機能の進化的保存を決定する.
主な方法:
- 小型RNAのシーケンシングのためのトランスキングダム,迅速かつ手頃な価格のRISCの浄化 (TraPR).
- CRISPR-Cas9による 遺伝子編集です
- コンフォカル画像と遺伝子分析
主要な成果:
- RNA誘発静止複合体 (RISC) の miR157レベルは,より古いアラビドプシスシューツの miR156よりもゆっくりと低下する.
- MIR157CとMIR157Dは,古い植物の特定の組織で発現し,MIR156AとMIR156Cは,シューティングアピスでは検出されません.
- MIR157Cの変異は,短日での開花を加速し,アラビドプシスとアラビスアルピナの花束形態を変化させ,保存された役割を示した. MIR157C-SPL15モジュールはSDで不可欠であり,FLOWERING LOCUS Tは長日 (LD) のみSPL15要件を克服します.
結論:
- MIR157遺伝子は,特にSDでは,花の移行を抑制し,花束の発達を調節する重要な,進化的に保存された役割を果たします.
- miR157は,古い植物におけるmiR156と比較して,明確な発現パターンとより持続的な存在を示しています.
- MIR157C-SPL15の制御モジュールは,SD条件下で開花時間を制御するために重要です.
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