VlMYB12とVlDOF1.5の共同標的であるVlCKX6プロモーターは,ブドウ (Vitis vinifera L.) の果実を促進するCPPUに反応する
Qiaofang Shi1, Yiting Liu1, Ruxin Wang1
1College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang, 471023, Henan Province, China; Henan Provincial Engineering Research Center on Characteristic Berry Germplasm Innovation & Utilization, Luoyang, 471023, Henan, China.
Plant physiology and biochemistry : PPB
|August 23, 2025
まとめ
CPPUのような植物成長調節剤は サイトキニンのレベルを変化させることで 葡萄の果実のセットを改善します 研究者らは,VlMYB12とVlDOF1.5によって調節されるVlCKX6遺伝子を,果実の収穫を増やす鍵として特定しました.
科学分野:
- 植物生物学
- 農業科学
- 分子遺伝学
背景:
- ぶどう (ヴィティス・ヴィニフェラ L.) の収穫量と品質は,若い果実のセットが劣っているため制限されています.
- 合成サイトキニンのCPPUはブドウの果実のセットを高めますが,そのメカニズムは不明です.
- CPPUは,ブドウの内生的なサイトキニンレベルとVlCKX6遺伝子発現に影響します.
研究 の 目的:
- グレープフルーツセットの調節におけるVlCKX6の分子メカニズムを解明する.
- CPPU治療に対するVlCKX6遺伝子の機能と調節を分析する.
主な方法:
- CPPUで処理されたブドウの遺伝子発現分析 (VlCKX6).
- 様々な治療法 (MeJA,CPPU,ABA) の下でVlCKX6プロモーター活性を確認するためのGUS活性測定法.
- タバコにおけるVlCKX6の胎外過剰発現は,表型的効果を観察する.
- VlCKX6プロモーター結合因子 (VlMYB12,VlDOF1.5) を特定するための酵母単混合および二重ルシフェラーゼアッセイ
主要な成果:
- 若いブドウの果実,花束,枝根でVlCKX6の発現がCPPUによって著しく上位調節された.
- MeJAとCPPUはVlCKX6プロモーターの活性を増強し,ABAはそれを抑制した.
- タバコにおけるVlCKX6の過剰発現は,サイトキニン欠乏症のフェノタイプを引き起こした.
- VlMYB12とVlDOF1. 5はVlCKX6プロモーターに直接結合することが確認された.
結論:
- VlCKX6は,シトキニンのレベルを調節することによって,ブドウのセットを調節する上で重要な役割を果たします.
- VlMYB12とVlDOF1.5は,VlCKX6の発現を直接制御し,サイトキニンレベルと果実セットに影響を与えます.
- この研究は,CPPUのメカニズムを理解し,高収量ブドウの品種を開発するための理論的基礎を提供します.
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