开花地点T1和终端花1监管网络介导果开花的开始
Xiya Zuo1, Shixiang Wang2, Xiuxiu Liu1
1College of Horticulture, Yangling Sub-Center of National Center for Apple Improvement, Northwest A&F University, Yangling, Shaanxi 712100, China.
Plant physiology
|February 17, 2024
概括
一项新的研究揭示了果树如何调节花的形成. 蛋白质MdbHLH48通过平衡FLOWERING LOCUS T (FT) 和TERMINAL FLOWER1 (TFL1) 的表达来控制开花,影响产量和水果质量.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 农业科学 农业科学
背景情况:
- 花的形成对于水果作物的产量和质量至关重要.
- 花区T (FT) 和终端花1 (TFL1) 蛋白质之间的平衡调节了花的诱导.
- 控制水果作物的这种平衡的机制尚未完全理解.
研究的目的:
- 阐明果 (Malus × domestica) 中花形成的调节机制.
- 确定关键蛋白质及其与花诱导和抑制有关的相互作用.
主要方法:
- 在果芽中分析MdFT1和MdTFL1的基因表达.
- 在*Arabidopsis thaliana*和*Solanum lycopersicum*中对MdbHLH48的过度表达研究.
- 蛋白质与蛋白质相互作用测定和转录激活分析涉及MdbHLH48,MdFT1,MdTFL1和MdWRKY6.6.
主要成果:
- 在花诱导过程中,MdFT1的表达增加,而MdTFL1的表达减少,这表明MdTFL1在花抑制中的作用.
- 转录因子MdbHLH48直接调节MdFT1和MdTFL1,在过度表达时促进开花.
- MdbHLH48作为MdFT1的正调节剂和MdTFL1.1的负调节剂.
- MdFT1和MdTFL1与MdWRKY6有竞争性的相互作用,影响了APPLE FLORICAULA/LFY (AFL1) 的转录.
结论:
- 该MdbHLH48-MdFT1/MdTFL1-MdWRKY6模块提供了精细调节的调节果的开花.
- 这些发现提供了关于水果作物中花形成的分子基础的见解.
- 了解这种途径可以通过有针对性的育种或管理策略来提高产量和水果质量.
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