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两个深度保存的非编码序列控制了PLETHORA1/2的表达,并协调了胚胎和根的发育
Merijn Kerstens1, Yvet Boele2, Abraham Morales-Cruz3
1Cluster of Plant Developmental Biology, Cell and Developmental Biology, Wageningen University & Research, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands.
Plant communications
|July 31, 2025
概括
保存的非编码序列 (CNSs) 调节植物发育基因. 两个新型的中枢神经系统,BOX1和BOX2,控制Arabidopsis中的PLETHORA (PLT) 基因表达,通过自我调节影响胚胎和根部发育.
科学领域:
- 植物分子生物学 植物分子生物学
- 发育遗传学的发展遗传学.
- 基因组学就是基因组学.
背景情况:
- 保存的非编码序列 (CNSs) 对基因调节至关重要.
- 普莱托拉 (PLT) 基因是植物发育的主调节者,对胚胎发生和系统功能至关重要.
- 中枢神经系统调节PLT基因表达的机制在很大程度上是未知的.
研究的目的:
- 识别和描述调节PLT基因表达的中枢神经系统.
- 研究特定中枢神经系统在阿拉比多普西斯莉亚的发育中的作用.
- 阐明胚胎发育和根部发育过程中PLT基因表达背后的调节机制.
主要方法:
- 基于动机的采矿,在120个芽体基因组中对上游序列进行采矿.
- 编辑CRISPR-Cas9基因以在已识别的中枢神经系统 (BOX1和BOX2) 中产生突变.
- 记者基因测试用于分析转基因阿拉比多普西斯菌株中PLT基因的表达模式.
主要成果:
- 确定了21个保存和谱系特定的CNS,包括两种异常长且相似的元素 (BOX1和BOX2).
- 证明BOX1和BOX2直接控制Arabidopsis中的PLT1和PLT2表达.
- 表明BOX1/BOX2中的突变改变了根尖中的PLT2表达模式,并影响了胚胎发育,有证据表明BOX介导的自我调节反循环.
结论:
- 发现了一种涉及BOX1和BOX2中枢神经系统的新型转录机制,该机制调节植物胚胎和根介质系统发育的主调节器.
- 确定了这些深度保存的元素的功能重要性,从胚胎形成到早期发育.
- 提供了对控制植物发育基因表达的自我调节反循环的见解.
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