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对称性破裂的时刻:在早期的花发育期间,CYCLOIDEA表达的时空动力学

Ya Min^1,2, Bianca T Ferreira¹, Yao-Wu Yuan¹

¹Department of Ecology and Evolutionary Biology, University of Connecticut, Storrs, CT, 06269, USA.

bioRxiv : the preprint server for biology

|August 13, 2025

概括

花的对称性依赖于周期 (CYC) 基因调节. 早期的花发育使用定位线索,而不是auxin或BLADE-ON-PETIOLE (BOP),以建立对称性的CYC表达.

科学领域:

发育生物学是发展生物学.
进化生物学是进化的生物学.
植物遗传学植物遗传学

背景情况:

花的双边对称性对于繁殖成功至关重要.
循环 (CYC) 基因调节沿背腹轴的花对称性.
在CYC基因调节中,auxin和BLADE-ON-PETIOLE (BOP) 的作用尚未完全理解.

研究的目的:

研究花发育期间CYC基因表达的时空动态.
确定auxin和BOP在调节CYC表达中的作用.
阐明花对称性建立背后的机制.

主要方法:

在Mimulus parishii中进行转基因操纵.
光共聚焦成像可视化基因表达和辅酶活性.
野生类型和mpbop突变植物突变物的比较.

主要成果:

在检测到辅酶最大之前,MpCYC基因获得了背部表达.
在启动过程中,野生类型和mpbop突变物之间的MpCYC表达没有差异.
在花突变 (FM) 扩张期间,auxin最大值是动态的.
野生类型的MpCYC表达仍然在背部受到限制,但在FM扩张期间在mpbop突变中广泛扩展.

结论:

早期的花对称性破裂是由独立于auxin或BOP的位置线索指导的.
在后期的花发育过程中,auxin和BOP对于提炼和维持背部特定的CYC表达是必不可少的.
在模型系统中先进的成像提供了对花发育和进化的洞察.

关键词:

在PETIOLE上的刀片.环流体 (CYCLOIDEA) 是一个环流体.辅助剂辅助剂辅助剂与焦点一致的成像技术花的对称性是花的对称性.

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