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一个新的CsbZIP26-CsSEP4-CsSPL18调节模块控制了Cymbidium sinense中的妇体形态和花结构

Zengyu Lin^1,2, Chuqiao Lu¹, Yibing Wang¹

¹Guangdong Key Laboratory of Ornamental Plant Germplasm Innovation and Utilization, Environmental Horticulture Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China.

Horticulture research

|March 9, 2026

概括

研究人员确定了一种基因调节模块,CsbZIP26-CsSEP4-CsSPL18,可以控制 Cymbidium sinense 中的 gynostemium 发育. 这一发现揭示了花形态变异和兰花进化.

科学领域:

植物生物学植物生物学
发展生物学发展生物学
遗传学是一个遗传学.

背景情况:

花的器官发育对于植物的繁殖和装饰价值至关重要.
生殖器官的异常导致Cymbidium sinense品种的花变异.
Gynostemium变种 (GV) 品种提供了对花形态发生和演变的见解.

研究的目的:

为了确定调节 Cymbidium sinense 中 gynostemium 发育的遗传因素.
阐明基因体变异形成的基础分子机制.
为了理解兰花中花形态的进化多样化.

主要方法:

全基因组关联研究 (GWAS) 以确定与GV.相关的单核酸多态 (SNP).
在 gynostemium 发育中的 CsSEP4 基因的功能分析.
酵母单杂交 (Y1H),双化酶记者测定和DNA亲和力净化测序 (DAP-seq) 来研究基因相互作用.

主要成果:

在CsSEP4促销器区域的SNP与妇体变异密切相关.
转录因子CsbZIP26通过与其促进体结合来调节CsSEP4的表达.
在CsSEP4促进体中发生的突变会破坏CsbZIP26的结合,导致异常的妇体发育.
CsSEP4直接激活其下游目标基因,CsSPL18.的表达.
模块CsbZIP26-CsSEP4-CsSPL18控制了花茎生殖器的发育和花的形态.

结论:

在Cymbidium sinense中,CsbZIP26-CsSEP4-CsSPL18调控模块对于生殖器发育至关重要.
这个模块中的遗传变异有助于兰花的花形态的多样性.
这项研究为了解兰花的进化和多样性提供了一个分子框架.

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