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偶然的胚胎因果基因FhRWP调节类繁殖中的多种发育表型

Xietian Song¹, Nan Wang^1,2, Yin Zhou¹

¹National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, Huazhong Agricultural University, Wuhan, 430070, China.

The Plant journal : for cell and molecular biology

|June 16, 2024

概括

类RWP基因通过核细胞胚胎生成控制无性繁殖. 它在Fortunella hindsii中的染色质可访问性和表达性揭示了它在胚胎形成和植物再生中的作用.

科学领域:

植物生殖生物学植物生殖生物学
分子遗传学分子遗传学
植物生物技术植物生物技术

背景情况:

偶然胚胎是植物无性繁殖的一种形式,对于植物的繁殖和遗传研究至关重要.
RWP基因被确定为控制类植物核细胞胚胎发生的主要遗传因素,但其确切的功能尚不清楚.
了解核细胞胚胎发生背后的分子机制,可以增强植物再生策略.

研究的目的:

调查RWP基因在类植物中核细胞胚胎生成启动中的作用.
探索多胚胎与单胚胎类基因型中的染色质可访问性和RWP基因表达之间的关系.
阐明RWP在调节体细胞胚胎命运和植物再生中的作用.

主要方法:

使用Fortunella hindsii (一种快速生长的类亲属) 作为模型系统.
在核细胞胚胎生成启动过程中分析了染色质可访问性模式.
使用RNA干扰 (RNAi) 和基因编辑 (CRISPR-Cas9) 来研究FHRWP基因功能.
进行过度表达实验,以评估FhRWP在诱导胚胎性形形成方面的潜力.

主要成果:

在多胚胎 (PO) 基因型与单胚胎 (MO) 基因型相比,观察到较高的染色质可访问性,特别是在FHRWP促进器区域.
下调FhRWP表达减少了核细胞胚胎数量,而淘汰导致了异常的下芽发育.
过度表达FhRWP诱导了MO干段的胚胎性形成,这表明它在体细胞重编程中的作用.

结论:

在类植物中,RWP基因表现出型功能,影响进发性胚胎形成和尾芽发育.
在FHRWP的促销器区域中,染色体的可访问性与其表达和多胚胎特征有关.
FhRWP在启动体质胚胎发生方面发挥着关键作用,并为生物工程在植物再生中的应用提供了潜力.

关键词:

在FhRWP中,FhRWP是最重要的.在ATAC-seqq中使用.一个偶然的胚胎.类的类植物.植物再生植物再生

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