单细胞分辨率下水稻茎尖分生组织的全组织三维免疫染色

IF 5.7 1区 生物学 Q1 PLANT SCIENCES
Yurika Morishita, Ryosuke Takata, Asuka Higo, Aya Yoshida, Hiroyuki Tsuji
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引用次数: 0

摘要

茎尖分生组织(shoot apical merisystem, SAM)产生植物的所有地上器官,因此是植物发育生物学的中心焦点。SAM的发育过程受多种因素的调控,这些因素在细胞水平上控制基因表达。其中的关键是组蛋白n端尾部的化学修饰,组蛋白是核小体和染色质的重要组成部分,在这些过程中起着至关重要的作用。虽然免疫染色是一种有价值的组蛋白修饰空间分析方法,但它在SAM中的应用带来了技术挑战。在这里,我们开发了一种单细胞分辨率的水稻(Oryza sativa) SAMs三维免疫染色方法,使用特定细胞壁降解酶的渗透过程,以及iTOMEI清除技术(Sakamoto等人[2022]通讯生物学,5,12)。我们在整个深层组织层中检测到清晰的信号,使我们能够可视化与活性和抑制染色质状态相关的组蛋白修饰,以及定位于染色体上的M期特异性修饰。抑制修饰H3K9me2和H3K27me3在细胞核内呈点状分布,而与转录活性相关的修饰则更为弥散分布。双染色显示H3K9me2在富含H3K4me1的中心结构域周围形成外周层。对营养期和生殖期SAMs的比较分析表明,主动修饰在两个阶段都持续存在,而压抑修饰在生殖期增加。我们的方案促进了SAM中染色质状态的三维可视化,为在单细胞水平上探索植物发育的空间调控提供了一个强大的工具。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Whole-tissue 3D immunostaining of shoot apical meristems in rice at single-cell resolution

The shoot apical meristem (SAM) produces all above-ground organs of plants and is thus a central focus of plant developmental biology. Developmental processes in the SAM are regulated by various factors that control gene expression at the cellular level. Key among these are the chemical modifications of the N-terminal tails of histones, which are essential components of nucleosomes and chromatin that play crucial roles in these processes. While immunostaining is a valuable method for the spatial analysis of histone modifications, its application to the SAM has posed technical challenges. Here, we developed a three-dimensional immunostaining method for rice (Oryza sativa) SAMs at single-cell resolution using a permeabilization process with specific cell wall degrading enzymes, along with the iTOMEI clearing technique (Sakamoto et al. [2022] Communications Biology, 5, 12). We detected clear signals throughout the deeper tissue layers, allowing us to visualize histone modifications associated with both active and repressive chromatin states, as well as M phase–specific modifications localized on chromosomes. The repressive modifications H3K9me2 and H3K27me3 exhibited punctate patterns within the nuclei, whereas the modifications linked to transcriptional activity were more diffusely distributed. Double staining showed that H3K9me2 forms a peripheral layer around a central domain enriched in H3K4me1. A comparative analysis of SAMs during the vegetative and reproductive phases indicated that active modifications persisted across both phases, whereas repressive modifications increased during the reproductive phase. Our protocol facilitates the three-dimensional visualization of chromatin states in the SAM, offering a robust tool for exploring the spatial regulation of plant development at the single-cell level.

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来源期刊
The Plant Journal
The Plant Journal 生物-植物科学
CiteScore
13.10
自引率
4.20%
发文量
415
审稿时长
2.3 months
期刊介绍: Publishing the best original research papers in all key areas of modern plant biology from the world"s leading laboratories, The Plant Journal provides a dynamic forum for this ever growing international research community. Plant science research is now at the forefront of research in the biological sciences, with breakthroughs in our understanding of fundamental processes in plants matching those in other organisms. The impact of molecular genetics and the availability of model and crop species can be seen in all aspects of plant biology. For publication in The Plant Journal the research must provide a highly significant new contribution to our understanding of plants and be of general interest to the plant science community.
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