Thibivilliers Sandra, Anderson Dirk, Libault Marc
Center for Plant Science Innovation, Department of Agronomy and Horticulture, Beadle Center, University of Nebraska-Lincoln, Lincoln, Nebraska.
Flow Cytometry Service Center, Center for Biotechnology, University of Nebraska-Lincoln, Lincoln, Nebraska.
Curr Protoc Plant Biol. 2020 Dec;5(4):e20120. doi: 10.1002/cppb.20120.
The characterization of the transcriptional similarities and differences existing between plant cells and cell types is important to better understand the biology of each cell composing the plant, to reveal new molecular mechanisms controlling gene activity, and to ultimately implement meaningful strategies to enhance plant cell biology. To gain a deeper understanding of the regulation of plant gene activity, the individual transcriptome of each plant cell needs to be established. Until recently, single cell approaches were mostly limited to bulk transcriptomic studies on selected cell types. Accessing specific cell types required the development of labor-intensive strategies. Recently, single cell sequencing strategies were successfully applied on isolated Arabidopsis thaliana root protoplasts. However, this strategy relies on the successful isolation of viable protoplasts upon the optimization of the enzymatic cocktails required to digest the cell wall and on the compatibility of fragile plant protoplasts with the use of microfluidic systems to generate single cell transcriptomic libraries. To overcome these difficulties, we present a simple and fast alternative strategy: the isolation and use of plant nuclei to access meaningful transcriptomic information from plant cells. This protocol was specifically developed to enable the use of the plant nuclei with 10× Genomics' Chromium technology partitions technology. Briefly, the plant nuclei are released from the root by chopping into a nuclei isolation buffer before purification by filtration then nuclei sorting. Upon sorting, the nuclei are resuspended in a low divalent ion buffer compatible with the Chromium technology in order to create single nuclei ribonucleic acid-sequencing libraries (sNucRNA-seq). © 2020 Wiley Periodicals LLC. Basic Protocol 1: Arabidopsis seed sterilization and planting Basic Protocol 2: Nuclei isolation from Arabidopsis roots Basic Protocol 3: Fluorescent-activated nuclei sorting (FANS) purification Support Protocol: Estimation of nuclei density using Countess II automated cell counter Alternate Protocol 1: Proper growth conditions for Medicago truncatula and Sorghum bicolor Alternate Protocol 2: Estimation of nuclei density using sNucRNA-seq technology.
表征植物细胞与细胞类型之间存在的转录相似性和差异,对于更好地理解构成植物的每个细胞的生物学特性、揭示控制基因活性的新分子机制以及最终实施有意义的策略来增强植物细胞生物学至关重要。为了更深入地了解植物基因活性的调控,需要建立每个植物细胞的个体转录组。直到最近,单细胞方法大多局限于对选定细胞类型的大量转录组研究。获取特定细胞类型需要开发劳动强度大的策略。最近,单细胞测序策略已成功应用于分离的拟南芥根原生质体。然而,该策略依赖于在优化消化细胞壁所需的酶混合物后成功分离有活力的原生质体,以及脆弱的植物原生质体与使用微流控系统生成单细胞转录组文库的兼容性。为了克服这些困难,我们提出了一种简单快速的替代策略:分离和使用植物细胞核以从植物细胞中获取有意义的转录组信息。该方案是专门为使植物细胞核能够与10×基因组学的铬技术分区技术一起使用而开发的。简而言之,通过切碎将植物细胞核从根中释放到细胞核分离缓冲液中,然后通过过滤进行纯化,再进行细胞核分选。分选后,将细胞核重悬于与铬技术兼容的低二价离子缓冲液中,以创建单核核糖核酸测序文库(sNucRNA-seq)。©2020威利期刊有限责任公司。基本方案1:拟南芥种子灭菌和种植 基本方案2:从拟南芥根中分离细胞核 基本方案3:荧光激活细胞核分选(FANS)纯化 支持方案:使用Countess II自动细胞计数器估计细胞核密度 替代方案1:蒺藜苜蓿和双色高粱的适宜生长条件 替代方案2:使用sNucRNA-seq技术估计细胞核密度。