Pectobacterium atrosepticumSCRI1043鞭毛介导粘附于土豆植物间接通过运动性通过运动性
Ashleigh Holmes1, Sonia Humphris1, Jacqueline Marshall1
1Cell and Molecular Sciences, James Hutton Institute, Dundee, DD2 5DA, Scotland, UK.
Microbiology (Reading, England)
|July 30, 2025
概括
对于机动性至关重要的细菌鞭毛,不介绍Pectobacterium atrosepticum最初附着于土豆根. 相反,鞭毛细胞的运动性对于Pectobacterium与其宿主植物结合至关重要.
科学领域:
- 微生物学 微生物学
- 植物病理学 植物病理学
- 细菌病原体的产生
背景情况:
- 细菌鞭对于运动性和化学反应至关重要,在宿主相互作用和免疫诱导中发挥作用.
- 旗可以促进细菌附着在植物宿主上,作为殖民因素.
- 之前的研究表明,大肠杆菌鞭毛结合植物血脂质.
研究的目的:
- 调查Pectobacterium atrosepticum flagella是否以类似于大肠杆菌的方式与土豆根结合.
- 确定P. atrosepticum flagella在植物与宿主相互作用的早期阶段的作用.
主要方法:
- 测试了P. atrosepticum旗与土豆根的结合.
- 检查了纯化鞭毛和土豆膜脂质之间的直接相互作用.
- 利用鞭毛缺陷和运动缺陷突变体来评估对鞭毛功能的结合依赖性.
主要成果:
- 包括鞭毛菌在内的P. atrosepticum鞭毛菌没有增强与土豆根结合.
- 没有观察到纯化的P. atrosepticum flagella和土豆膜脂质之间的直接相互作用.
- 马根与P. atrosepticum的结合在带有鞭毛缺陷和运动缺陷的突变体中显著减少.
结论:
- 细菌鞭毛不会作为马上的P. atrosepticum的通用附着因子.
- 鞭毛的运动功能,而不是直接的脂质结合,对于P. atrosepticum与土豆根的关联至关重要.
- 鞭毛细胞的运动性是 Pectobacterium 对易受植物宿主殖民的一个关键因素.
相关概念视频
01:28Fimbriae, Pili, and Axial Filaments
355
Fimbriae and pili are specialized bacterial surface structures that play pivotal roles in adhesion, genetic exchange, and motility. Composed primarily of pilin protein, these hairlike appendages are crucial for bacterial survival and pathogenicity in various environments.Fimbriae: Adhesion and PathogenicityFimbriae are fine, filamentous structures measuring 2–10 nanometers in diameter and are densely distributed on the bacterial cell surface. They facilitate bacterial adhesion to abiotic...
355
01:23Surface Appendages of Archaea
177
Archaeal surface appendages are highly specialized structures essential for environmental adaptation, encompassing roles in adhesion, biofilm formation, and motility. Among these appendages, pili and archaella stand out for their distinct morphologies and functionalities, enabling archaea to thrive in diverse and often extreme environments.Pili: Adhesion and Biofilm FormationPili are filamentous structures assembled from pilin protein subunits, primarily contributing to adhesion and biofilm...
177
01:14Cell Adhesion in Plants
2.9K
Plants have rigid cell walls that are made up of cell wall polysaccharides that mediate cell-cell adhesion. The primary cell walls of plants consist of two independent and interacting polysaccharide networks: a pectin matrix that embeds the second network comprising cellulose and hemicelluloses.
Pectins are complex heteropolymers mainly composed of negatively-charged α-D-glucopyranosyl uronic acid and some neutral glycosyl residues such as α-L-rhamnopyranose, α-L-arabinofuranose,...
Pectins are complex heteropolymers mainly composed of negatively-charged α-D-glucopyranosyl uronic acid and some neutral glycosyl residues such as α-L-rhamnopyranose, α-L-arabinofuranose,...
2.9K
01:39Mechanism of Filopodia Formation
2.5K
Filopodia are thin, actin-rich cellular protrusions that play an important role in many fundamental cellular functions. They vary in their occurrence, length, and positioning in different cell types, suggesting their diverse roles.
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
2.5K
01:18Flagella and Motility in Bacteria
496
Flagella are specialized, thread-like structures that extend from a bacteria's cell envelope. They play a crucial role in motility and chemotaxis. Their structural organization and functioning exemplify sophisticated biological engineering, enabling bacterial survival and adaptability in diverse environments.Structure of the FlagellumA bacterial flagellum consists of three key components: the filament, the hook, and basal body. The filament, a long, helical structure composed of repeating...
496
01:13Special Staining Techniques
327
Specialized staining techniques play a vital role in microbiology by enabling the visualization of specific bacterial structures that remain undetectable with standard microscopy methods. These techniques not only enhance the structural visualization of bacterial cells but also provide critical insights into their pathogenicity and classification. Additionally, they support diagnostic and research endeavors in microbiology by identifying key bacterial features.Capsule Staining for Virulence...
327