在寄生虫的宿主切换后,内共生细菌的哈普洛型多样性
Bret M Boyd1, Niyomi House2,3, Ariel C Toloza4
1Center for Biological Data Science, Life Sciences, Virginia Commonwealth University, 1000 West Carry Street, Richmond, Virginia 23284.
The Journal of parasitology
|June 30, 2025
概括
吸虫依赖于内共生细菌来获得必需的B族维生素. 这项研究表明,当子殖民于新的宿主时,如黑,它们的细菌共生体保持了显著的遗传多样性,反映了与人类相关的子.
科学领域:
- 昆虫学 昆虫学是一门学科.
- 微生物学 微生物学
- 进化生物学 进化生物学
背景情况:
- 吸 (Anoplura) 取决于母亲遗传的内共生细菌来合成必需的B族维生素.
- 偶尔会殖民于新的哺乳动物宿主,但对它们的内生共生体的影响仍然不太清楚.
- 人类头,Pediculus humanus,寄生于人类和南美灵长类动物,代表了宿主殖民的模型.
研究的目的:
- 在潜在的新宿主殖民后,研究内共生细菌在吸中的基因组多样性.
- 为了比较Candidatus Riesia pediculicola从人类和黑子上的虫中的遗传构成.
主要方法:
- 对Candidatus Riesia内共生细菌的基因组分析.
- 从人类 (Homo sapiens) 和黑 (Alouatta caraya) 两种宿主中取取 Pediculus humanus 的样本.
- 与宿主相关的虫种群之间的内共生虫单元组和单元型的比较.
主要成果:
- 来自黑猿的虫的内生生物多样性涵盖了人类相关虫中发现的所有已知的半组组的一半.
- 来自子寄生的内生生物单元类型反映了同一个地区人类寄生中发现的多样性.
- 这项研究确定了不同宿主上种群之间的内共生体中显著的遗传重叠.
结论:
- 通过吸食子对新宿主进行殖民并不一定导致内生生物多样性丧失.
- 观察到的遗传多样性表明正在进行的主机切换或单一的殖民事件,涉及多样化的内生生物种群.
- 需要进行进一步的研究,以阐明P. humanus.宿主转移期间驱动内共生物多样性的精确机制.
相关概念视频
01:15Diversity of Protists I
140
Excavata is a diverse group of protists that includes both chemoorganotrophic and phototrophic species, with some thriving in anaerobic environments. Among the key groups within Excavata are diplomonads and parabasalids, which are flagellated protists that lack mitochondria and chloroplasts. These microorganisms typically inhabit anoxic environments, such as the intestines of animals, where they exist either symbiotically or as parasites, relying on fermentation for energy production. Some...
140
01:27Diversity of Protists II
149
Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
149
01:27Diversity of Protists III
139
Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
139
01:16Viral Replication: Lysogenic Cycle
272
The lysogenic cycle is a crucial viral replication strategy that allows bacteriophages to persist within host cells without immediately destroying them. This process is primarily observed in temperate phages, such as bacteriophage lambda (λ), which infects Escherichia coli. The cycle allows the viral genome to persist across bacterial generations while keeping host cells viable.Integration of the Viral GenomeUpon infection, bacteriophage lambda attaches to the bacterial surface and injects...
272
01:19Conjugation
99
Conjugation is a form of horizontal gene transfer that primarily occurs in bacteria and some archaea, promoting genetic diversity and adaptation. Bacteria can acquire resistance genes through conjugative plasmids, allowing them to survive antibiotic treatments that would otherwise be lethal. This process involves direct contact between cells through specialized structures such as the sex pilus and is mediated by conjugative plasmids, including the F (fertility) factor.Conjugation requires...
99
01:27Horizontal Gene Transfer
155
Horizontal gene transfer (HGT) is a process where genetic material moves between organisms within the same generation, unlike vertical gene transfer, which occurs from parent to offspring. HGT plays a crucial role in microbial evolution, adaptation, and survival, particularly in shared environments like the human gut.Mobile genetic elements such as plasmids, prophages, integrons, insertion sequences, and transposons facilitate this process. HGT occurs through three primary mechanisms:...
155