温度季节性限制了土壤T4型细菌的丰富性在大空间尺度上
Yachao Zhao1,2, Xueyao Duanmu1,2, Zonghao Hu1,2
1Key Laboratory of Dryland Agriculture, Ministry of Agriculture, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
Environmental microbiome
|December 2, 2025
概括
温度季节性在全球范围内显著影响土壤T4型菌的丰富性. 这些病毒是气候变化对土壤微生物群落影响的关键指标.
科学领域:
- 环境微生物学环境微生物学
- 病毒学 病毒学
- 生物信息学是一种生物信息学.
背景情况:
- 病毒是土壤微生物动力学和生物地球化学循环的关键调节者.
- 类似T4的菌体在土壤中丰富,但它们的分布和生态驱动因素尚不清楚.
- 这项研究提供了使用元基因组数据对土壤T4样菌的首次大规模评估.
研究的目的:
- 为了研究土壤T4样菌的生物地理模式.
- 确定影响它们分布的主导环境因素.
- 在未来的气候情景下,预测它们的丰度的潜在变化.
主要方法:
- 从全球土壤元基因组和NCBI参考序列中分析病毒标志基因 (基因20和基因23).
- 遗传学分析来分类土壤衍生的病毒序列.
- 评估116个地点和14个生物群的基因相对丰度.
- 与环境因素的相关性分析,特别是温度季节性 (BIO4).
- 使用极端梯度增强 (XGBoost) 模型预测全球分布模式.
主要成果:
- 一小部分土壤序列被分配给已知的病毒家族;大多数仍然未被分类.
- 观察到一致的生物地理模式,在热带气候中丰富度较高,在极地/干旱地区水平较低.
- 温度季节性 (BIO4) 是主要的驱动因素,显示与病毒基因丰度有显著的负相关性.
- XGBoost建模预测了全球分布趋势,高温季节性地区的丰度较低.
- 未来的气候预测表明BIO4和病毒基因丰度之间存在持续的负相关性.
结论:
- 温度季节性是限制土壤T4样菌丰富的关键因素.
- 这些菌体作为气候驱动的环境变化的敏感指标.
- 土壤T4样菌在土壤微生物群落中发挥着重要的生态作用.
更多相关视频
相关概念视频
01:21Hyperthermophilic Bacteria
458
Domain Bacteria includes some unique hyperthermophilic species. They exhibit remarkable adaptations that enable survival in extreme environments.Thermotoga species are rod-shaped, gram-negative, non-sporulating hyperthermophiles that form a sheath-like envelope called a toga. They ferment sugars or starch, producing lactate, acetate, CO₂, and H₂, and can also grow via anaerobic respiration using H₂ and ferric iron. Found in hot springs and hydrothermal vents, over 20% of their...
458
01:27Factors Influencing Microbial Growth: Temperature
1.1K
Microorganisms display remarkable adaptations, enabling them to thrive in diverse ecological niches across a wide range of temperatures. Temperature profoundly influences microbial growth by affecting enzymatic activity, membrane fluidity, and other cellular processes.Each microorganism operates within a specific temperature range defined by three cardinal points: minimum, optimum, and maximum. Below the minimum temperature, membranes lose fluidity, halting transport processes. Above the...
1.1K
01:26DNA Bacteriophages
758
Bacteriophages, or phages, are viruses that specifically infect bacteria, utilizing their genetic material to hijack host cellular machinery for replication. DNA bacteriophages employ single-stranded DNA (ssDNA) or double-stranded DNA (dsDNA) genomes. These phages exhibit diverse replication strategies and host interactions, influencing their ecological roles and applications in biotechnology and medicine.ssDNA BacteriophagesssDNA phages, with their small genomes, utilize unique strategies to...
758
01:30Diversity of Archaea I
514
Archaea, a domain of single-celled microorganisms, are classified into five major phyla based on genetic and biochemical characteristics: Euryarchaeota, Crenarchaeota, Thaumarchaeota, Korarchaeota, and Nanoarchaeota. Among these, the phylum Euryarchaeota is notable for its remarkable diversity in morphology, metabolism, and ecological adaptations.Morphological and Metabolic DiversityMembers of Euryarchaeota exhibit a variety of cellular shapes, including rods and cocci. Their metabolic pathways...
514
00:43Lysogenic Cycle of Bacteriophages
67.3K
In contrast to the lytic cycle, phages infecting bacteria via the lysogenic cycle do not immediately kill their host cell. Instead, they combine their genome with the host genome, allowing the bacteria to replicate the phage DNA along with the bacterial genome. The incorporated copy of the phage genome is called the prophage. Some prophages can re-activate and enter the lytic cycle. This often occurs in response to a perturbation, such as DNA damage, but can also transpire in the absence of...
67.3K
01:16Viral Replication: Lysogenic Cycle
1.2K
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...
1.2K