微生物金属生理学:离子对生态系统的作用
1Department of Microbiology, Cornell University, Ithaca, NY, USA. jdh9@cornell.edu.
Nature reviews. Microbiology
|July 27, 2025
概括
微生物必须管理金属离子水平才能生存,在各种环境中面临稀缺性和毒性挑战. 了解微生物金属生理学为生态系统健康,生物修复和病原体控制提供了解决方案.
科学领域:
- 微生物生理学 微生物生理学
- 环境微生物学 环境微生物学
- 生物化学 生化学
背景情况:
- 金属离子对生命至关重要,但它们的度在不同环境中存在很大差异,导致对微生物的限制或毒性.
- 微生物健康受金属的可用性影响,影响人类宿主和外部生态系统内的共生和致病物种.
- 金属平衡至关重要,需要在缺乏时有效进口,在过剩时有效出口,以防止细胞损伤.
研究的目的:
- 审查金属运输,贩运,储存和微生物监管的关键过程.
- 要突出微生物如何适应在不同的金属度的环境中生存,从有限到有毒的水平.
- 探索微生物金属生理学在生态系统管理,生物修复,生物开采和对抗细菌病原体方面的潜在应用.
主要方法:
- 关于微生物金属离子恒温的现有文献的综述.
- 分析金属监管系统及其相关规则.
- 在金属有限或金属有毒环境中繁荣的微生物的案例研究.
主要成果:
- 金属调节系统是微生物适应金属可用性波动的核心.
- 对这些系统的分析揭示了关键的运输,贩运和储存功能.
- 获得了对细胞内金属池和受金属失衡影响的过程的洞察力.
结论:
- 对微生物金属生理学的全面理解对于应对环境和健康挑战至关重要.
- 利用这些知识可以改善生态系统健康,生物修复策略和生物采矿应用.
- 准微生物的金属代谢提供了一条控制致病性细菌生长的途径.
相关概念视频
01:28Microbial Nutrition
304
Organisms exhibit remarkable metabolic diversity, categorized based on how they acquire energy and carbon. These strategies enable survival in various ecological niches and are essential for maintaining energy flow and nutrient cycling within ecosystems.Energy and Carbon SourcesOrganisms are classified as phototrophs or chemotrophs based on energy acquisition. Phototrophs use light as their energy source, while chemotrophs rely on oxidizing chemical compounds. Further differentiation arises...
304
01:15Metabolism of Chemolithotrophs
176
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
176
01:30Environmental Applications of Microorganisms
260
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
260
01:29Factors Influencing Microbial Growth: pH
223
Microorganisms are classified as acidophiles, neutrophiles, or alkaliphiles based on their pH growth preferences, reflecting their adaptations to specific environments. Maintaining a stable intracellular pH is critical for macromolecular stability and enzymatic activity, which can be challenged by external pH variations.Neutrophiles, such as Escherichia coli, grow optimally between pH 5.5 and 8.0. These microorganisms inhabit neutral or slightly acidic environments and employ mechanisms like...
223
01:27The Periodic Table and Organismal Elements
20.2K
Elements are the smallest units of matter that cannot be broken down further by chemical processes. There are 118 known elements, but not all of these are naturally occurring, and only a few of them are essential for life. Living matter is composed primarily of carbon, nitrogen, hydrogen, and oxygen, with smaller amounts of other elements like calcium, phosphorus, potassium, and sulfur. Other elements are also necessary for life but only in trace amounts.
Periodic Table Provides Information...
Periodic Table Provides Information...
20.2K
01:28Carbon-dioxide Fixation
86
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
86