高度溶解氧对来自贝加尔湖的动态细菌的影响
Maria E Dmitrieva1, Ekaterina V Malygina1, Alexander Y Belyshenko1
1Laboratory of Experimental Neurophysiology, Department for Research and Development, Irkutsk State University, 1 Karl Marx Str., 664003 Irkutsk, Russia.
Metabolites
|July 29, 2023
概括
贝加尔湖的actinobacteria暴露在增加的氧气和臭氧中显示出抗氧化能力,并产生了新的天然产品. 这项研究强调了氧化应激对微生物形态学和遗传突变的影响.
科学领域:
- 微生物学 微生物学
- 生物技术是生物技术.
- 环境科学 环境科学
背景情况:
- 在氧化压力较高的高氧环境中壮成长的微生物是罕见的和未被充分研究的.
- 来自贝加尔湖沿海地区的动态细菌正在研究潜在的抗氧化剂天然产品合成.
研究的目的:
- 评估高氧和臭氧对动态细菌形态,DNA突变和抗氧化能力的影响.
- 在诱导氧化应激下探索这些微生物的生物技术潜力.
主要方法:
- 在自然和高氧/臭氧条件下培养3个月的动态细菌.
- 形态分析 (格拉姆染色),DNA突变查 (16S rRNA基因) 和抗氧化活性评估 (DPPH测试).
- 生物技术潜力的评估使用LC-MS和自然产品的复制.
主要成果:
- 至少有五种新型的天然产品是由Streptomyces sp.合成的. 只有在高氧和臭氧条件下才会产生菌株.
- 在 *Streptomyces* sp. 中观察到的形态变化. 在 * Rhodococcus * sp. 中检测到的核酸和核酸突变. 在暴露于增加的氧气和氧化应激时.
- 过高的氧气度被证明可以显著影响贝加尔湖的活性细菌.
结论:
- 增加氧气水平可以诱导贝加尔湖actinobacteria中具有抗氧化活性的天然产品的产生.
- 氧化应激影响微生物形态和遗传稳定性,为微生物适应提供了洞察力.
- 这项研究揭示了极端友善的动态细菌的生物技术潜力,用于新型化合物发现.
相关概念视频
Oxygen Requirements and Growth Patterns
161
Microorganisms exhibit diverse oxygen requirements and growth patterns driven by their metabolic strategies and environmental adaptations. Oxygen, while essential for many organisms, can also be toxic under certain conditions, shaping how microorganisms grow and survive.Oxygen Requirements of MicroorganismsMicroorganisms are classified based on their ability to use or tolerate oxygen:Obligate aerobes like Mycobacterium tuberculosis need oxygen for energy production, as it serves as the terminal...
161
Bacterial Phylum Actinobacteria
36
Coryneform bacteria are gram-positive, aerobic, nonmotile rods that exhibit irregular, club-shaped, or V-shaped arrangements. Their V-shape results from snapping division, where the inner cell wall layer forms the cross-wall, while the outer layer remains intact until it ruptures on one side, causing the daughter cells to bend away.The primary genera are Corynebacterium and Arthrobacter. Corynebacterium includes diverse species, ranging from saprophytes to pathogens like Corynebacterium...
36
Factors Influencing Microbial Growth: Osmolarity
44
Osmolarity is the measure of solute concentration in a solution. It plays a critical role in determining water availability for organisms. Water moves across semipermeable membranes through osmosis, flowing from regions of lower solute concentration (more dilute) to regions of higher solute concentration (more concentrated).In high-solute environments, microbial cells lose water, leading to dehydration and inhibited growth. The extent to which water is available to microbes in such environments...
44
Oxygen Transport in the Blood
2.8K
Hemoglobin (Hb) is a crucial molecule in the human body, consisting of four polypeptide chains, each bound to an iron-containing heme group. This unique structure enables hemoglobin to bind to oxygen, with each molecule capable of combining with four molecules of oxygen, leading to rapid and reversible oxygen loading. When fully loaded with oxygen, it is called oxyhemoglobin, while hemoglobin that has released oxygen is called reduced hemoglobin or deoxyhemoglobin. As hemoglobin binds oxygen,...
2.8K
Bacterial Phylum Cyanobacteria
44
Cyanobacteria are a diverse group of oxygenic, phototrophic bacteria that played a pivotal role in converting Earth’s atmosphere from anoxic to oxygen-rich billions of years ago. They exhibit remarkable morphological diversity, ranging from unicellular forms to filamentous types, with cell sizes varying between 0.5 μm and 100 μm. Cyanobacteria are classified into five groups: Chroococcales (unicellular, dividing by binary fission), Pleurocapsales (unicellular, dividing by...
44
Anoxygenic Phototrophic Bacteria
55
Anoxygenic phototrophic bacteria are a diverse group of microorganisms that perform photosynthesis without producing oxygen. They primarily include purple sulfur bacteria, purple nonsulfur bacteria, green sulfur bacteria, and green nonsulfur bacteria. These bacteria are classified into the Gammaproteobacteria, Alphaproteobacteria, Betaproteobacteria, Chlorobi, and Chloroflexi lineages, each with distinct physiological and ecological adaptations.Purple sulfur bacteria belong to the...
55


