在微藻-细菌颗粒污泥中的双向作用:增强信号通信,以实现高效的新陈代谢
Renhui Wan1, Fan Mo1, Leyan Chen1
1Faculty of Resources and Environmental Science, Hubei University, Wuhan 430062, PR China.
Bioresource technology
|November 28, 2024
概括
通过改善细菌的定数感应和微藻光合作用来增强微藻-细菌颗粒污泥 (MBGS) 系统. 最佳含量至关重要,因为缺乏和过量都会对MBGS的稳定性产生负面影响.
科学领域:
- 环境微生物学 环境微生物学
- 水生生态学 水生生态学
- 生物技术是生物技术.
背景情况:
- 在藻类和细菌新陈代谢中起着至关重要的作用.
- 微藻-细菌颗粒污泥 (MBGS) 系统依赖于协同相互作用.
- 了解微量营养素对MBGS稳定性的影响对于废水处理至关重要.
研究的目的:
- 研究对微藻-细菌颗粒污泥 (MBGS) 系统的影响.
- 为了确定MBGS性能的最佳度.
- 阐明对微生物交流和污泥稳定性的影响机制.
主要方法:
- 在MBGS中对度的实验操纵.
- 自动诱导剂-2 (细菌定数感应信号) 和英多尔-3-酸 (微藻代谢物) 的量化.
- 测量细胞外聚合物质 (EPS) 生产和光合作用效率.
- 对微生物群落组成的分析,重点关注叶绿植物和菌的丰富性.
主要成果:
- 添加刺激了细菌通过自动诱导器-2的定数感应,使EPS产量增加了超过12.5%.
- 显著影响了微藻类的英多尔-3-酸水平,提高了光合作用效率.
- 发现最佳度为80μM;缺乏和过量导致氧化应激并降低了MBGS的稳定性.
- 增加了叶绿植物 (0.23倍) 和菌 (0.88倍) 的丰富度.
结论:
- 对于通过影响藻类和细菌信号通信来加强MBGS内部的协同作用关系至关重要.
- 保持最佳水平对于MBGS在废水处理中的稳定性和性能至关重要.
- 这项研究为优化在共生微生物系统中微量营养素应用提供了理论基础.
相关概念视频
01:15Metabolism of Chemolithotrophs
2
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.
2
01:30Bacterial Signaling
31.5K
Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
31.5K
01:21Green Algae
Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...
01:30Environmental Applications of Microorganisms
2
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...
2
00:46Bioremediation
18.2K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.2K
01:28Gene Regulation in Microbial Communities: Quorum Sensing
3
Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
3