在环境相关的过氧化度下,由共生真菌和细菌代谢物修改的植物浮游生物的相互作用
Zhe Li1, Hua Ma1, Zhicheng Hong1
1College of Environment and Ecology, Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China.
Water research
|October 16, 2023
概括
过氧化 (H2O2) 通过影响微生物相互作用,保护Microcystis aeruginosa免受氧化压力. 它还影响毒素释放和营养循环,影响水生生态系统.
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
- 植物浮游生物的动力学
背景情况:
- 过氧化 (H2O2) 是水生生态系统的关键因素,影响微生物群落和蓝藻细菌的繁殖.
- H2O2对植物浮游生物-微生物共生相互作用的影响尚不清楚.
- 了解这些相互作用对于管理有害藻类繁殖至关重要.
研究的目的:
- 研究环境相关的H2O2度对藻类-微生物共生的影响.
- 阐明微生物在H2O2压力下调解Microcystis aeruginosa和Chlorella vulgaris之间的竞争中的作用.
- 探索H2O2对微囊素生产和营养动态的影响.
主要方法:
- 在受控水生环境中对H2O2度进行实验操纵.
- 对微生物群落组成和藻类-微生物共生中的相互作用进行分析.
- 微囊素-LR (细胞内和细胞外) 和关键代谢物的量化.
主要成果:
- 在较低的H2O2水平 (∼400nM) 上,真菌和细菌可以保护Microcystis aeruginosa免受氧化应激.
- H2O2刺激了M. aeruginosa细胞外微囊素LR的释放,但保持了稳定的细胞内水平.
- H2O2改变了代谢物概况,有机环化合物,有机酸和的损失促进了M. aeruginosa的生长,而维生素的减少则抑制了它.
结论:
- H2O2通过对微生物物种及其分泌的代谢物质的影响来调节植物浮游生物-微生物共生中的物种间关系.
- 这些发现提供了对有害藻类繁殖形成和H2O2在水生系统中的生态影响的见解.
- 该研究强调了在水生生态安全和稳定性评估中考虑H2O2的重要性.
相关概念视频
Other Algae
30
The group Stramenopiles include some phototrophic microorganisms. Members of this group possess flagella covered in numerous short, hairlike extensions, a feature that inspired the group's name, derived from the Latin words for "straw" and "hair." Some of the main categories of Stramenopiles include diatoms, golden algae, and brown algae.Diatoms are unicellular, photosynthetic eukaryotes, with over 200 known genera. They play a key role in the planktonic communities of both marine and...
30
Bacterial Phylum Cyanobacteria
27
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...
27
Anoxygenic Photosynthesis
27
Anoxygenic photosynthesis is a phototrophic process that captures light energy to drive carbon fixation without producing molecular oxygen. Unlike oxygenic photosynthesis, which utilizes water as an electron donor and releases oxygen, anoxygenic phototrophs use alternative electron donors such as hydrogen sulfide (H₂S), elemental sulfur (S⁰), or thiosulfate (S₂O₃²⁻). This process is carried out by diverse groups of bacteria, including purple bacteria, green...
27
Diversity of Protists I
21
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...
21
Anoxygenic Phototrophic Bacteria
34
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...
34
Red Algae
38
Red algae, also known as rhodophytes, are primarily found in marine environments, though some species inhabit freshwater and terrestrial ecosystems. These organisms exist in both unicellular and multicellular forms, with some multicellular varieties reaching macroscopic sizes.As phototrophic organisms, red algae contain chlorophyll a; however, their chloroplasts lack chlorophyll b. Instead, they possess phycobiliproteins, which serve as major light-harvesting pigments, similar to those found in...
38


