解开疾病抑制的分子机制由内菌的Flavobacterium sp. 第九百九十八章 没有了
Xinya Pan1, Somayah S Elsayed2, Gilles P van Wezel1
1Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, Netherlands; Institute of Biology, Leiden University, Leiden, Netherlands.
Microbiological research
|December 12, 2025
概括
内生菌体内生菌体内生菌体内生菌体内生菌体内生菌体内生菌体内生菌体 Flavobacterium sp. 98通过产生抗真菌化合物5,6-二甲基胺醇 (DMB) 来保护甜菜免受真菌病原体的影响. 这种保护是由生物合成基因集群298 (BGC298) 和DMB合成基因bluB.BluB.介导的.
科学领域:
- 微生物生态学 微生物生态学
- 植物病理学 植物病理学
- 生物化学 生物化学
背景情况:
- 内生菌微生物增强了植物对病原体的抵抗力.
- 固体植物性 菌 (Flavobacterium sp.) 的一种. 98 (Fl98) 曾经通过生物合成基因集群298 (BGC298) 对Rhizoctonia solani进行过保护.
- 这种保护的精确分子机制尚未完全理解.
研究的目的:
- 阐明Fl98保护甜菜免受R. solani.感染的分子机制.
- 研究BGC298在抗真菌化合物的生物合成中的作用.
- 确定DMB生物合成对抑制植物疾病的贡献.
主要方法:
- 对Fl98及其突变的比较代谢分析.
- 在DMB合成基因 (bluB) 的位点定向突变发生.
- 温室生物测试以评估植物保护的有效性.
- 基因分布的生物信息分析.
主要成果:
- 在Fl98中BGC298的淘汰导致5,6-二甲基胺醇 (DMB) 的产量减少.
- 蓝B基因的突变性取消了DMB的产生.
- 无论是 ΔBGC298 还是 ΔbluB 突变,都显示出对甜菜苗的保护受到损害.
- BGC298是特定于某些与植物相关的Flavobacterium菌株的,而bluB是广泛的.
结论:
- BGC298在Fl98.8中调节DMB生物合成方面发挥着至关重要的作用.
- 由BGC298和bluB监管的DMB生产,对于Fl98对糖根腐烂的保护作用至关重要.
- 这项研究揭示了一种由内菌媒介的植物保护的新机制.
相关概念视频
Gene Regulation in Microbial Communities: Quorum Sensing
463
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,...
463
Biological Methods for Microbial Control
758
Biological agents offer an effective means of controlling microbial growth by leveraging natural processes like predation, competition, and the secretion of antimicrobial substances.Predatory bacteria such as Bdellovibrio species target and kill pathogens like Salmonella and E. coli. They are widely used in poultry farms to control infections. Myxococcus species help combat plant-pathogenic fungi. These naturally occurring predators serve as eco-friendly alternatives to chemical pesticides and...
758
Defense Against Bacterial Pathogens
2.6K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
2.6K
Gene Regulation During Sporulation
402
Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
402


