一种死毒素可以使Pseudomonas syringae在进化分歧的植物中感染
Kristina Grenz1, Khong-Sam Chia1, Emma K Turley1
1Cell and Developmental Biology, John Innes Centre, Norwich NR4 7UH, UK.
Cell host & microbe
|December 20, 2024
概括
Pseudomonas syringae使用植物毒素syringomycin和类型-3效应剂来感染广泛的植物,包括古老的血统,如肝炎和. 这种毒素对细菌殖民和各种植物宿主中疾病的发展至关重要.
科学领域:
- 植物病理学 植物病理学
- 细菌学 细菌学是一门学科.
- 进化生物学是进化的生物学.
背景情况:
- 类型复杂的Pseudomonas syringae包括具有广泛宿主范围的植物病原体,但知识仅限于开花植物.
- 了解跨不同植物系的病原体进化对于全面了解植物微生物相互作用至关重要.
研究的目的:
- 在进化分歧的植物中研究Pseudomonas syringae的感染机制.
- 为了比较P. syringae在肝,和开花植物中的病原性.
主要方法:
- 鉴定P. syringae分离物导致Marchantia polymorpha (肝),Ceratopteris richardii () 和Nicotiana benthamiana (开花植物) 的疾病.
- 分析3型因子和植物毒素syringomycin在毒性中的作用.
- 评估外宫内注射菌对组织亡,基因表达和细菌生长的影响.
主要成果:
- 富含植物毒素的第2族群 (PG2) P. syringae分离物在非开花植物中具有毒性,利用3型效应物和syringomycin.
- 氨酸促进组织亡,激活保存的与压力相关的基因,并增强Marchantia中的细菌生长.
- 糖甘氨酸在广泛的陆地植物中扮演着Pseudomonas殖民的关键角色.
结论:
- 赛灵素是P. syringae的关键毒性因子,可以对各种陆地植物产生敌对作用.
- 施菌素和效应剂的联合作用是P. syringae广泛的宿主范围的基础.
- 这项研究扩大了我们对植物 - 细菌相互作用的理解,超越了开花植物,到古代植物谱系.
相关概念视频
01:28Gene Regulation in Microbial Communities: Quorum Sensing
1
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,...
1
02:26Defenses Against Pathogens and Herbivores
23.1K
Plants present a rich source of nutrients for many organisms, making it a target for herbivores and infectious agents. Plants, though lacking a proper immune system, have developed an array of constitutive and inducible defenses to fend off these attacks.
23.1K
01:16Necrosis
4.3K
Necrosis is considered as an “accidental” or unexpected form of cell death that ends in cell lysis. The first noticeable mention of “necrosis” was in 1859 when Rudolf Virchow used this term to describe advanced tissue breakdown in his compilation titled “Cell Pathology”.
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become...
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become...
4.3K
02:11The Roles of Bacteria and Fungi in Plant Nutrition
35.0K
Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.
35.0K
02:40Epiphytes, Parasites, and Carnivores
12.9K
Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the...
12.9K
02:50Transgenic Plants
7.1K
Recombinant DNA technology called transgenesis is often used to add a foreign gene or remove a detrimental gene from an organism. Such genetically modified organisms are called transgenic organisms.
The first-ever transgenic plant was a tobacco plant developed in 1983 that showed resistance against the tobacco mosaic virus. Since then, many transgenic plants have been developed and commercialized for improving the agricultural, ornamental, and horticultural value of a crop plant. Transgenic...
The first-ever transgenic plant was a tobacco plant developed in 1983 that showed resistance against the tobacco mosaic virus. Since then, many transgenic plants have been developed and commercialized for improving the agricultural, ornamental, and horticultural value of a crop plant. Transgenic...
7.1K