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Pseudomonas syringae is a rod-shaped, Gram-negative bacterium with polar flagella.As a plant pathogen, it can infect a wide range of species, and exists as over 50 different pathovars, [2] all of which are available to researchers from international culture collections such as the NCPPB, ICMP, and others.
Pseudomonas syringae pv. glycinea accomplishes this by using the type three secretion system to inject a variety of pathogenicity effector proteins (Hrp proteins) into the plant cell cytoplasm. [11] These proteins act by interfering with effector-triggered immunity and producing phytohormones /toxins that suppress plant defenses. [ 11 ]
P. syringae is a prolific plant pathogen. It exists as over 50 different pathovars, many of which demonstrate a high degree of host-plant specificity. Numerous other Pseudomonas species can act as plant pathogens, notably all of the other members of the P. syringae subgroup, but P. syringae is the most widespread and best-studied. [citation needed]
Halo blight of bean is a bacterial disease caused by Pseudomonas syringae pv. phaseolicola. Halo blight’s pathogen is a gram-negative, aerobic, polar-flagellated and non-spore forming bacteria. This bacterial disease was first discovered in the early 1920s, and rapidly became the major disease of beans throughout the world.
Pseudomonas syringae pv. Aesculi is a bacterium that causes bleeding canker of horse chestnut. The pathogen overwinters in the soil and can survive in the soil for about a year. [2] It is spread by water, rain, and tools that were used on the infected tree. [3] It causes lesions on the bark of the tree that can be near the base of the trunk or ...
A spectrum of hemibiotrophic plant pathogens, including the bacterium Pseudomonas syringae and the oomycete Phytophthora infestans (potato blight), also exhibit characteristics of both biotrophs and necrotrophs and thus are called hemibiotrophs, depending on the stages of their life cycle. [citation needed]
Several pathovars of Pseudomonas syringae have been sequenced, including pathovar tomato DC3000 (2003), pathovar syringae B728a (2005), and pathovar phaseolica 1448A (2005). [ 3 ] Distinguishing characteristics
Pseudomonas andropogonis. Chocolate spot: Pseudomonas syringae pv. coronafaciens. Goss's bacterial wilt and blight (leaf freckles and wilt) [1] Clavibacter michiganensis subsp. nebraskensis [2] = Corynebacterium michiganense pv. nebraskense. Holcus spot: Pseudomonas syringae pv. syringae van Hall. Purple leaf sheath: Hemiparasitic bacteria ...