Pseudomonas coronafaciens is a Gram-negative

Gram-negative

Gram-negative bacteria are bacteria that do not retain crystal violet dye in the Gram staining protocol. In a Gram stain test, a counterstain is added after the crystal violet, coloring all Gram-negative bacteria with a red or pink color...

 bacterium that is pathogenic to several plant

Plant

Plants are living organisms belonging to the kingdom Plantae. Precise definitions of the kingdom vary, but as the term is used here, plants include familiar organisms such as trees, flowers, herbs, bushes, grasses, vines, ferns, mosses, and green algae. The group is also called green plants or...

 species. Following ribotypical analysis

Ribotyping

Ribotyping involves the fingerprinting of genomic DNA restriction fragments that contain all or part of the genes coding for the 16S and 23S rRNA. Conceptually, ribotyping is similar to probing restriction fragments of chromosomal DNA with cloned probes ....

 several pathovars of Pseudomonas syringae were incorporated into this species.

Pathogenesis

Pseudomonas coronafaciens pv. atropurpurea is pathogenic on Italian ryegrass

Ryegrass

Ryegrass is a genus of nine species of tufted grasses in the Pooideae subfamily of the Poaceae family. Also called tares , these plants are native to Europe, Asia and northern Africa, but are...

 (Lolium multiflorum).

Pseudomonas coronafaciens pv. coronafaciens causes halo blight on oat

Oat

The common oat is a species of cereal grain grown for its seed, which is known by the same name . While oats are suitable for human consumption as oatmeal and rolled oats, one of the most common uses is as livestock feed...

 (Avena sativa).

Pseudomonas coronafaciens pv. garcae infects the coffee plant Coffea arabica

Coffea arabica

Coffea arabica is a species of Coffea originally indigenous to the mountains of Yemen in the Arabian Peninsula, hence its name, and also from the southwestern highlands of Ethiopia and southeastern Sudan. It is also known as the "coffee shrub of Arabia", "mountain coffee" or "arabica coffee"...

.

Pseudomonas coronafaciens pv. oryzae is pathogenic on rice (Oryza sativa

Oryza sativa

Oryza sativa, commonly known as Asian rice, is the plant species most commonly referred to in English as rice. Oryza sativa is the cereal with the smallest genome, consisting of just 430Mb across 12 chromosomes...

).

Pseudomonas coronafaciens pv. porri infects the leek

Leek

The leek, Allium ampeloprasum var. porrum , also sometimes known as Allium porrum, is a vegetable which belongs, along with the onion and garlic, to family Amaryllidaceae, subfamily Allioideae...

 (Allium ampeloprasum

Allium ampeloprasum

Allium ampeloprasum is a member of the onion genus Allium. The wild plant is commonly known as Wild Leek - not to be confused with the N. American Allium tricoccum of the same name. Its native range is S. Europe to W...

var. porrum).

Pseudomonas coronafaciens pv. striafaciens causes bacterial stripe blight on oat

Oat

The common oat is a species of cereal grain grown for its seed, which is known by the same name . While oats are suitable for human consumption as oatmeal and rolled oats, one of the most common uses is as livestock feed...

 (Avena sativa).

Pseudomonas coronafaciens pv. zizaniae causes bacterial leaf streak on wild rice

Wild rice

Wild rice is four species of grasses forming the genus Zizania, and the grain which can be harvested from them. The grain was historically gathered and eaten in both North America and China...

 (Zizania aquatica).