''Pseudomonas coronafaciens'' is a

Gram-negative bacterium Gram-negative bacteria are bacteria that, unlike gram-positive bacteria, do not retain the crystal violet stain used in the Gram staining method of bacterial differentiation. Their defining characteristic is that their cell envelope consists of ...

that is pathogenic to several plant species. Following ribotypical analysis several

pathovar A pathovar is a bacterial strain or set of strains with the same or similar characteristics, that is differentiated at infrasubspecific level from other strains of the same species or subspecies on the basis of distinctive pathogenicity to one o ...

s of '' P. syringae'' were incorporated into this species.

Hosts

* ''Pseudomonas coronafaciens'' pv. ' is pathogenic on Italian ryegrass (''

Lolium multiflorum ''Lolium multiflorum'' (Italian rye-grass, annual ryegrass) is a ryegrass native to temperate Europe, though its precise native range is unknown. It is a herbaceous annual, biennial, or perennial grass that is grown for silage, and as a cover ...

'', syn. ''Festuca perennis''). * ''Pseudomonas coronafaciens'' pv. ' causes halo blight on oat (''

Avena sativa The oat (''Avena sativa''), sometimes called the common oat, is a species of cereal grain grown for its seed, which is known by the same name (usually in the plural). Oats appear to have been domesticated as a secondary crop, as their seeds ...

''). * ''Pseudomonas coronafaciens'' pv. ' infects the coffee plant ''

Coffea arabica ''Coffea arabica'' (), also known as the Arabica coffee, is a species of flowering plant in the coffee and madder family Rubiaceae. It is believed to be the first species of coffee to have been cultivated and is the dominant cultivar, represe ...

''. * ''Pseudomonas coronafaciens'' pv. ' is pathogenic on rice (''

Oryza sativa ''Oryza sativa'', having the common name Asian cultivated rice, is the much more common of the two rice species cultivated as a cereal, the other species being ''Oryza glaberrima, O. glaberrima'', African rice. It was History of rice cultivation ...

''). * ''Pseudomonas coronafaciens'' pv. ' infects the

leek A leek is a vegetable, a cultivar of ''Allium ampeloprasum'', the broadleaf wild leek (synonym (taxonomy), syn. ''Allium porrum''). The edible part of the plant is a bundle of Leaf sheath, leaf sheaths that is sometimes erroneously called a "s ...

( ''Allium ampeloprasum'' var. ''porrum''). * ''Pseudomonas coronafaciens'' pv. ' causes bacterial stripe blight on oat (''

''). * ''Pseudomonas coronafaciens'' pv. ' causes bacterial leaf streak on wild rice (''

Zizania aquatica Wild rice, also called manoomin, mnomen, psíŋ, Canada rice, Indian rice, or water oats, is any of four species of Poaceae, grasses that form the genus ''Zizania'', and the grain that can be harvested from them. The grain was historically an ...

'').

Pathogenesis

''P. coronafaciens'' performs

quorum sensing In biology, quorum sensing or quorum signaling (QS) is the process of cell-to-cell communication that allows bacteria to detect and respond to cell population density by gene regulation, typically as a means of acclimating to environmental disadv ...

by way of acylhomoserine lactone compounds. Cha ''et al.'', 1998 and Dumenyo ''et al.'', 1998 isolate and characterize some of these.

References

Pseudomonadales Bacterial plant pathogens and diseases Oats diseases Coffee diseases Rice diseases Root vegetable diseases Bacteria described in 1920 {{Pseudomonadales-stub