''Erwinia psidii'' is a

Gram-negative Gram-negative bacteria are bacteria that do not retain the crystal violet stain used in the Gram staining method of bacterial differentiation. They are characterized by their cell envelopes, which are composed of a thin peptidoglycan cell wa ...

bacterium Bacteria (; singular: bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were amon ...

and a phytopathogen of the common guava (''

Psidium guajava ''Psidium guajava'', the common guava, yellow guava, lemon guava, or apple guava is an evergreen shrub or small tree native to the Caribbean, Central America and South America. It is easily pollinated by insects; when cultivated, it is polli ...

''), causing rot in branches, flowers and fruits. Recently, it was demonstrated that this species produces two acyl homoserine lactones (''S''-(-)-N-hexanoyl- and N-heptanoyl-homoserine lactone), widely recognized bacterial

quorum sensing In biology, quorum sensing or quorum signalling (QS) is the ability to detect and respond to cell population density by gene regulation. As one example, QS enables bacteria to restrict the expression of specific genes to the high cell densities at ...

signaling substances, and employed in bacterial cell-to-cell communication systems.

References

External links

Type strain of ''Erwinia psidii'' at Bac''Dive'' - the Bacterial Diversity Metadatabase
Bacterial plant pathogens and diseases Bacteria described in 1988 Enterobacterales {{plant-disease-stub