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Pseudomonas savastanoi
Species of bacterium From Wikipedia, the free encyclopedia
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Pseudomonas savastanoi is a gram-negative plant pathogenic bacterium that infects a variety of plants. It was once considered a pathovar of Pseudomonas syringae, but following DNA-relatedness studies, it was instated as a new species.[2] It is named after Savastano, a worker who proved between 1887 and 1898 that olive knot are caused by bacteria.[3][4]
The pathovar of greatest economical significance is Pseudomonas savastanoi pv. savastanoi, which causes the disease olive knot.[1] Symptoms include formation of galls on infected trees; tumour formation is induced by indoleacetic acid biosynthesis by the bacteria, in a similar manner to the well-studied crown gall pathogen, Agrobacterium tumefaciens.[5][6]
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History
One of the first scientists to carry out scientific and modern research on the disease of olive trees caused by Pseudomonas savastanoi (Italian: la rogna dell'ulivo) was Giuseppe Maria Giovene (1753–1837), who explained his conclusions in his publication Sulla rogna degli ulivi (1789).[7]
Pathovars
Quorum sensing
P. s. pv. s. has an unusual quorum sensing dynamic: It shares quorum with an entirely different order, the Enterobacterales.[10] Hosni et al., 2011 and Caballo-Ponce et al., 2018 find P. s. pv. s. produces very similar N-acyl homoserine lactones (AHLs) to the Erwiniaceae Erwinia toletana and Pantoea agglomerans.[10] Hosni find an avirulent mutant – defective for AHL production – is restored to virulence by the presence of E. toletana and P. agglomerans.[10] These results demonstrate disease enhancing cooperation but also reveal a possible way that undiscovered cheating may be occurring.[10]
References
External links
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