Fatty Acid Composition of Pseudomonas syringae pv. <i>savastanoi</i>

Wells, John M.; Casano, F. J.; Surico, G.

doi:10.1111/j.1439-0434.1991.tb00148.x

Cited by 10 publications

(1 citation statement)

References 19 publications

(19 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…fraxini , respectively (Young et al ., 1996). The above classification reflects accurately the differences among the oleander, olive and ash strains of the pathogen in pathogenicity, phytohormone production, sugar metabolism (Wilson et al ., 1972), fatty acid profiles (Varvaro & Sasser, 1987; Janse, 1991; Wells et al ., 1991), DNA fingerprints (Mugnai et al ., 1994) and bacteriocin production (Iacobellis et al ., 1995).…”

Section: Discussionmentioning

confidence: 99%

Characterization of Pseudomonas syringae ssp. savastanoi strains isolated from ash

1998

View full text Add to dashboard Cite

Isolates of Pseudomonas syringae ssp. savastanoi from ash were examined for their ability to produce phytohormones in culture and for pathogenicity, in comparison with isolates from olive and oleander. Nineteen out of 20 ash isolates produced low levels of indole-3-acetic acid and its methyl ester but no cytokinins. In contrast, the remaining isolate, NCPPB3474, accumulated high levels of auxins and cytokinins in culture, comparable to those of olive and oleander strains. Hybridization of DNA preparations with tryptophan mono-oxygenase (iaaM) and isopentenyl transferase (ipt) gene-containing probes showed sequences of DNA homologous to both probes only in isolate NCPPB3474, and in which the iaaM and ipt genes were located on the chromosome and on a plasmid of about 80 kb, respectively. When assayed for pathogenicity on ash, olive and oleander, 19 of the 20 ash isolates caused disease only on ash but NCPPB3474 caused knots on both ash and olive. Oleander isolates infected all three hosts whereas those from olive caused symptoms only on olive and ash. All the cultures were able to multiply in host plant tissues, but the growth rates and final population densities were correlated to the plant species inoculated and the host origin of the isolates. In particular, the highest population densities were reached by isolates capable of causing symptoms on the inoculated host. The phytohormone production shown by ash, olive and oleander isolates of P. syringae ssp. savastanoi was in accordance with the type of symptoms: cankers accompanied by wart-like excrescences on ash and knots on olive and oleander. Furthermore, the pathogenic features of these isolates and, in particular, their growth patterns in the different host tissues, support previous evidence on the existence of three distinct pathovars in P. syringae ssp. savastanoi.

show abstract

Section: Discussionmentioning

confidence: 99%

Characterization of Pseudomonas syringae ssp. savastanoi strains isolated from ash

1998

View full text Add to dashboard Cite

show abstract

Diversity of auxin‐producing bacteria associated to Pseudomonas savastanoi ‐induced olive knots

Ouzari

Khsairi

Raddadi

et al. 2008

J. Basic Microbiol.

View full text Add to dashboard Cite

Forty three strains were isolated from knots induced by Pseudomonas savastanoi in different olive cultivars. All the selected bacteria were shown to produce variable amounts of the plant growth hormone indole-3-acetic acid (IAA). Amplification of the intergenic transcribed spacers (ITS) between 16S and 23S rDNA genes, allowed the clustering of the isolates into seven distinct groups. All isolates from ITS group 1 were positive to the Pseudomonas savastanoi pv. savastanoi specific iaa L gene as shown by PCR. Partial sequencing of 16S rDNA gene confirmed the identity of these isolates to Pseudomonas savastanoi strains and allowed to tentatively assign the other isolates from the remaining ITS groups to Pantoea oleae/agglomerans, Burkholderia cepacia, Pseudomonas putida, Stenotrophomonas maltophilia and Hafnia alvei. Identification of endophytic knot-derived isolates revealed association of various saprophytic and putative human pathogenic bacteria with P. savastanoi pv. savastanoi in knot environment of olive infected trees.

show abstract

Pseudomonas syringae pathovars

Rudolph¹

1995

Prokaryotes

View full text Add to dashboard Cite

Fatty Acid Composition of Pseudomonas syringae pv. savastanoi

Cited by 10 publications

References 19 publications

Characterization of Pseudomonas syringae ssp. savastanoi strains isolated from ash

Characterization of Pseudomonas syringae ssp. savastanoi strains isolated from ash

Diversity of auxin‐producing bacteria associated to Pseudomonas savastanoi ‐induced olive knots

Pseudomonas syringae pathovars

Contact Info

Product

Resources

About