Pseudomonas syringae pathovars

Rudolph, K.

doi:10.1016/b978-0-08-042510-8.50010-8

Cited by 22 publications

(17 citation statements)

References 439 publications

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“…However, the production of phaseolotoxin is considered a defining characteristic of P. syringae pv. phaseolicola and strains unable to synthesize it are only rarely reported (Rudolph, 1995;Schaad et al, 1995;Völksch & Weingart, 1998;Marques et al, 2000), suggesting that the production of phaseolotoxin, or the activity of other gene(s) that might have been co-transferred with the argK-tox gene cluster, could confer an important selective advantage.…”

Section: Discussionmentioning

confidence: 99%

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Pseudomonas syringae pv. phaseolicola can be separated into two genetic lineages distinguished by the possession of the phaseolotoxin biosynthetic cluster

Oguiza

Rivas

Sutra³

et al. 2004

Microbiology

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The bean (Phaseolus spp.) plant pathogen Pseudomonas syringae pv. phaseolicola is characterized by the ability to produce phaseolotoxin (Tox + ). We recently reported that the majority of the Spanish P. syringae pv. phaseolicola population is unable to synthesize this toxin (Tox " ). These Tox " isolates appear to lack the entire DNA region for the biosynthesis of phaseolotoxin (argK-tox gene cluster), as shown by PCR amplification and DNA hybridization using DNA sequences specific for separated genes of this cluster. Tox + and Tox " isolates also showed genomic divergence that included differences in ERIC-PCR and arbitrarily primed-PCR profiles. Tox + isolates showed distinct patterns of IS801 genomic insertions and contained a chromosomal IS801 insertion that was absent from Tox " isolates. Using a heteroduplex mobility assay, sequence differences were observed only among the intergenic transcribed spacer of the five rDNA operons of the Tox " isolates. The techniques used allowed the unequivocal differentiation of isolates of P. syringae pv. phaseolicola from the closely related soybean (Glycine max) pathogen, P. syringae pv. glycinea. Finally, a pathogenicity island that is essential for the pathogenicity of P. syringae pv. phaseolicola on beans appears to be conserved among Tox + , but not among Tox " isolates, which also lacked the characteristic large plasmid that carries this pathogenicity island. It is proposed that the results presented here justify the separation of the Tox + and Tox " P. syringae pv. phaseolicola isolates into two distinct genetic lineages, designated Pph1 and Pph2, respectively, that show relevant genomic differences that include the pathogenicity gene complement.

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Section: Discussionmentioning

confidence: 99%

“…phaseolicola are reported to be Tox + and naturally occurring isolates unable to synthesize phaseolotoxin (Tox 2 isolates), which usually possess the corresponding argK-tox gene cluster region, are rare (Rudolph, 1995;Schaad et al, 1995). We reported recently, however, that over 60 % of the Spanish field isolates of P. syringae pv.…”

Section: Introductionmentioning

confidence: 99%

Pseudomonas syringae pv. phaseolicola can be separated into two genetic lineages distinguished by the possession of the phaseolotoxin biosynthetic cluster

Oguiza

Rivas

Sutra³

et al. 2004

Microbiology

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“…syringae is considered unique among P. syringae pathovars for its ability to cause disease in at least 180 plant species from several unrelated genera [17]. Diseases caused by this bacterium, although classified as of low importance [15], have decreased yield by over 50% in Germany [18]. Maximum damage is usually associated with conditions of high humidity and low temperature [15].…”

Section: Importance Of Wheat Diseasesmentioning

confidence: 99%

“…Diseases caused by this bacterium, although classified as of low importance [15], have decreased yield by over 50% in Germany [18]. Maximum damage is usually associated with conditions of high humidity and low temperature [15]. The bacterium first infects the glumes, lemma, palea, and caryopsis and then invades and multiplies in the intercellular spaces of the seed tissues [19].…”

Section: Importance Of Wheat Diseasesmentioning

confidence: 99%

“…The incidence of Pseudomonas syringae pv. syringae tends to be sporadic and their geographical distribution is limited [14][15][16]. Studies on the bacterial diseases of wheat are scarce, so only limited quantitative information on, for example, yield loss and disease epidemiology is available, especially under field conditions.…”

Section: Importance Of Wheat Diseasesmentioning

confidence: 99%

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A Review of the Studies and Interactions ofPseudomonas syringaePathovars on Wheat

Valencia-Botín

Cisneros-López

2012

International Journal of Agronomy

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Wheat is affected by some pathovars ofPseudomonas syringaeand by otherPseudomonasspecies. Of these,P. syringaepv.syringaeis the major one responsible for reduction. Recent studies have been made to characterize and identify the pathogen and to determine its aggressiveness and the pattern of colonization in seed and its effects on seed yield, yield components, and source-sink relationships during postanthesis. It was found that the reduction in the aerial biomass production is the best way to evaluate the aggressiveness of this bacterium, and the spray inoculation is good tool to make evaluations at seedling stage. The characterization of bacteria fingerprintings with molecular markers such as RAPD-PCR, ERIC, and REP-PCR is available. Genomic evolution has been elucidated with next-generation genome sequencing. Also, the colonization pattern shows that, early on, microcolonies are frequently detected in the aleurone layer, later in the endosperm and finally close to the crease and even in some cells of the embryo itself. In the wheat cultivars Seri M82 and Rebeca F2000 seed yield and its components are negatively affected. In general,P. syringaepv.syringaereduces the plant height, seed yield, and yield components, as well as the growth of most organs. When this bacterium attacks, the stems are the predominant sink organs and the leaf laminae and panicles are the predominant source organs.

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Limitations of the Current Methods for the Detection of Spanish Strains of Pseudomonas syringae pv. phaseolicola

Lopez

Aizpún

Asensio

et al. 2003

Pseudomonas Syringae and Related Pathogens

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Pseudomonas syringae pathovars

Cited by 22 publications

References 439 publications

Pseudomonas syringae pv. phaseolicola can be separated into two genetic lineages distinguished by the possession of the phaseolotoxin biosynthetic cluster

Pseudomonas syringae pv. phaseolicola can be separated into two genetic lineages distinguished by the possession of the phaseolotoxin biosynthetic cluster

A Review of the Studies and Interactions ofPseudomonas syringaePathovars on Wheat

Limitations of the Current Methods for the Detection of Spanish Strains of Pseudomonas syringae pv. phaseolicola

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