Characteristics of Strains of<i>Pseudomonas solanacearum</i>from China

He, Lei; Sequeira, Luís; Kelman, A.

doi:10.1094/pd-67-1357

Cited by 254 publications

(196 citation statements)

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“…The remaining strains were organized in two clonal complexes, both displaying short branches (Figure 3) (He et al, 1983) and strains from China (337, 339), and other clonal lines. Phylotype III contained strains all sampled from Africa.…”

Section: Evolutionary History Of Ralstonia Solanacearummentioning

confidence: 99%

Contrasting recombination patterns and demographic histories of the plant pathogen Ralstonia solanacearum inferred from MLSA

et al. 2011

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We used multilocus sequence analysis (MLSA) on a worldwide collection of the plant pathogenic Ralstonia solanacearum (Betaproteobacteria) to retrace its complex evolutionary history. Using genetic imprints left during R. solanacearum evolution, we were able to delineate distinct evolutionary complex displaying contrasting dynamics. Among the phylotypes already described (I, IIA, IIB, III, IV), eight groups of strains with distinct evolutionary patterns, named clades, were identified. From our recombination analysis, we identified 21 recombination events that occurred within and across these lineages. Although appearing the most divergent and ancestral phylotype, phylotype IV was inferred as a gene donor for the majority of the recombination events that we detected. Whereas this phylotype apparently fuelled the species diversity, ongoing diversification was mainly detected within phylotype I, IIA and III. These three groups presented a recent expanding population structure, a high level of homologous recombination and evidences of long-distance migrations. Factors such as adaptation to a specific host or intense trading of infected crops may have promoted this diversification. Whether R. solanacearum lineages will eventually evolve in distinct species remains an open question. The intensification of cropping and increase of geographical dispersion may favour situations of phylotype sympatry and promote higher exchange of key factors for host adaptation from their common genetic pool.

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Section: Evolutionary History Of Ralstonia Solanacearummentioning

confidence: 99%

Contrasting recombination patterns and demographic histories of the plant pathogen Ralstonia solanacearum inferred from MLSA

et al. 2011

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“…Based on the host range, R. solanacearum has been phenotypically classified into five races: Race 1 (solanaceous vegetables), Race 2 (banana), Race 3 (potato and tomato from temperate regions), Race 4 (ginger), and Race 5 (mulberry) (Buddenhagen et al 1962;Wicker et al 2007). Biovar classification has been defined by their ability to utilize disaccharides and to oxidize hexose alcohols (He et al 1983;Hayward 1964Hayward , 1991Genin and Denny 2012). Although both classification schemes have been used to describe the diversity of R. solanacearum for a long time, several disadvantages have been revealed with our increasing knowledge of pathogen diversity, such as the lack of discriminating power, additional time required, and lack of correlation with the phylogenetic origin of different strains (Siri et al 2011;Genin and Denny 2012).…”

Section: Introductionmentioning

confidence: 99%

“…There are many reports studying the genetic diversity of Chinese R. solanacearum strains; three out of five races (race 1, 3 and 5) and all five biovars (bv. 1, 2, 3, 4 and 5) have been identified (He et al 1983;Lu 1998). Xu et al (2009) analyzed the genetic diversity of Chinese R. solanacearum strains, suggesting that Chinese R. solanacearum strains belonged to phylotype I and II and that phylotype I was predominant and included 10 different sequevars.…”

Section: Introductionmentioning

confidence: 99%

The sequevar distribution of Ralstonia solanacearum in tobacco-growing zones of China is structured by elevation

Liu

et al. 2016

Eur J Plant Pathol

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Bacterial wilt, caused by Ralstonia solanacearum, is a devastating disease resulting in tremendous losses of economic crops such as plants in the Solanaceae. Recent studies showed that R. solanacearum is spreading from the lowlands to the highlands in China. We studied 97 Chinese R. solanacearum strains that were isolated from four tobacco-growing zones over a wide range of elevations using phylotype specific multiplex polymerase chain reaction (Pmx-PCR) and phylogenetic relationships (egl and mutS). The results showed that all isolates belonged to phylotype I, which were further clustered into eight egl-sequence type groups (egl-group, sequevar): sequevars 13, 14, 15, 17, 34, 44, 54, and 55. In addition, Sequevar 55, found from the highlands, was a new/unknown one. Southeast China (Z3) had the largest number of egl-groups, containing six sequevars. The basin of the Yangzi River (Z1) and southwestern China (Z2) contained five egl-groups. The basin of the Huai River (Z4), near the north of China, where slight bacterial wilt occurred recently, contained a single group, sequevar 15. The distribution of sequevars was associated with elevation. Sequevar 15 was over-represented in lowland elevations, while sequevar 54 and the new/unknown one were only found in areas of moderate to high elevations. This finding suggested that the phylotype I strains infecting tobacco were diverse in China and regional integrated control strategies should be considered.

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“…Irreversible foliar wilting generally develops quickly, resulting in plant death. Historically, R. solanacearum has been classified into five races and six biovars according to host range and trophic traits, respectively (Buddenhagen et al 1962;Hayward 1964;He et al 1983;Pegg and Moffett 1971). More recently, phylogenetic analysis described four distinctive phylotypes that are related to the geographical origin of the strains: phylotype I (Asia), phylotype II (America), phylotype III (Africa) and phylotype IV (Indonesia) (Cook et al 1989;Cook and Sequeira 1994;Fegan and Prior 2005).…”

Section: Introductionmentioning

confidence: 99%

Genetic mapping of a major dominant gene for resistance to Ralstonia solanacearum in eggplant

et al. 2012

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Resistance of eggplant against Ralstonia solanacearum phylotype I strains was assessed in a F 6 population of recombinant inbred lines (RILs) derived from a intra-specific cross between S. melongena MM738 (susceptible) and AG91-25 (resistant). Resistance traits were determined as disease score, percentage of wilted plants, and stem-based bacterial colonization index, as assessed in greenhouse experiments conducted in Réunion Island, France. The AG91-25 resistance was highly efficient toward strains CMR134, PSS366 and GMI1000, but only partial toward the highly virulent strain PSS4. The partial resistance found against PSS4 was overcome under high inoculation pressure, with heritability estimates from 0.28 to 0.53, depending on the traits and season. A genetic map was built with 119 AFLP, SSR and SRAP markers positioned on 18 linkage groups (LG), for a total length of 884 cM, and used for quantitative trait loci (QTL) analysis.

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Characteristics of Strains ofPseudomonas solanacearumfrom China

Cited by 254 publications

References 0 publications

Contrasting recombination patterns and demographic histories of the plant pathogen Ralstonia solanacearum inferred from MLSA

Contrasting recombination patterns and demographic histories of the plant pathogen Ralstonia solanacearum inferred from MLSA

The sequevar distribution of Ralstonia solanacearum in tobacco-growing zones of China is structured by elevation

Genetic mapping of a major dominant gene for resistance to Ralstonia solanacearum in eggplant

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