Vine cuttings as possible initial inoculum sources of Ralstonia solanacearum race 1 biovar 4 on vegetable sweet potato in fields

Chen, Yi-Jeng; Lin, Yi-Sheng; Tseng, Kuo-Jin; Chung, Wen‐Hsin

doi:10.1007/s10658-014-0445-2

Cited by 3 publications

(2 citation statements)

References 24 publications

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“…Most studies on latent infection caused by the R. solanacearum species complex have focused on the role of potato tubers (Ozakman and Schaad 2003;Milling et al 2009). However, some studies have also been conducted with geranium (Swanson et al 2005) and sweet potato (Chen et al 2014). Further studies are required to determine the importance of latent infections on geranium varieties with different levels of resistance for bacterial wilt epidemics.…”

Section: Discussionmentioning

confidence: 99%

Characterization and pathogenicity to geranium of Brazilian strains of Ralstonia spp.

Rossato

Santiago

Mizubuti

et al. 2017

Trop. plant pathol.

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Ralstonia solanacearum (race 3 biovar 2, phylotype IIB, brown-rot ecotype) became an agent of bioterrorism in the USA after the assessment that its introduction in association with geranium plants would affect other crops, especially potatoes. Because race3 biovar 2 is ubiquitous in Brazil and geranium cuttings are exported to many countries, two geranium species were challenged with 32 Brazilian isolates of R. solanacearum and four of R. pseudosolanacearum in order to assess the risk associated with the long-distance spread of the pathogen. Nineteen isolates of nine sequevars of Ralstonia spp. induced wilt in geranium plants, including some belonging to R. pseudosolanacearum (phylotype I), which apparently has not previously been reported infecting this host. No correlations were observed between either race, biovar, phylotype, or sequevar with ability to cause wilt in geranium plants, corroborating the enormous genetic diversity of this species and its isolate-specific virulence. Pelargonium peltatum was more resistant than P. hortorum, indicating that it can be an alternative to reduce crop losses caused by bacterial wilt, even though it also can be a carrier of these pathogens in latent infections.

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Section: Discussionmentioning

confidence: 99%

Characterization and pathogenicity to geranium of Brazilian strains of Ralstonia spp.

Rossato

Santiago

Mizubuti

et al. 2017

Trop. plant pathol.

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“…Yields of VSP have been shown to be reduced by 30%–80% due to bacterial wilt (BW) in Taiwan during the past several years (Chen, Lin, & Chung, ). Propagation is by vine cuttings, and a recent study demonstrated that, Ralstonia solanacearum race 1 biovar 4 (R1bv4) can latently infect such cuttings and serve as the major inoculum source for introducing BW into Taiwan VSP fields (Chen, Lin, Tseng, & Chung, ). It has also been shown that R. solanacearum race 1 can latently infect resistant tomato cultivars and non‐host weeds, but the pathogen in these plants is limited to stem or root tissues (Grimault, Anais, & Prior, ; Nakaho, ; Nakaho, Inoue, Takayama, & Miyagawa, ; Nakaho, Takaya, & Sumida, ; Pradhanang, Elphinstone, & Fox, ).…”

Section: Introductionmentioning

confidence: 99%

Distribution and multiplication of Ralstonia solanacearum strain race 1 biovar 4 in vegetable sweet potato cuttings

Chen

Lin

Pan

et al. 2019

Journal of Phytopathology

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Ralstonia solanacearum (RS) race 1 biovar 4 (R1bv4), causal agent of bacterial wilt in vegetable sweet potato (VSP), is often latent in VSP vines and is important in introduction of the pathogen to newly planted fields. In this study, the effects of biological and environmental factors on the distribution and multiplication of R1bv4 in VSP tissues were examined. Based on stem‐injection inoculation, the R1bv4strain of NC01 could cause 49.0% and 33.0% wilting on VSP cultivars TN71 and WS, respectively. The populations of NC01 in diseased TN71 and WS were 108–109 cfu/g tissue at 28th day after inoculation. On the other hand, the R1bv4 could not cause symptom in cultivars of TN57 and VSPSL‐1 vine and the NC01 was confined to near the injection sites. Temperature tests indicated that NC01 could cause 28.0% and 14.0% wilting on cultivar TN71 at 28 and 20°C, respectively. Moreover, the populations of NC01in diseased plants were 1.6 × 109 and 7.9 × 108 cfu/g tissue at 28 and 20°C, respectively. The distribution of NC01 in VSP stem indicated that the isolation frequency of NC01 was lower than 31.0% in terminal shoots or erect stems and 45.0 to 100.0% in creeping stem after 8 wks planted in infested soil (106 cfu/g soil). The results demonstrated that terminal shoots or erect stems were not common carrier for transmitting R1bv4. Furthermore, two R1bv4 strains, NC01 and HsinT01, were examined the ability for latent infection on cv. TN71. The results revealed that NC01 and HsinT01 showed different ability of latent infection on cultivar TN71. NC01 had lower percentage (46.8% and 45.1%) than HsinT01 (93.4% and 75.3%) at 20 and 28°C.

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Rapid diagnosis of Ralstonia solanacearum infection sweet potato in China by loop-mediated isothermal amplification

Zhang

et al. 2020

Arch Microbiol

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Vine cuttings as possible initial inoculum sources of Ralstonia solanacearum race 1 biovar 4 on vegetable sweet potato in fields

Cited by 3 publications

References 24 publications

Characterization and pathogenicity to geranium of Brazilian strains of Ralstonia spp.

Characterization and pathogenicity to geranium of Brazilian strains of Ralstonia spp.

Distribution and multiplication of Ralstonia solanacearum strain race 1 biovar 4 in vegetable sweet potato cuttings

Rapid diagnosis of Ralstonia solanacearum infection sweet potato in China by loop-mediated isothermal amplification

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