Immunity to Clavibacter michiganensis subsp. sepedonicus: Inheritance of immunity in Solanum acaule

Kriel, C. J.; Jansky, Shelley; Gudmestad, Neil C.; Ronis, D. H.

doi:10.1007/bf00027059

Cited by 9 publications

(9 citation statements)

References 23 publications

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“…to ring rot into potato cultivars, where the pathogen is able to colonise the host tissue in the absence of disease expression, is an acknowledged hazard in the potato industry (Kriel et al 1995). So, to control Cms effectively, it is necessary to apply some reasonable restrictive measures.…”

Section: Economic Importance Of Cms Remains Still Controversialmentioning

confidence: 99%

History of bacterial ring rot of potato in the Czech Lands and a proposal for relaxation of strict quarantine measures

Kůdela¹

2007

Plant Prot. Sci.

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Kůdela V. (2007): History of bacterial ring rot of potato in the Czech Lands and a proposal for relaxation of strict quarantine measures. Plant Protect. Sci., 43: 35-46.In the supposed or proven incidence of bacterial ring rot caused by Clavibacter michiganensis subsp. sepedonicus (Cms) in certified seed and commercial potatoes, five periods can be identified in the Czech Lands from 1910 to 2006: (i) high incidence of Cms in potato crops is claimed (about 1910-1929); (ii) very low incidence in certified potatoes and sporadic occurrence in commercial potatoes (about 1930-1985); (iii) increasing incidence of Cms in certified seed potatoes and its sporadic occurrence in commercial potatoes is assumed (about 1986-1997); (iv) a relatively high percentage of potato tuber samples proved to be infected by Cms, namely 1.14% in seed potatoes in 1998 and 4.13% in commercial potatoes in 1999 (1998-2004 period); (v) progressive decrease of Cms incidence to zero in seed potato samples and 0.19% in commercial samples in 2005, followed by a slight increase to 0.15% in seed potatoes and 0.23% in commercial potatoes in 2006 (2005-2006 period). Thus, up to 2006, Cms was and is not widely distributed in the CR and is actively and effectively controlled, mainly through the zero tolerance for ring rot bacterium in the seed potato certification program. In the CR, Cms has a relatively low capacity for damage and can hardly be considered as a pest of national economic importance. Strictly speaking, Cms does not fulfill the criteria for a quarantine organism. If, however, the quarantine status of Cms will be maintained, the severe post-entry measures against it should be relaxed.

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Section: Economic Importance Of Cms Remains Still Controversialmentioning

confidence: 99%

History of bacterial ring rot of potato in the Czech Lands and a proposal for relaxation of strict quarantine measures

Kůdela¹

2007

Plant Prot. Sci.

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“…Another advantage of glasshouse screening is that is allows the evaluation of resistance to pathogens that cannot feasibly be introduced to the outside environment (Kriel et al. ). Moreover, most plants identified as resistant under glasshouse conditions remained so in field tests (Simko et al.…”

Section: Discussionmentioning

confidence: 99%

“…In a second step of resistance evaluation, glasshouse-based assays were envisaged because they can provide a compromise between costly time-consuming field trials and in vitro assays, which do not typically evaluate entire plants. Another advantage of glasshouse screening is that is allows the evaluation of resistance to pathogens that cannot feasibly be introduced to the outside environment (Kriel et al 1995). Moreover, most plants identified as resistant under glasshouse conditions remained so in field tests (Simko et al 2007).…”

Section: Discussionmentioning

confidence: 99%

Somatic Hybrids Between Potato and S. berthaultii Show Partial Resistance to Soil‐Borne Fungi and Potato Virus Y

Nouri-Ellouz

Triki²,

Jbir-Koubaa³

et al. 2016

Journal of Phytopathology

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Three tetraploid somatic hybrid lines produced by protoplast fusion between a dihaploid potato, Solanum tuberosum, cultivar BF15 and the wild potato species Solanum berthaultii were evaluated here for their response to different soil‐borne pathogens, that is Fusarium solani, Pythium aphanidermatum and Rhizoctonia solani as well as to infection by potato virus Y (PVY). Both hybrid and BF15 plants grown in vitro were inoculated with the tested pathogen strains, that is R. solani, P. aphanidermatum, or F. solani. The growth level and disease severity index of these plants were compared to the susceptible commercial cultivar Spunta. A better growth of inoculated hybrid plants and restricted disease symptoms were observed in comparison with the commercial plants. Under glasshouse conditions and after inoculation with R. solani and P. aphanidermatum, improved resistance of the hybrid plants to these pathogens was confirmed. Indeed, these plants showed no significant damage following inoculation and a better development in R. solani‐infected plants. The susceptibility of the hybrid tubers to R. solani, P. aphanidermatum, and to F. solani infection was also determined. A significant reduction of tissue colonisation was observed in all the hybrid lines compared to the cultivated cultivars. The STBc and STBd hybrids also showed improved resistance to the PVY ordinary strain (PVYo) under glasshouse conditions.

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“…Immune cultivars, which would not be expected to become infected with the pathogen, could be beneficial in advancing eradication of the disease. According to earlier studies (Ishimaru et al ., 1994; Kriel et al ., 1995b), the tetraploid wild potato species S. acaule 7‐8 showed immunity to bacterial ring rot. The ultimate goal of this study was to transfer this specific trait from S. acaule to interspecific somatic hybrids between S. acaule and S. tuberosum , and subsequently to incorporate immunity into cultivated potato.…”

Section: Discussionmentioning

confidence: 99%

“…These tests found one wild potato species, Solanum acaule ssp. acaule accession PI472655·8 (7‐8), which appeared to be immune to bacterial ring rot (Ishimaru et al ., 1994; Kriel et al ., 1995a,b).…”

Section: Introductionmentioning

confidence: 99%

Infection of plant material derived from Solanum acaule with Clavibacter michiganensis ssp. sepedonicus: temperature as a determining factor in immunity of S. acaule to bacterial ring rot

et al. 2003

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The development of potato (Solanum tuberosum) cultivars immune (completely free of infective agents) to bacterial ring rot disease, caused by Clavibacter michiganensis ssp. sepedonicus, would be a significant step toward eradication of the disease. Earlier results suggested that the wild potato species Solanum acaule, acc. PI472655 (genotype 7‐8), was immune to C. michiganensis ssp. sepedonicus. The goal of the present study was to investigate the possibility of transferring this desirable trait to cultivated potato through interspecific somatic hybridization. Eight different somatic hybrids between S. acaule and S. tuberosum, with three different genome ratios, were tested for susceptibility to infection in the glasshouse using two C. michiganensis ssp. sepedonicus strains. All the somatic hybrids expressed symptoms of ring rot and were susceptible to infection as determined by IFAS (indirect immunofluorescent antibody staining) tests. The genome compositions of the hybrids influenced bacterial titres. Most of the hybrids with a higher proportion of the S. acaule genome contained lower numbers of C. michiganensis ssp. sepedonicus cells than hybrids with lower proportions of the S. acaule genome. In growth chamber tests, temperature was found to be a determining factor in the expression of immunity in the tetraploid S. acaule 7‐8 line. At 21°C, S. acaule 7‐8 was immune to infection by C. michiganensis ssp. sepedonicus, but at 15°C, plants supported large populations of the pathogen. However, none of the S. acaule plants expressed disease symptoms. Thus, S. acaule exhibits temperature‐dependent immunity to infection by C. michiganensis ssp. sepedonicus and should be considered tolerant rather than immune.

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Immunity to Clavibacter michiganensis subsp. sepedonicus: Inheritance of immunity in Solanum acaule

Cited by 9 publications

References 23 publications

History of bacterial ring rot of potato in the Czech Lands and a proposal for relaxation of strict quarantine measures

History of bacterial ring rot of potato in the Czech Lands and a proposal for relaxation of strict quarantine measures

Somatic Hybrids Between Potato and S. berthaultii Show Partial Resistance to Soil‐Borne Fungi and Potato Virus Y

Infection of plant material derived from Solanum acaule with Clavibacter michiganensis ssp. sepedonicus: temperature as a determining factor in immunity of S. acaule to bacterial ring rot

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