Genetic characterisation of Pectobacterium wasabiae causing soft rot disease of potato in New Zealand
Pectobacterium wasabiae has a narrow host range, having previously only been associated with Japanese horseradish. However, recent characterisation of Pectobacterium causing soft rotting in New Zealand has identified putative P. wasabiae isolates pathogenic to potato. In this study, phylogenetic rec...
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| Veröffentlicht in: | European journal of plant pathology 2010-03, Vol.126 (3), p.423-435 |
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| creator | Pitman, Andrew R Harrow, Sally A Visnovsky, Sandra B |
| description | Pectobacterium wasabiae has a narrow host range, having previously only been associated with Japanese horseradish. However, recent characterisation of Pectobacterium causing soft rotting in New Zealand has identified putative P. wasabiae isolates pathogenic to potato. In this study, phylogenetic reconstruction of acnA and mdh DNA sequences and fluorescent amplified fragment length polymorphisms (fAFLP) were used to confirm the identity of the putative P. wasabiae isolates. Both methods clustered the potato isolates closely with the type strain for P. wasabiae, ICMP9121, and also differentiated them from other plant pathogenic enterobacteria. PCR, DNA hybridisation and hypersensitive response (HR) assays were subsequently used to investigate the presence in P. wasabiae of the type III secretion system (T3SS) as well as other virulence factors known to be involved in development of disease by enterobacteria. Although all P. wasabiae strains appeared to elicit a type III-dependent HR in tobacco, genes associated with the T3SS and the putative virulence factors HecB and DspE could not be detected. Thus, genetic characterisation of P. wasabiae confirmed that it is a naturally occurring pathogen on potato, which does not possess the same suite of virulence factors that are involved in the pathogenicity of other enterobacteria on this host. |
| doi_str_mv | 10.1007/s10658-009-9551-y |
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However, recent characterisation of Pectobacterium causing soft rotting in New Zealand has identified putative P. wasabiae isolates pathogenic to potato. In this study, phylogenetic reconstruction of acnA and mdh DNA sequences and fluorescent amplified fragment length polymorphisms (fAFLP) were used to confirm the identity of the putative P. wasabiae isolates. Both methods clustered the potato isolates closely with the type strain for P. wasabiae, ICMP9121, and also differentiated them from other plant pathogenic enterobacteria. PCR, DNA hybridisation and hypersensitive response (HR) assays were subsequently used to investigate the presence in P. wasabiae of the type III secretion system (T3SS) as well as other virulence factors known to be involved in development of disease by enterobacteria. Although all P. wasabiae strains appeared to elicit a type III-dependent HR in tobacco, genes associated with the T3SS and the putative virulence factors HecB and DspE could not be detected. 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However, recent characterisation of Pectobacterium causing soft rotting in New Zealand has identified putative P. wasabiae isolates pathogenic to potato. In this study, phylogenetic reconstruction of acnA and mdh DNA sequences and fluorescent amplified fragment length polymorphisms (fAFLP) were used to confirm the identity of the putative P. wasabiae isolates. Both methods clustered the potato isolates closely with the type strain for P. wasabiae, ICMP9121, and also differentiated them from other plant pathogenic enterobacteria. PCR, DNA hybridisation and hypersensitive response (HR) assays were subsequently used to investigate the presence in P. wasabiae of the type III secretion system (T3SS) as well as other virulence factors known to be involved in development of disease by enterobacteria. Although all P. wasabiae strains appeared to elicit a type III-dependent HR in tobacco, genes associated with the T3SS and the putative virulence factors HecB and DspE could not be detected. Thus, genetic characterisation of P. wasabiae confirmed that it is a naturally occurring pathogen on potato, which does not possess the same suite of virulence factors that are involved in the pathogenicity of other enterobacteria on this host.</description><subject>Agriculture</subject><subject>Amplified fragment length polymorphism</subject><subject>Biological and medical sciences</subject><subject>Biomedical and Life Sciences</subject><subject>Deoxyribonucleic acid</subject><subject>DNA</subject><subject>Ecology</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Genetics</subject><subject>Life Sciences</subject><subject>Pathogens</subject><subject>Pectobacterium</subject><subject>Phytopathology. Animal pests. 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| subjects | Agriculture Amplified fragment length polymorphism Biological and medical sciences Biomedical and Life Sciences Deoxyribonucleic acid DNA Ecology Fundamental and applied biological sciences. Psychology Genetics Life Sciences Pathogens Pectobacterium Phytopathology. Animal pests. Plant and forest protection Plant diseases Plant Pathology Plant Sciences Potatoes Vegetables |
| title | Genetic characterisation of Pectobacterium wasabiae causing soft rot disease of potato in New Zealand |
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