An ultrastructural study of the interaction between Spongospora subterranea f. sp. nasturtii and watercress roots

Claxton, J. R.; Potter, Ursula; Blakesley, David; Clarkson, John M.

doi:10.1016/s0953-7562(96)80074-8

Cited by 14 publications

(14 citation statements)

References 25 publications

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“…The first gene, PbPPI1, contained an FKBP family peptidyl prolyl cis-trans isomerase domain. More recently, ultrastructural evidence has been presented for cell to cell movement by a myxamoeboid stage in both P. brassicae and S. nasturtii (Mithen & Magrath, 1992;Claxton et al, 1996). The second gene, PbPDA1 contained a 'NodB-type' chito-oligosaccharide deacetylase domain (Davies et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

Identification of genes from the obligate intracellular plant pathogen,Plasmodiophora brassicae

Bulman

Siemens

Ridgway

et al. 2006

FEMS Microbiology Letters

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Plasmodiophora brassicae is an intracellular pathogen that infects plants in the Brassicaceae family. Although an important pathogen group, information on the genomic makeup of the plasmodiophorids is almost completely lacking. We performed suppression subtractive hybridization (SSH) between RNA from P. brassicae-infected and uninfected Arabidopsis tissue, then screened 232 clones from the resulting SSH library. In addition, we used an oligo-capping procedure to screen 305 full-length cDNA clones from the infected tissue. A total of 76 new P. brassicae gene sequences were identified, the majority of which were extended to full length at the 5' end by the use of RACE amplification. Many of the unisequences were predicted to contain signal peptides for ER translocation. Although we located few sequences in total, these markedly increase available data from the plasmodiophorids, and provide new opportunities to examine plasmodiophorid biology. Our study also points towards the best methods for future plasmodiophorid gene discovery.

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Section: Discussionmentioning

confidence: 99%

Identification of genes from the obligate intracellular plant pathogen,Plasmodiophora brassicae

Bulman

Siemens

Ridgway

et al. 2006

FEMS Microbiology Letters

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“…There is also scant evidence that myxamoebae per se, i.e. cells that are capable of amoeboid-like movement, are ever produced by S. subterranea in potato, although Claxton et al (1996) observed them in watercress roots. After entering the root hair, the pathogen becomes a multinucleate plasmodium, an unwalled protoplast separated from the host by a single unit membrane (Lahert & Kavanagh, 1988;Braselton, 1992).…”

Section: Life Cycle Of Pathogenmentioning

confidence: 99%

Powdery scab disease of potato — a review

Harrison¹,

Searle²,

Williams³

1997

Plant Pathology

128

139

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“…nasturtii (Claxton et al, 1996). The authors found a similar method of host cell penetration by zoospores involving a number of specialized structures, among them the unique 'Stachel'.…”

Section: Introductionmentioning

confidence: 99%

Microscopical observations of the primary zoospores of Spongospora subterranea f.sp. subterranea

Merz

1997

Plant Pathology

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A solution culture test system with Spongospora subterranea f.sp. subterranea spore ball inoculum and tomato bait plants was used to create a pulse of primary zoospore production and subsequent host-root infection. Spore balls and zoospores were examined by light, fluorescence, and transmission and scanning electron microscopy. Most of the resting spores with a developing exit pore did not show any changes in cytoplasmic content typical of zoospore formation. A few empty resting spores and some with developing exit pores were also observed in the absence of host-root exudates. The average diameter of exit pores of empty resting spores was 1 . 5 mm and they were often encircled by a ring-like fusion of wall layers. Mature zoospores were never found inside resting spores. Primary and secondary zoospores are identical in morphology. The infection process is similar to that of other Plasmodiophoromycetes with internal 'Rohr'-like structures in encysted zoospores which were attached by an adhesorium to tomato root hairs. Post-infection papillae and uninucleate plasmodia were observed.

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An ultrastructural study of the interaction between Spongospora subterranea f. sp. nasturtii and watercress roots

Cited by 14 publications

References 25 publications

Identification of genes from the obligate intracellular plant pathogen,Plasmodiophora brassicae

Identification of genes from the obligate intracellular plant pathogen,Plasmodiophora brassicae

Powdery scab disease of potato — a review

Microscopical observations of the primary zoospores of Spongospora subterranea f.sp. subterranea

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