Plant parameters, the intensity of zoosporangium infection in roots. Stages of development of root galls caused by spongospora subterranea on potato plants. This aquatic fungus, now classified as protozoa, is best known as the cause of potato powdery scab, but is also able to attack many other solanaceae, cultivated or not. Spongospora subterranea is a biotrophic pathogen classi. In pt4 diseasefree minitubers of russet burbank were used and s. Symptoms of powdery scab include small lesions in the early stages of the disease, progressing to raised pustules containing a powdery mass.
Powdery scab spongospora subterranea of potatoes in queensland. Spongospora subterranea is the causal agent of powdery scab on potato. By nadav nitzan, dennis johnson, dallas batchelorand chuck broltn introduction powdery scab of potato is caused by spongospora subterranea. Gudmestad1, 1 department of plant pathology, north dakota state university, fargo, nd 58108 2 bioagricultural sciences and pest management, colorado state university. Original article multiplex realtime pcr taqman assay. During this same year, the disease was found established in potatogrowing states such as maine, florida, minnesota and oregon. Australasian journal of experimental agriculture and animal husbandry 20106.
Pdf spongospora subterranea is responsible for significant potato root and. Project report epidemiology, autecology and control of spongospora subterranea, cause of potato powdery scab ref. Though this disease can reduce yield somewhat, the true economic effect is due to the unmarketable, scabbed appearance figure 1 as well as rejection of tubers as seed to prevent. Detection and quantification of spongospora subterranea sporosori. Spongospora subterranea sponsuoverview eppo global. These can eventually rupture within the tuber periderm. Plants grown in sandnutrient solution culture were inoculated with s. Pcrbased methods were developed for the detection and quantification of the potato pathogen spongospora subterranea f. Epidemiology and control of spongospora subterranea f. The significance to infection of the histological changes during the transformations of stomata to lenticels is discussed. Spongospora subterranea root infection assessed in two. Scabby regions on the diseased tuber surface greatly diminish tuber quality and marketability. Monitoring spongospora subterranea development in potato.
Iftikhar et al characterization of spongospora subterranea f sp subterranea root hair and epidermal cells of roots under a stereomicroscope with 20fold magnificatiarn rating of root infection done on 04 scale of marz 1989, vvhsre 0 no sporangia, 1 only a fevv sporangia, several roots with sporangia, 3 sporangia regularly. During 19941996 surveys were performed in the netherlands on tubers with symptoms resembling common scab. Introduction powdery scab of potato is caused by a protozoan pathogen, spongospora subterranea f. Powdery scab spongospora subterranea of potatoes by melhus, i. As not much is known about the life cycle of spongospora subterranea f. Spongospora subterranea is also thevectorofthepotato moptop virus, another economically important pathogen of potato kirk 2008. Validation of quantitative realtime qpcr for quantifying spongospora subterranea ss sporosori per gram of soil in either a single a, c, e, and g or a duplex b, d, f, and h qpcr along with. The relationship between initial soil inoculum level of spongospora. Detection and eradication of spongospora subterranea in. Egan, department of environmental resource management, national university of ireland, belfield, dublin 4, ireland introduction the plasmodiophorid spongospora subterranea f.
A new distribution map is provided for spongospora subterranea wallr. Protection research centre, lincoln university, lincoln, new zealand spongospora subterranea root infection reduces potato plant growth and tuber yields. Dehne hw, adam g, diekmann m, frahm j, maulermachnik a, halteren p van, eds. Summary potato moptop virus pmtv was detected by elisa in primary zoospores from four out of six isolates of spongospora subterranea f. Nov 21, 2012 infection by spongospora subterranea of roots of two potato solanum tuberosum cultivars, either very resistant or very susceptible to powdery scab on their tubers, was studied in a glasshouse experiment. Three field experiments were conducted in naturally infested soil during winter 2008, 2012 and 20 to evaluate the efficacy of soil fumigation on powdery scab on tubers, root galling and the pathogen populations in. Pdf we investigated soil contamination by spongospora subterranea f. Knowledge of global genetic diversity and population structure of pathogens is essential for disease management including resistance breeding. Media in category spongospora subterranea the following 3 files are in this category, out of 3 total. Investigating factors affecting infection of potato by. Powdery scab of potato, caused by the plasmodiophorid pathogen spongospora subterranea f.
Powdery scab of potatoes publications ndsu agriculture. Serological detection of spongospora subterranea f. World distribution of spongospora subterranea sponsu eppo global database. Root infection of potato by spongospora subterranea. Taxonomic serial no 181449 download help spongospora subterranea tsn 181449 taxonomy and nomenclature kingdom. Evidence that potato tubers are susceptible to infection by s. Dominique blancard, in tomato diseases second edition, 2012. Monitoring spongospora subterranea development in potato roots. Pdf monitoring spongospora subterranea development in potato. Hairy nightshade is an alternative host of spongospora. Detection and quantification of spongospora subterranea. Potato cultivars that are susceptible to the disease present spongelike galls on the roots and stolons fig, and scabby lesions on the tubers fig.
A contribution to the knowledge of spongospora subterranea wallr. Potatoes disease caused by spongospora subterranea or. Additional copies of this report and a list of other publications can be obtained from. Although powdery scab disease of potatoes has been known and studied for nearly one hundred years, zoosporangia have never been described in the lifehistory of the causal organism, spongospora. Control of potato powdery scab spongospora subterranea. Other articles where spongospora subterranea is discussed. Powdery scab, caused by spongospora subterranea, causes significant economic damage in potato production worldwide due to reduced quality and marketability of seed and ware tubers. Pdf spongospora subterranea soil contamination and its. Based on visual inspection, discrimination between common scab streptomyces spp. This disease is caused by the obligate, plasmodiophorid pathogen spongospora subterranea wallroth lagerheim f. Class project for pp 728, soilborne plant pathogens, fall 2012 introduction. Occurrence of zoosporangia in spongospora subterranea. Investigating factors affecting infection of potato by spongospora subterranea alison lees, louise sullivan and jennie brierley plant pathology, scri, invergowrie, dundee, dd2 5da, uk conclusions and future work dna of s. Detection and quantification of spongospora subterranea f.
Global genetics and invasion history of the potato powdery. Spongospora subterranea wikispecies, free species directory. However, its production is often adversely affected by soilborne fungal pathogens such as spongospora subterranea f. Inspections are performed on unwashed samples, incidentally supported by microscopic examination. Whether reduction in tuber yield may result as consequence of s. General information about spongospora subterranea sponsu name language. Though this disease can reduce yield somewhat, the true economic effect is due to the unmarketable, scabbed appearance figure 1 as well as rejection of tubers as seed to prevent infestation of. Although powdery scab disease of potatoes has been known and studied for nearly one hundred years, zoosporangia have never been described in. Biocontrol of powdery scab of potato by seed tuber. Agronomic factors affect powdery scab of potato and. It is caused by the cercozoan spongospora subterranea f. Detection and quantification of spongospora subterranea sporosori in soil by quantitative realtime pcr ipsita mallik,1 ana cristina fulladolsa, 2s. Infection by spongospora subterranea of roots of two potato solanum tuberosum cultivars, either very resistant or very susceptible to powdery scab on their tubers, was studied in a glasshouse experiment.
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