Nightshade weeds (Solanumspp.) confirmed as hosts of the potato pathogensMeloidogyne fallaxandSpongospora subterraneaf. sp.subterranea

Shah, Farhat A.; Falloon, R. E.; Bulman, Simon

doi:10.1071/ap10059

Cited by 25 publications

(14 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Some other Solanum spp. hosts of the pathogen, which do not produce stolons or tubers (modified stolons), only develop root galls (Nitzan et al 2008;Nitzan et al 2009;Shah et al 2010). In potato, the first stage of root infection by the pathogen is when zoospores infect root epidermis cells and develop into zoosporangia, and galls later form on roots, stolons or tubers.…”

Section: Introductionmentioning

confidence: 99%

Low amounts of Spongospora subterranea sporosorus inoculum cause severe powdery scab, root galling and reduced water use in potato (Solanum tuberosum)

Shah

Falloon

Butler

et al. 2011

Australasian Plant Pathol.

Self Cite

View full text Add to dashboard Cite

This study measured effects of Spongospora subterranea soil inoculum levels on disease of potato tubers and roots, determining relationships between amount of sporosorus inoculum at planting, and both root function during plant growth and powdery scab on tubers at harvest. In a series of shadehouse experiments, different amounts of inoculum were applied to soil before planting tubers in large pots, and effects on plant growth and powdery scab incidence and severity were determined. In a glasshouse experiment different amounts of inoculum were applied to plants growing in sand/nutrient solution culture, and effects on water use, plant parameters and intensity of S. subterranea root gall formation were measured. In the shadehouse experiments, as few as 25 sporosori mL -1 soil caused powdery scab on daughter tubers, and greater amounts of inoculum reduced plant productivity (tuber yields). In the glasshouse experiment, from one to ten sporosori g -1 sand reduced water use by plants and shoot and root dry weights, and caused severe root galling. No consistently strong relationship was found between amount of inoculum at planting and disease incidence or severity at harvest. These results highlight the ability of S. subterranea to cause disease on host plants from low amounts of inoculum when conditions favour disease development, and emphasise the potential for the pathogen to reduce plant growth and tuber yields. They also show that inoculum detection methods should detect low soil inoculum amounts if they are to be useful for powdery scab prediction.

show abstract

Section: Introductionmentioning

confidence: 99%

Low amounts of Spongospora subterranea sporosorus inoculum cause severe powdery scab, root galling and reduced water use in potato (Solanum tuberosum)

Shah

Falloon

Butler

et al. 2011

Australasian Plant Pathol.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Alternative hosts are wild potato species (South America) and other solanaceous plants, e.g. nightshade ( Solanum nigrum ), a common weed in potato production [20]. Different potato cultivars show differences in susceptibility to root and tuber infection [21].…”

Section: Introductionmentioning

confidence: 99%

Global Genetics and Invasion History of the Potato Powdery Scab Pathogen, Spongospora subterranea f.sp. subterranea

et al. 2013

Self Cite

View full text Add to dashboard Cite

Spongospora subterranea f. sp. subterranea (Sss) causes two diseases on potato (Solanum tuberosum), lesions on tubers and galls on roots, which are economically important worldwide. Knowledge of global genetic diversity and population structure of pathogens is essential for disease management including resistance breeding. A combination of microsatellite and DNA sequence data was used to investigate the structure and invasion history of Sss. South American populations (four countries, 132 samples) were consistently more diverse than those from all other regions (15 countries, 566 samples), in agreement with the hypothesis that Sss originated in South America where potato was domesticated. A substantial genetic differenciation was found between root and tuber-derived samples from South America. Estimates of past and recent gene flow suggested that Sss was probably introduced from South America into Europe. Subsequently, Europe is likely to have been the recent source of migrants of the pathogen, acting as a “bridgehead” for further global dissemination. Quarantine measures must continue to be focussed on maintaining low global genetic diversity and avoiding exchange of genetic material between the native and introduced regions. Nevertheless, the current low global genetic diversity of Sss allows potato breeders to select for resistance, which is likely to be durable.

show abstract

“…pekinensis in China (Zhao et al, 2014;Alkooranee et al, 2015), Cleome hassleriana in Italy (Garibaldi et al, 2009), and Brassica juncea in Korea (Kim et al, 2013), while our study indicate that wild mustard could be also an alternative host of the powdery mildew (E. cruciferarum) pathogen which infect camelina plants. In several studies, the importance of weeds as reservoir hosts for plant pathogens have been demonstrated (Shah et al, 2010;Karkanis et al, 2012). Wild mustard apart from powdery mildew is also a host of a number of diseases, including Peronospora brassicae Gäum, Plasmodiophora brassicae Woron.…”

Section: Resultsmentioning

confidence: 99%

Powdery Mildew (Erysiphe Cruciferarum) Infection on Camelina (Camelina Sativa) Under Mediterranean Conditions and the Role of Wild Mustard (Sinapis Arvensis) as Alternative Host of This Pathogen

2017

View full text Add to dashboard Cite

During the growing season 2014-2015, camelina (Camelina sativa (L.) Crantz) plants were naturally infected by powdery mildew at the province of Domokos in Central Greece. Moreover, wild mustard (Sinapis arvensis L.) plants, naturally occurring in camelina field, were infected by the disease. The environmental conditions that influence infection of camelina by powdery mildew were recorded. The anamorph as well as the teleomorph of the fungus pathogen were observed on symptomatic leaves, stems and fruits of camelina and wild mustard plants. Fungal specimens were examined. Conidiophores were cylindrical and comprised 3 cells, while conidia were produced singly; they were oblong to cylindrical and measured 21.8 to 40.5 × 9.4 to 18.4 μm (average 32.1 × 13.9 μm). Chasmothecia were also observed on the upper surface of camelina or wild mustard leaves and on wild mustard siliques. Immature chasmothecia were globose, yellow and turned dark brown as reached maturity. Each chasmothecium contained six asci that measured 47.6 to 74.5 × 29.8 to 44.7 μm. Based on these characteristics the pathogen was identified as Erysiphe cruciferarum Opiz ex L. Junell, being probably the first report of E. cruciferarum on camelina in Greece.

show abstract

Nightshade weeds (Solanumspp.) confirmed as hosts of the potato pathogensMeloidogyne fallaxandSpongospora subterraneaf. sp.subterranea

Cited by 25 publications

References 31 publications

Low amounts of Spongospora subterranea sporosorus inoculum cause severe powdery scab, root galling and reduced water use in potato (Solanum tuberosum)

Low amounts of Spongospora subterranea sporosorus inoculum cause severe powdery scab, root galling and reduced water use in potato (Solanum tuberosum)

Global Genetics and Invasion History of the Potato Powdery Scab Pathogen, Spongospora subterranea f.sp. subterranea

Powdery Mildew (Erysiphe Cruciferarum) Infection on Camelina (Camelina Sativa) Under Mediterranean Conditions and the Role of Wild Mustard (Sinapis Arvensis) as Alternative Host of This Pathogen

Contact Info

Product

Resources

About