Powdery scab effect on the potato Solanum tuberosum ssp.andigena growth and yield: andigena

Gilchrist, Elizabeth; Soler, Juliana; Merz, U.; Reynaldi, Sebastián

doi:10.1590/s1982-56762011000600002

Cited by 17 publications

(7 citation statements)

References 22 publications

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“…Gilchrist et al . () demonstrated, also in a pot experiment, that height, shoot dry weight and tuber weight of S. tuberosum subsp. andigena plants were reduced in S. subterranea ‐infested soil, relative to pathogen‐free soil.…”

Section: Introductionmentioning

confidence: 82%

Root infection of potato by Spongospora subterranea: knowledge review and evidence for decreased plant productivity

et al. 2015

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Information is reviewed on root infection of potato by the plasmodiophorid Spongospora subterranea f. sp. subterranea. This pathogen has long been recognized as the cause of root galls (hyperplasia) and the economically important disease powdery scab on tubers (modified stolons). The significance for plant productivity of the zoosporangium stages of the pathogen in potato roots has only recently begun to be documented. Two experiments are described that assessed effects of S. subterranea root infection on potato plant root function and productivity. A greenhouse experiment measured root function and plant parameters for eight potato cultivars with markedly different susceptibilities to tuber powdery scab. Water uptake and plant growth were reduced by S. subterranea inoculation in all eight cultivars. The magnitudes of these negative effects, and intensities of root hyperplasia, differed among the cultivars, but were not related to respective susceptibilities to tuber powdery scab. A field trial assessed root function and plant productivity for a cultivar (Iwa) that is very susceptible to Spongospora tuber and root diseases. Soil water content beneath uninoculated plants was consistently less than for inoculated plants, indicating that inoculation reduced water uptake (root function). Inoculation reduced shoot and root dry weights, and reduced weight of tubers per plant by 42%. Spongospora subterranea causes three diseases of potato: root membrane dysfunction, root hyperplasia and tuber powdery scab. The root diseases caused by the pathogen are likely to be important both for powdery scab management and for deleterious effects on potato crop yields.

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Section: Introductionmentioning

confidence: 82%

Root infection of potato by Spongospora subterranea: knowledge review and evidence for decreased plant productivity

et al. 2015

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“…andigena , and S. phureja , we found no evidence of genetic differences in Sss related to different hosts in either the sequence-based phylogeny reconstruction or in the microsatellite based cluster analysis. On Colombian potatoes, tuber lesion formation is rare [22]; for that reason, tuber lesion samples have been obtained from only one region in Colombia. However, we do not think that this sampling introduced a bias caused, for example, by regional adaptation, since F ST results showed that the Colombian tuber lesion samples clustered with those from the Venezuelan tuber lesions.…”

Section: Discussionmentioning

confidence: 99%

“…Different potato cultivars show differences in susceptibility to root and tuber infection [21]. In Colombia it is well recognized that root galls are commonly formed on Sss -infected potato plants, and that tuber lesions caused by Sss are less frequently observed [22]. In most of the regions, where potato was introduced, both symptoms occur.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2013

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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.

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“…Root infection has been associated with disrupted root function and decreased water uptake, and with decreased plant growth and tuber yields (Falloon et al, , 2016Gilchrist, Soler, Merz, & Reynaldi, 2011;Hernandez Maldonado, Falloon, Butler, Conner, & Bulman, 2012;Shah et al, 2012). The impacts of root infection have also been examined in field studies utilizing a variety of methodologies and both naturally infested soils and field plots amended with pathogen inoculum.…”

Section: Discussionmentioning

confidence: 99%

Zoosporangial root infection of tomato by Spongospora subterranea in hydroponic and glasshouse culture results in diminished plant growth

Balendres

Tegg

Amponsah

et al. 2018

Journal of Phytopathology

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Tomato plants are highly susceptible to root infection by Spongospora subterranea and are commonly used as bioassay hosts. The impacts of root infection with S. subterranea on plant productivity and yield have been debated. Recent experiments with potato, the major economic host of S. subterranea, have indicated significantly reduced plant growth and potato yield following heavy infection. However, there have been very few similar studies that have examined the possible impacts of S. subterranea infection on tomato plant growth. Three tomato cultivars, “Grape,” “Roma” and “Truss,” were challenged with S. subterranea inoculum in hydroponic culture. Moderate to severe zoosporangial infections were observed with minor but statistically significant differences in susceptibility among the three tomato cultivars. Zoosporangial root infection in the absence of root gall formation resulted in significantly diminished shoot lengths and plant fresh weights in pathogen challenge tests conducted both in hydroponic culture and glasshouse‐grown plants in potting mix. Root lengths were reduced, but the differences were statistically significant in a single trial only. The findings from this study demonstrate that, as with potato, root infection by S. subterranea can result in reduced tomato plant growth and that root gall production associated with root infection was not necessary for this retardation of growth response. This further suggests that possible yield impacts in other crop species that are hosts for S. subterranea root infection are worthy of examination.

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Powdery scab effect on the potato Solanum tuberosum ssp.andigena growth and yield: andigena

Cited by 17 publications

References 22 publications

Root infection of potato by Spongospora subterranea: knowledge review and evidence for decreased plant productivity

Root infection of potato by Spongospora subterranea: knowledge review and evidence for decreased plant productivity

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

Zoosporangial root infection of tomato by Spongospora subterranea in hydroponic and glasshouse culture results in diminished plant growth

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