Abstract
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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Claims 11
Claim · model-written summary
S. subterranea inoculation reduced potato water uptake in all eight cultivars.
- Treatment
- S. subterranea inoculatione0
- Interactor
- S. subterranea
Spongospora subterraneae0pathogen - Outcome
- Water uptakee0
- Direction
- reducede0
Not reportedTaxonComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water uptake and plant growth were reduced by S. subterranea inoculation in all eight cultivars”
Claim · model-written summary
S. subterranea inoculation reduced potato plant growth in all eight cultivars.
- Treatment
- S. subterranea inoculatione0
- Interactor
- S. subterraneaSpongospora subterraneae0pathogen
- Outcome
- plant growthe0
- Direction
- reducede0
Not reportedTaxonComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water uptake and plant growth were reduced by S. subterranea inoculation in all eight cultivars”
Claim · model-written summary
The negative effects and root hyperplasia intensity differed among potato cultivars.
Not reportedTaxon
Verbatim
e0“The magnitudes of these negative effects, and intensities of root hyperplasia, differed among the cultivars”
Claim · model-written summary
Potato root responses were not related to cultivar susceptibility to tuber powdery scab.
Not reportedTaxonMaterialDirection
Verbatim
e0“were not related to respective susceptibilities to tuber powdery scab”
Claim · model-written summary
Soil beneath uninoculated potato plants held less water than beneath inoculated plants.
- Treatment
- inoculated plantse0
- Outcome
- Soil water contente0
- Direction
- less thane0
- Comparator
- uninoculated plantse0
Not reportedTaxon
Verbatim
e0“Soil water content beneath uninoculated plants was consistently less than for inoculated plants”
Claim · model-written summary
Inoculation reduced potato shoot dry weight.
Not reportedTaxonComparator
Verbatim
e0“Inoculation reduced shoot and root dry weights, and reduced weight of tubers per plant by 42%”
Claim · model-written summary
Inoculation reduced potato root dry weight.
Not reportedTaxonComparator
Verbatim
e0“Inoculation reduced shoot and root dry weights, and reduced weight of tubers per plant by 42%”
Claim · model-written summary
Inoculation reduced potato tuber weight per plant by 42%.
Not reportedTaxonComparator
Verbatim
e0“Inoculation reduced shoot and root dry weights, and reduced weight of tubers per plant by 42%”
Claim · model-written summary
Spongospora subterranea causes potato root membrane dysfunction.
- Taxon
- potato
Solanum tuberosume0 - Interactor
- Spongospora subterraneaSpongospora subterraneae0pathogen
- Outcome
- root membrane dysfunctione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spongospora subterranea causes three diseases of potato: root membrane dysfunction, root hyperplasia and tuber powdery scab”
Claim · model-written summary
Spongospora subterranea causes potato root hyperplasia.
- Taxon
- potatoSolanum tuberosume0
- Interactor
- Spongospora subterraneaSpongospora subterraneae0pathogen
- Outcome
- root hyperplasiae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spongospora subterranea causes three diseases of potato: root membrane dysfunction, root hyperplasia and tuber powdery scab”
Claim · model-written summary
Spongospora subterranea causes potato tuber powdery scab.
- Taxon
- potatoSolanum tuberosume0
- Interactor
- Spongospora subterraneaSpongospora subterraneae0pathogen
- Outcome
- tuber powdery scabe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spongospora subterranea causes three diseases of potato: root membrane dysfunction, root hyperplasia and tuber powdery scab”
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See all 104 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.