Abstract
Infection of seed tubers by pectinolytic Erwinia species can lead to the development of various symptoms during vegetative growth of potato crops, including non‐emergence of plants, chlorosis, wilting, haulm desiccation and typical blackleg. The relationships between types of symptoms and yield are poorly documented, and are investigated by following the development of symptoms in potato plants grown under field conditions from seed tubers artificially inoculated with E. carotovora ssp. atroseptica ( Eca ) , and measuring the yield of each plant. Symptoms were classified into five main types (non‐emergence, wilting/chlorosis, blackleg, haulm desiccation and plant death). Each plant was scored for types of symptom on four successive dates; plants without visible symptoms were scored as healthy. The method of inoculation and inoculum concentration proved major factors for the subsequent development of symptoms. Disease development was more severe after vacuum infiltration of bacteria into seed tubers than after shaking tubers in contaminated sand. Disease usually progressed from chlorosis and/or wilting to partial or total desiccation on a given plant. Yield losses varied according to symptom type, but the relationship between symptoms recorded and yield also depended on scoring dates. The data suggest that the beginning of tuber growth might be the most suitable stage for predicting yield losses from symptom observations. In both cultivars studied (Bintje, highly susceptible, and Désirée, moderately resistant), the yield of symptomless plants growing from inoculated seed tubers was significantly less than that of control plants, indicating that the presence of bacteria on the seed tuber was detrimental, even in the absence of visible symptoms. Differences in symptom expression in the field between cultivars matched the level of visible infection of tubers at harvest, as Bintje tubers showed a higher incidence of rot than Désirée tubers.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Inoculation method and concentration affected symptom development.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- method of inoculation and inoculum concentratione0
- Interactor
- Erwinia carotovora ssp. atroseptica
Pectobacterium atrosepticumt0pathogen - Outcome
- development of symptomse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The method of inoculation and inoculum concentration proved major factors for the subsequent development of symptoms.”
t0“Erwinia carotovora ssp. atroseptica under field conditions and their effects on the yield of individual potato plants”
Claim · model-written summary
Vacuum infiltration caused more severe disease than contaminated sand.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- vacuum infiltration of bacteria into seed tuberse0
- Interactor
- Erwinia carotovora ssp. atrosepticaPectobacterium atrosepticumt0pathogen
- Outcome
- Disease developmente0
- Direction
- more severee0
- Comparator
- shaking tubers in contaminated sande0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Disease development was more severe after vacuum infiltration of bacteria into seed tubers than after shaking tubers in contaminated sand.”
t0“Erwinia carotovora ssp. atroseptica under field conditions and their effects on the yield of individual potato plants”
Claim · model-written summary
Disease generally progressed from chlorosis or wilting to desiccation.
- Taxon
- potatoSolanum tuberosumt0
- Interactor
- Erwinia carotovora ssp. atrosepticaPectobacterium atrosepticumt0pathogen
- Outcome
- chlorosis and/or wilting to partial or total desiccatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Disease usually progressed from chlorosis and/or wilting to partial or total desiccation on a given plant.”
t0“Erwinia carotovora ssp. atroseptica under field conditions and their effects on the yield of individual potato plants”
Claim · model-written summary
Yield losses varied by symptom type and scoring date.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- symptom typee0
- Outcome
- Yield lossese0
- Qualifier
- scoring datese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield losses varied according to symptom type, but the relationship between symptoms recorded and yield also depended on scoring dates.”
t0“Erwinia carotovora ssp. atroseptica under field conditions and their effects on the yield of individual potato plants”
Claim · model-written summary
Symptomless plants from inoculated seed tubers of both cultivars yielded less than controls.
- Taxon
- potatoSolanum tuberosumt0
- Material
- Bintjee0
- Treatment
- inoculated seed tuberse0
- Interactor
- Erwinia carotovora ssp. atrosepticaPectobacterium atrosepticumt0pathogen
- Outcome
- yield of symptomless plantse0
- Direction
- lesse0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both cultivars studied (Bintje, highly susceptible, and Désirée, moderately resistant), the yield of symptomless plants growing from inoculated seed tubers was significantly less than that of control plants”
t0“Erwinia carotovora ssp. atroseptica under field conditions and their effects on the yield of individual potato plants”
Claim · model-written summary
Bintje tubers had more rot than Désirée tubers.
- Taxon
- potatoSolanum tuberosumt0
- Material
- Bintjee0
- Interactor
- Erwinia carotovora ssp. atrosepticaPectobacterium atrosepticumt0pathogen
- Outcome
- incidence of rote0
- Direction
- highere0
- Comparator
- Désiréee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bintje tubers showed a higher incidence of rot than Désirée tubers.”
t0“Erwinia carotovora ssp. atroseptica under field conditions and their effects on the yield of individual potato plants”
The same questions in other papers
inoculation · Pectobacterium atrosepticum · Solanum tuberosum (potato)Positive and negative results
4 papers in the same direction as this paper · 3 in the opposite direction
- positive
- no effect
- positive
4 papers more in this group
See all 8 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.