Abstract
We evaluated oomycete presence and abundance in the rhizosphere of wild perennial Solanum species to investigate the presence of plant pathogenic or mycoparasitic species. Furthermore, we investigated whether these plant species could function as hosts, or associated plants, for off-season survival of economically important pathogens. We collected soil samples in Sweden from Solanum dulcamara and as a control from Vitis vinifera over all four seasons of a year, and in New Zealand from Solanum nigrum and Solanum laciniatum in the summer. Species identification, confirmed by ITS and Cox2 sequencing, and root infection assays on the crop plant Solanum tuberosum and on S. dulcamara, suggested the presence of mainly Pythiales species. In Sweden, we also found evidence for the presence of Phytophthora infestans, the causal agent of potato late blight, in the rhizosphere of S. dulcamara. These Ph. infestans isolates had no negative effects on root growth of S. dulcamara in Sweden, but were more pathogenic on potato leaves than a common lab strain. Oomycete diversity measures indicated a high similarity between seasons and countries. In conclusion, our study suggests a previously unknown overwintering strategy for the pathogen Ph. infestans, indicating a possible influence of the wild species S. dulcamara on the epidemiology of potato late blight in Sweden.
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Claims 6
Claim · model-written summary
Species identification and infection assays suggested mainly Pythiales species.
- Taxon
- Solanum tuberosum
Solanum tuberosume0 - Outcome
- presence of mainly Pythiales speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Species identification, confirmed by ITS and Cox2 sequencing, and root infection assays on the crop plant Solanum tuberosum and on S. dulcamara, suggested the presence of mainly Pythiales species”
Claim · model-written summary
Phytophthora infestans was detected in the rhizosphere of S. dulcamara in Sweden.
- Taxon
- S. dulcamara
Solanum dulcamarae0 - Organ / stage
- rhizospheree0
- Interactor
- Phytophthora infestans
Phytophthora infestanse0pathogen - Outcome
- presence of Phytophthora infestanse0
- Setting
- Swedene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In Sweden, we also found evidence for the presence of Phytophthora infestans, the causal agent of potato late blight, in the rhizosphere of S. dulcamara”
Claim · model-written summary
Ph. infestans isolates had no negative effect on S. dulcamara root growth in Sweden.
- Taxon
- S. dulcamaraSolanum dulcamarae0
- Treatment
- Ph. infestans isolatese0
- Interactor
- Ph. infestanse0pathogen
- Outcome
- root growthe0
- Direction
- no negative effectse0
- Setting
- Swedene0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These Ph. infestans isolates had no negative effects on root growth of S. dulcamara in Sweden”
Claim · model-written summary
Ph. infestans isolates were more pathogenic on potato leaves than a common lab strain.
- Taxon
- Solanum tuberosumSolanum tuberosume2
- Organ / stage
- potato leavese0
- Treatment
- Ph. infestans isolatese1
- Interactor
- Ph. infestanse1pathogen
- Outcome
- pathogenic on potato leavese0
- Direction
- moree0
- Comparator
- common lab straine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were more pathogenic on potato leaves than a common lab strain”
e1“These Ph. infestans isolates had no negative effects on root growth of S. dulcamara in Sweden”
e2“crop plant Solanum tuberosum”
Claim · model-written summary
Oomycete diversity was highly similar across seasons and countries.
SolanumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oomycete diversity measures indicated a high similarity between seasons and countries”
e1“wild perennial Solanum species”
Claim · model-written summary
The authors suggest an unknown overwintering strategy for Ph. infestans associated with S. dulcamara that may affect potato late blight epidemiology in Sweden.
- Taxon
- S. dulcamaraSolanum dulcamarae0
- Interactor
- Ph. infestanse0pathogen
- Outcome
- epidemiology of potato late blighte0
- Qualifier
- previously unknown overwintering strategye0
- Setting
- Swedene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“our study suggests a previously unknown overwintering strategy for the pathogen Ph. infestans, indicating a possible influence of the wild species S. dulcamara on the epidemiology of potato late blight in Sweden”
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