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Athukorala, Wijesuriya Arachchige Anushka Priyangi, 2021. Determining Leptosphaeria species on Swedish oilseed rape and monitoring responses to Fusarium avenaceum and Fusarium graminearum in timothy populations. Second cycle, A2E. Uppsala: SLU, Dept. Of Plant Biology

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Abstract

Background
Phoma stem canker or black leg disease is one of the most important disease affecting the oil seed rape worldwide. The disease is caused by the two pathogen species Leptosphaeria maculans and L. biglobosa. In this study genomic information of L. maculans and L. biglobosa was used to determine their presence in materials collected in the county of Sk ne, southern Sweden in 2020. The second part was carried out to understand if timothy is susceptible to pathogens that also cause disease on red clover. Sclerotinia trifoliorum, Fusarium avenaceum and F. graminearum were used to score their pathogenicity on timothy.
Results
The results showed that L. maculans and L. biglobosa co-existed in the oilseed rape stem master samples from the five fields analyzed. Pathogenicity observations showed that F. avenaceum and F. graminearum can cause symptoms similar to crown rot and root rot diseases seen on other crops whereas S. trifoliorum did not incite any disease.
Conclusion
This work should be seen as first preliminary data on potential disease problems in Sweden. Leptosphaeria maculans and L. biglobosa are now established in southern part of the country. These fungal pathogens constitute a potential future threat to Brassica crops particularly in light of climate change. Fusarium avenaceum and F. graminearum cause symptoms on timothy similar to root rot and crown rot on red clover and cereals. If the results could be further validated, they call for new efforts on resistance breeding.

Main title:Determining Leptosphaeria species on Swedish oilseed rape and monitoring responses to Fusarium avenaceum and Fusarium graminearum in timothy populations
Authors:Athukorala, Wijesuriya Arachchige Anushka Priyangi
Supervisor:Dixelius, Christina
Examiner:Kvarnheden, Anders
Series:Examensarbete / Institutionen för växtbiologi, SLU
Volume/Sequential designation:186
Year of Publication:2021
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:SM006 Plant Biology for Sustainable Production - Master's programme, 120.0hp
Supervising department:(NL, NJ) > Dept. Of Plant Biology
Keywords:Leptosphaeria maculans, Leptospharia biglobosa, Fusarium avenaceum, Fusarium graminearum, Sclerotinia trifoliorum, black leg disease, root rot and crown rot
URN:NBN:urn:nbn:se:slu:epsilon-s-16850
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-16850
Subjects:Crop husbandry
Language:English
Deposited On:29 Jun 2021 06:25
Metadata Last Modified:02 Jul 2021 12:11

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