Genetic resistance and tumour morphology in birch infected with Taphrina betulina

Show simple item record Christita, Margaretta Overmyer, Kirk 2021-08-19T13:19:01Z 2021-08-19T13:19:01Z 2021-08
dc.identifier.citation Christita , M & Overmyer , K 2021 , ' Genetic resistance and tumour morphology in birch infected with Taphrina betulina ' , Forest pathology , vol. 51 , no. 4 , 12709 .
dc.identifier.other PURE: 166839854
dc.identifier.other PURE UUID: 6ffe3fc6-81b8-4028-859d-c1176f91f230
dc.identifier.other WOS: 000668289100001
dc.identifier.other ORCID: /0000-0002-7398-3453/work/98707677
dc.identifier.other ORCID: /0000-0002-3289-2379/work/98709401
dc.description.abstract Witches' broom of birch (Betula spp.) caused by Taphrina betulina is an understudied disease that causes the formation of woody tumours, from which ectopic axillary buds and branches grow to form a broom-like structure. We have addressed two aspects of this disease using naturally infected mature trees in the field. Broom symptoms offer a convenient means of scoring susceptibility in the field. Variation in broom symptom presentation suggests possible variation in resistance against witches' broom disease. We tracked the local distribution of susceptible individuals among 721 trees at 159 independent sites. The analysis supports the hypothesis that there was genetic resistance segregating in these birch populations. Anatomical changes in broom symptom bearing branches of European silver birch (Betula pendula) were also addressed by comparing sections of tissues from three locations in the same branch, which were normal, swollen in infected tissue adjacent to a tumour, and inside a tumour. Examination of tumours revealed disorganized and swollen xylem, expanded secondary phloem and expanded periderm. Swollen tissues newly infected from spreading disease adjacent to tumours exhibited enhanced growth only in secondary phloem and the periderm, which also exhibited distortions. This finding suggests that tumour formation and possibly pathogen colonization may initiate in these tissues. en
dc.format.extent 8
dc.language.iso eng
dc.relation.ispartof Forest pathology
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject Betula pendula
dc.subject birch
dc.subject disease symptoms
dc.subject genetic resistance
dc.subject Taphrina betulina
dc.subject tumour growth
dc.subject tumours
dc.subject witches' broom disease
dc.subject 4112 Forestry
dc.subject 11831 Plant biology
dc.title Genetic resistance and tumour morphology in birch infected with Taphrina betulina en
dc.type Article
dc.contributor.organization Organismal and Evolutionary Biology Research Programme
dc.contributor.organization Plant-Fungal Interactions Group
dc.contributor.organization Biosciences
dc.contributor.organization Viikki Plant Science Centre (ViPS)
dc.description.reviewstatus Peer reviewed
dc.relation.issn 1437-4781
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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