University of Oulu

Kaitera J., Kauppila T., Hantula J. (2021). Assessment of the potential of Norway-spruce-seed-orchard associated plants to serve as alternate hosts of Thekopsora areolata. Silva Fennica vol. 55 no. 2 article id 10446.

Assessment of the potential of Norway-spruce-seed-orchard associated plants to serve as alternate hosts of Thekopsora areolata

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Author: Kaitera, Juha1; Kauppila, Tuomas2; Hantula, Jarkko3
Organizations: 1Natural Resources Institute Finland (Luke), Natural Resources, FI-90570 Oulu, Finland
2Botanical Gardens, University of Oulu, FI-90014 Oulu, Finland
3Natural Resources Institute Finland (Luke), Natural Resources, FI-00790 Helsinki, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.9 MB)
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Language: English
Published: Finnish Society of Forest Science, 2021
Publish Date: 2021-06-24


The alternate host range of cherry-spruce rust is poorly studied although such information could be important in protecting spruce seed orchards from infections. Pathogenicity of cherry-spruce rust, Thekopsora areolata (Fr.) Magnus, was investigated on potential alternate host species in a greenhouse and in a laboratory in Finland. Five common species of Ericaceae, Vaccinium myrtillus L., V. uliginosum L., V. vitis-idaea L., Empetrum nigrum L. and Arctostaphylos uva-ursi (L.) Spreng, were inoculated in the greenhouse using aeciospores from seven Norway spruce [Picea abies (L.) H. Karst.] seed orchards suffering from T. areolata in 2018. In addition, young detached leaves of Vaccinium spp. and 17 other plant species of ground vegetation from eight Norway spruce seed orchards were inoculated with aeciospores from six seed orchards in the laboratory in 2019. Also, young leaves of Prunus padus L. trees growing within the seed orchards or close to them were inoculated as controls. None of the inoculated leaves of the potential alternate hosts formed uredinia either in the greenhouse or in the laboratory. In contrast, leaves of P. padus from the seed orchards were infected by the six spore sources from six seed orchards and produced uredinia. As T. areolata spores were able to infect only P. padus, but not the other tested species belonging to ground flora, it was concluded that T. areolata disperses only via Prunus spp. in Finnish seed orchards.

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Series: Silva Fennica
ISSN: 0037-5330
ISSN-E: 2242-4075
ISSN-L: 0037-5330
Volume: 55
Issue: 2
Article number: 10446
DOI: 10.14214/sf.10446
Type of Publication: A1 Journal article – refereed
Field of Science: 1181 Ecology, evolutionary biology
Funding: This study belonged to the MESIKE project that was financed by the Finnish Ministry of Agriculture and Forestry.
Copyright information: © 2021 The Authors. Licensed CC BY-SA 4.0.