About the Authors
- Kari Saikkonen
- Plant Production Research, MTT Agrifood Research Finland, Jokioinen, Finland
- Piippa R. Wäli
- Department of Biology, University of Oulu, Oulu, Finland
- Marjo Helander
- Department of Biology, University of Turku, Turku, Finland
The authors have declared that no competing interests exist.
Conceived and designed the experiments: KS PRW MH. Performed the experiments: KS PRW MH. Analyzed the data: KS PRW MH. Wrote the paper: KS PRW MH.