1. Department of Plant Physiology, Umeå Plant Science Centre; Umeå University; Umeå Sweden
2. Department of Ecology and Environmental Science, Umeå Plant Science Centre; Umeå University; Umeå Sweden
3. Department of Plant Biology, Uppsala BioCenter; Swedish University of Agricultural Sciences; Uppsala Sweden
4. Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre; Swedish University of Agricultural Sciences; Umeå Sweden