Frankia alpina Pozzi et al. 2020 Pozzi A.C.M. Herrera-Belaroussi A. Schwob G. Bautista-Guerrero H.H. Bethencourt L. Fournier P. Dubost A. Abrouk D. Normand P. Fernandez M.P. Proposal of 'Candidatus Frankia alpina', the uncultured symbiont of Alnus alnobetula and A. incana that forms spore-containing nitrogen-fixing root nodules. 2020 70 10 5453 5459 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.004433 32910750