In situ identification of intracellular bacteria related to paenibacillus spp. in the mycelium of the ectomycorrhizal fungus laccaria bicolor S238N - Bertaux, J.; Churin, J. L.; Frey-Klett, P.; Garbaye, J.; Hartmann, A.; Prevost-Boure, N. Chemidlin.; Schmid, M.