Coculture of rhizosphere isolates with Pseudomonas spp. and B. cereus UW85. (A) Competition experiments between F. johnsoniae CI04 and either Pseudomonas sp. CI14, Pseudomonas sp. RI46, or P. koreensis CI12 in three media, Luria-Bertani broth (LB), ½-strength tryptic soy broth (TSB), and soybean root exudate. (B) Rhizosphere isolates were grown alone or in coculture with P. koreensis CI12 in soybean root exudate. Colored bars under x axis indicate phylogenetic groups as in Fig. 1. (C) F. johnsoniae CI04 grown alone, in coculture with P. koreensis CI12 or B. cereus UW85, and in triple culture with P. koreensis CI12 and B. cereus UW85. Gray dotted line, limit of detection.