Fig. 1 Two-dimensional plot of principal components analysis of fatty acid methyl ester (FAME) profiles of the bacterial isolates tested plus the plant growth–promoting rhizobacteria (PGPR) control, Pseudomonas putida PH6. The x- and y- axes are in Euclidean distance. Isolates are identified as (i) increasing some aspect of soybean growth (solid triangle), (ii) not increasing some aspect of soybean growth (open square), and (iii) not tested in plant (open circle)

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