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Principal component analysis (PCA) score plots showing the variation in plant groups from the pot experiment in Bacillus firmus-inoculated (BfL and BfH) or non-inoculated plants (NC and PC). The first three principal components (PCA 1, 2 and 3) explain more than 60% of the observed variability and are presented in the combinations (a) PCA 1–2; (b) PCA 1–3; and (c) PCA 2–3. NC—negative control; PC—positive control (nematicide); BfL—low B. firmus inoculum; BfH—high B. firmus inoculum.
