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. 2021 Aug 30;10(9):1802. doi: 10.3390/plants10091802

Figure 1.

Figure 1

Principal component analysis (PCA) plots representing the clustering of biological replicates based on gene expression levels of (a) strain AR (E. gerundensis) in Nutrient Broth, (b) S25 (Paenibacillus sp.) in Nutrient Broth, (c) S02 (Paenibacillus sp.) in Nutrient Broth, and (d) S02 (Paenibacillus sp.) in Burk’s N-free medium. Percentage variance explained by each axis is given in brackets. Distinctive clusters that represented the presence (Barley+)/absence (Barley−) of seedlings formed along the PC1 axis, demonstrating the changes in transcriptome profiles caused by the plant–bacteria interactions.