Figure 5 – Fungal species are the main drivers ofS. meliloti core genome transcriptional response . Principal
Component Analysis (PCA) of the expression profiles from stimulons of
strains grown in the presence of the four fungal spent media. The
clustering is based on a) up-regulated and b) down-regulated DEGs
(2-fold change in expression and padj < 0.01) belonging to the
core sets. The first two components explain respectively the 55.45% and
53.05% of the total variance.