Fig. 4

KEGG enrichment analysis of metabolites altered by S. oryzae infection. a The aminoacyl-tRNA biosynthesis pathway was dramatically enriched in K-starved plants after infection. b The aminoacyl-tRNA biosynthesis pathway was dramatically enriched in K-sufficient plants after infection. c The phenylpropanoid biosynthesis pathway was significantly enriched in K-starved plants versus K-sufficient plants before inoculation. d The linoleic acid metabolism pathway was dramatically enriched in K-starved plants versus K-sufficient plants upon S. oryzae infection. Orthogonal partial least squares discriminant analysis was used to evaluate the variable importance on the projection (size of the solid circle), and Student’s t-test (p-value < 0.05 denotes significance) was used to analyze the abundance of the metabolites. The color of the circle represents the − log₁₀ (p-value)