Fig. 5

A Functional classification of unique differentially expressed proteins in SD609 under drought stress. B Functional classification of unique differentially expressed proteins in SD902 under drought stress. C Functional classification of shared differentially expressed proteins in two maize varieties under drought stress. D Bubble plot for KEGG pathway enrichment of DEPs in SD609. X-axis represents the number of mapping proteins and y-axis descripts the enrichment scores (−log₁₀ [enrichment P-value]). The bubble size indicates the proteins expression in the KEGG pathways ((abs (log₂fold change)) *2). E Bubble plot for KEGG pathway enrichment of DEPs in SD902