Fig. 9From: Primary root response to combined drought and heat stress is regulated via salicylic acid metabolism in maizeSalicylic acid biosynthesis and signal transduction pathway. The expression levels of DEGs were standardized, and the log10(Gene Expression) was calculated. Red represented genes with high expression. The black double line is the cell membrane and the grey dotted line is the nuclear membrane. The blue squares indicated that the metabolites were not measured. “?” indicated that an enzyme has not been confirmed. The pathway referred to the map00400, map00360, and map04075 in the KEGG database and we have obtained the permission from the Kanehisa laboratoryBack to article page