KEGG enrichment of metabolites
KEGG analysis identified four significant pathways related with amino
acids (alanine, cyano amino acid, phenylalanine, alanine aspartate and
glutamate) in wheat. Similar with wheat, metabolisms associated with
amino acids (Alanine, phenylalanine, cysteine, methionine and
pyrimidine) and nucleotides (purine and pyrimidine) were significantly
enriched in rice. These results suggest that O3 affects
the synthesis of certain amino acids in wheat and rice. In soybean, in
addition to amino acid metabolism, the biosynthesis of alkaloids and
terpenoids were also altered by O3 (Fig. 5).