Figure 1

Overview of the maize callus and the metabolomic responses to induction medium in 18R and B73. (a) Photos of a single callus of 18R and B73 induced for 15 d. (b) Principal component analysis based on metabolite profiles of maize 18R and B73 inbred lines in 3 stages. “18R”: 18R; “C”: control; “I”: stage I; “II”: stage II; “III”: stage III. (c) Numbers of individual mass spectrometry features that were significantly changed (fold change >1.5, Q value < 0.05) at each stage in each line. (d) Venn diagram of significantly up- and down-regulated m/z in 18R and B73 at each stage. “I/C”: stage I relative to control, as well as “II/C,” “III/C.”