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. 2018 Jul 2;8:9964. doi: 10.1038/s41598-018-28020-w

Figure 2.

Figure 2

Foliar secondary metabolites contents in alfalfa grown under ambient or elevated CO2 and O3. (a) Genistin, (b) Apigenin, (c) Ferulic acid, (d) p-coumaric acid, (e) Kaempferol, (f) Rutin, (g) Genistein, (h) Luteolin, and (i) Quercetin. Each value represents the average (±SE) of three replicates. Different lowercase letters indicate significant differences among the CO2 and O3 treatments within the same plant developmental stage. Different uppercase letters indicate significant differences between developmental stages within the same CO2 and O3 concentrations.