Table 4. Effect of elevated CO₂ on fold changes of major metabolites in broomcorn millet.

Index	Compounds	Class	LogFC
pma1116	Kaempferide	Flavonol	1.16
pma6496	Luteolin 6-C-glucoside	Flavone C-glycosides	1.14
pmb0503	N-(4′-O-glycosyl)-p-coumaroyl agmatine	Phenolamides	1.62
pmb0588	Luteolin 3′,7-di-O-glucoside	Flavone	1.24
pmb0607	Chrysoeriol 7-O-hexoside	Flavone	1.00
pmb0608	Chrysoeriol O-malonylhexoside	Flavone	1.34
pmb0624	6-C-hexosyl-luteolin O-hexoside	Flavone C-glycosides	1.02
pmb0626	6-C-hexosyl-apigenin O-hexosyl-O-hexoside	Flavone C-glycosides	1.81
pmb0628	Eriodictiol C-hexosyl-O-hexoside	Flavone C-glycosides	1.08
pmb0639	8-C-hexosyl-apigenin O-hexosyl-O-hexoside	Flavone C-glycosides	1.13
pmb2954	Luteolin O-hexosyl-O-hexosyl-O-hexoside	Flavone	1.25
pmb3024	Luteolin C-hexoside	Flavone C-glycosides	1.00
pmb3061	5-O-p-coumaroyl quinic acid O-hexoside	Quinate and its derivatives	1.95
pmb3064	3-O-p-coumaroyl quinic acid O-hexoside	Quinate and its derivatives	2.03
pme0113	γ-Glu-Cys	Amino acid derivatives	1.51
pme0534	Gluconic acid	Carbohydrates	1.40
pme1261	Pantothenol	Alcohols and polyols	1.68
pme1944	D-Mannitol	Alcohols and polyols	1.15
pmb0069	Benzamide	Others	−1.07
pmb0770	N-Feruloyl serotonin	Tryptamine derivatives	−3.35
pmb0771	N-Feruloyl tyramine	Phenolamides	−3.72
pmb2653	D(+)-Melezitose O-rhamnoside	Carbohydrates	−2.38
pmb2850	Tricin	Flavone	−1.19
pmb2855	L-Glutamine O-hexside	Amino acid derivatives	−1.10
pmb2873	3-(2-Naphthyl)-D-alanine	Amino acid derivatives	−1.49
pmc1990	4′-Hydroxy-5,7-dimethoxyflavanone	Flavanone	−1.09
pme0026	L-(+)-Lysine	Amino acids	−1.44
pme0324	Chrysin	Flavone	−1.53
pme1408	L-Glutamine	Amino acids	−1.24
pme1496	Formononetin (4′-O-methyldaidzein)	Isoflavone	−2.25
pme1502	Kumatakenin	Flavonol	−1.07
pme2773	L-Cystathionine	Amino acid derivatives	−1.39
pme2827	Palmitaldehyde	Lipids_Fatty acids	−1.16
pme3288	3,7-Di-O-methylquercetin	Flavonol	−1.87
pme3292	Prunetin	Isoflavone	−8.55
pme3459	Caffeyl alcohol	Hydroxycinnamoyl derivatives	−2.07