4CL	4-coumarate-CoA ligase
ANR	Anthocyanidin reductase
C4H	Trans-cinnamate 4-monooxygenase
CCoAOMT	Caffeoyl-CoA O-methyltransferase
CHI	Chalcone isomerase
CHS	Chalcone synthase
DEG	Differential expressed gene
DFR	Dihydroflavonol reductase
DHK	Dihydrokaempferol
DHM	Dihydromyricetin
DHQ	Dihydroquercetin
EBGs	Early biosynthesis genes
EGC	Epigallocatechin
F3′5′H	Flavonoid 3′5′- hydroxylase
F3′H	Flavonoid 3′-hydroxylase
F3H	Flavanone 3-hydroxylase
FLS	Flavonol synthase
KEGG	Kyoto Encyclopedia of Genes and Genomes
LAR	Leucoanthocyanidin reductase
LBGs	Late biosynthetic genes
LDOX/ANS	Leucoanthocyanidin dioxygenase/anthocyanidin synthase
MBW	MYB-bHLH-WD40
ML	Mature leaves
MS/MS	Tandem mass spectrometry
MWDB	MetWare database
MYB	v-myb avian myeloblastosis viral oncogene homolog
OPLS-DA	Orthogonal partial least squares-discriminant analysis
PA	Proanthocyanidin
PAL	Phenylalanine ammonia lyase
PCA	Principal component analysis
PCC	Pearson correlation coefficient
PCCP	p-value of Pearson correlation coefficient
UFGT	UDP-glucose:flavonoid 3-glucosyltransferase
UPLC	Ultra-performance liquid chromatography
VIP	Variable importance in projection
YL	Young leaves