AA	ascorbic acid
ANS	anthocyanin synthase
4CL	4-coumarate CoA ligase
C4H	cinnamate 4-hydroxylase
CHI	chalcone isomerase
CHS	chalcone synthase
DFR	dihydroflavonol 4-reductase
DoANS	gene encoding anthocyanin synthase from Dendrobium officinale
DoUFGT	gene encoding UDP-glucose flavonoid 3-O-glucosyltransferase from Dendrobium officinale
DPPH	2,2-diphenyl-1-picryhydrazyl
DW	dry weight
F3H	flavanone 3-hydroxylase
F3′H	flavonoid 3′-hydroxylase
F3′5′H	flavonoid 3′5′-hydroxylase
FLS	flavonol synthase
GC-MS	gas chromatography-mass spectrometry
ORF	open reading frame
PAL	phenylalanine ammonia lyase
qRT-PCR	quantitative real time polymerase chain reaction
SD	standard deviation
UFGT	UDP-glucose flavonoid 3-O-glucosyltransferase
UPLC-QTOF-MS	Ultra-performance liquid chromatography/quadrupole time-of-flight mass spectrometry