LR	Lateral root
ARF	Auxin response factor
Wild-type plants	WT
ACO	1-aminocyclopropane-1-carboxylate oxidase
AR	Adventitious root
SIMR	Stress-induced morphogenic response
LAA	Local auxin accumulation
Cd	Cadmium
HE	Cadmium/zinc co-hyperaccumulator Sedum alfredii Hance
GUS	β-glucuronidase
NPA	Naphthylphthalamic acid
IAA	Indoleacetic acid
miR390	MicroRNA390
MIR390	miR390 precursor
SaARF4-OE	Overexpression transgenic lines of SaARF4
qRT-PCR	Quantitative reverse transcription-PCR
PZA	pyrazinamide
MS	Murashige and Skoog medium
SPDE	Sequence Processing and Data Extraction
3-AT	3-amino-1,2,4-triazole
ChIP	Chromatin immunoprecipitation
IPTG	β-D-thiogalactopyranoside
Y1H	Yeastone-hybrid