ABC	ATP-binding cassette transporter superfamily
CaCA	Cation/calcium superfamily
CAL1	Cadmium accumulation in leaf 1
CCXs	Cation/Ca exchangers
Cd	Cadmium
CDF	Cation diffusion facilitator
CKK	Cho Ko Koku
Cu	Copper
DVB	Diffuse vascular bundle
EVB	Enlarged vascular bundle
HMA	Heavy metal ATPase
Hsf	Heat shock transcription factor
lc5	Low cadmium 5
LCT	Low-affinity cation transporter
lncRNAs	Long non-coding RNAs
MAS	Marker-assisted breeding
MFS	Major facilitator superfamily
miRNAs	microRNAs
MPF	Membrane protein family
MTPs	Metal tolerance proteins
NRAMP	Natural resistance-associated macrophage protein
OsHB4	Homeodomain-containing protein 4
PCB	Parenchyma cell bridge
PSI	Photosystem I
PSII	Photosystem II
TVB	Transit vascular bundle
WT	Wild-type
Zn	Zinc
ZRTs	Zn-regulated transporters