Table 3.

The metallothioneins genes are involved in heavy metal tolerance.

Genes	Plant	References
MT1a MT1c	Arabidopsis thaliana, Cicer arietinum	Cobbett and Goldsbrough, 2002; Chaudhary et al., 2018
MT2a, MT2b	Arabidopsis thaliana, Thlaspi caerulescens	Cobbett and Goldsbrough, 2002
MT3	Arabidopsis thaliana, Thlaspi caerulescens	Cobbett and Goldsbrough, 2002
GHMT3	Nicotiana tabacum	Chaudhary et al., 2018
Mt4a-Ec-2	Arabidopsis thaliana, Triticum aestivum	Shukla et al., 2016
MT4b-Ec-1	Arabidopsis thaliana, Triticum aestivum	Shukla et al., 2016
pttMT2b	Arabidopsis thaliana	Chaudhary et al., 2018