Heterologous Expression of Human Metallothionein Gene <i>HsMT1L</i> Can Enhance the Tolerance of Tobacco (<i>Nicotiana nudicaulis</i> Watson) to Zinc and Cadmium.

Under 200 mg/kg of Cd 2+ , the Cd 2+ contamination in the shoots and roots of transgenic plants was 24.6−30.5% and 45.5−51.3% higher than that of the WT, respectively ( Figure 4 c,d), and all of the transgenic lines showed a highly significant difference compared with the WT ( p < 0.0001).

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