Heavy Metal | Species | Plant part | Critical toxicity (mg・kg−1) | Reference |
As | Glycine max (soybean) | Shoot | 299 | [109] |
Helianthus annus (sunflower) | Shoot | 100 | [110] | |
Zn | Glycine max (soybean) | Leaves | 229 | [111] |
Helianthus annus (sunflower) | Leaves | 190 | [112] | |
Ni | Glycine max (soybean) | Shoot | 52 | [113] |
Helianthus annus (sunflower) | Leaves | 40 | [114] |