Fig. 6

Potential Migration and Chemical Transformation of Ag NPs, AgNO₃, and Ag₂S NPs Across Seed Coats [115]. a Ag NPs forms thiolate complexes in the internal layer of seed coat (parenchyma cells); b AgNO₃ would form AgCl precipitate in the external layer of seed coat (epidermis); c Ag₂S NPs could cross seed coat without significant chemical modifications