Metal nanoparticles serves as plant growth regulators

Engineered nanomaterials (EMs) negatively or positively affect plant growth and development attributed to their physiochemical properties, application, and concentrations. Previous studies have shown that ferroferric oxide (Fe3O4) nanoparticles affect tobacco (Nicotiana tabacum) seed germination in size- and dosage-dependent manners. However, little attention has been paid to EMs mediated tobacco response to heavy metals.