Title Mitigating effect of nano‑zerovalent iron, iron sulfate and EDTA against oxidative stress induced by chromium in Helianthus annuus L. Type of Research Article Keywords Helianthus annuus L. · Heavy metal · Physiological alterations · Reactive oxygen species · Reducing and chelating agents · Nanoparticle Abstract Mitigating effect of nano‑zerovalent iron, iron sulfate and EDTA against oxidative stress induced by chromium in Helianthus annuus L Researchers Hamid Mohammadi (First Researcher)، Mehrnaz Hatami (Second Researcher)، Khatoon Feghzadeh (Third Researcher)، Mansour Ghorbanpour (Fourth Researcher)