Seed germination is critical for crop production and is sensitive to abiotic stresses. Considering that nitric oxide (NO) has been shown to ameliorate the negative effects of abiotic stress in several plants, we investigated the effect and mechanisms of exogenous NO in wheat seed germination under Fe stress, focusing on oxidative stress. Specifically, seeds of the wheat cultivar 'Ningchun 4' were treated with 1 mM FeCl