Fig. 7From: Exogenous spermidine improves seed germination of sweet corn via involvement in phytohormone interactions, H2O2 and relevant gene expressionEffects of soaking treatments on the localization of H2O2 in sweet corn seed embryos and radical tip. a Histochemical localization of hydrogen peroxide (H2O2) in seed embryos. Control, soaking with distilled water; Spd, soaking with spermidine; CHA, soaking with cyclohexylamine. The seed embryos were isolated from seeds after 0 and 12 h of imbibition in rolled towels moistened with water at 25 °C. Bars, 2 mm. b Fluorescence localization of H2O2 in seed radical tip. The seed radicals were isolated from seed embryos after 0 and 12 h of imbibition. The presence of H2O2 was shown by green fluorescence. Bars, 50 μmBack to article page