Endogenous nitric oxide and its potential sources regulate glutathione induced cadmium stress tolerance in maize plants ScienceDirect Glutathione is such a critical soldier in our line of defense that our bodies make it themselves. We even have mechanisms that recycle and reuse it. But what happens when our toxic Role of Nitric Oxide, Glutathione and Sulfhydryl Groups in Zinc Homeostasis in Plants Full article: Nitric oxide in plants: an insight on redox activity and responses toward abiotic stress signaling