REVIEW ARTICLE Glutathione: biosynthesis, metabolism and relationship to stress tolerance explored in transformed plants

Glutathione is found in the vast majority of prokaryoticCrucial roles in sulphur metabolism and plant defence and eukaryotic cells, where it often represents the majorhave been described in recent years for the tripeptide pool of non-protein reduced sulphur ( Kunert and Foyer,thiol glutathione. In spite of this, the metabolism of 1993). The reduced form of glutathione (GSH) is aglutathione and its response to stress condition