The functions of inter- and intracellular glutathione transport systems inplants

Glutathione is one of the major redox buffers in most aerobic cells, and it has a broad spectrum of functions in plants. Recent discoveries implicate this thiol peptide in signalling and cellular homeostasis. Glutathione can sense intracellular redox status: perturbations of glutathione reduction st ate are transduced into changes in gene expression. This central role deman ds precise control of both the concentration and the reduction state of glu tathione in different compartments. In addition to the regulation of glutat hione biosynthesis and redox state, attention is now turning to the role of glutathione transporters.