Hydrogen peroxide‐ and glutathione‐associated mechanisms of acclimatory stress tolerance and signalling

摘要: Plants adapt to environmental stresses through specific genetic responses. The molecular mechanisms associated with signal transduction, leading changes in gene expression early the stress response, are largely unknown. It is clear, however, that acclimatory responses sensitive redox state of cell. Of many components which contribute balance cell, two factors have been shown be crucial mediating Thiol/disulphide exchange reactions, particularly involving glutathione pool and generation oxidant H2O2, central transduction both biotic stresses. These molecules multifunctional triggers, modulating metabolism expression. Both able cross biological membranes diffuse or transported long distances from their sites origin. Glutathione H2O2 may act alone unison, intracellular systemic signalling systems, achieve acclimation tolerance abiotic