Hydrogen peroxide—a central hub for information flow in plant cells

Abstract. Background: Hydrogen peroxide (H2O2) was initially recognized as a toxic reactive oxygen species, able to cause damage to a variety of cellular structures. However, it became clear in the last decade that H2O2 can also act as a potent signalling molecule, involved in a plethora of physiological functions. Scope: In the present review, we offer a brief summary of H2O2 signalli…