Viewing oxidative stress through the lens of oxidative signalling rather than damage

Abstract

Concepts of the roles of reactive oxygen species (ROS) in plants and animals have shifted in recent years from focusing on oxidative damage effects to the current view of ROS as universal signalling metabolites. Rather than having two opposing activities, i.e. damage and signalling, the emerging concept is that all types of oxidative modification/damage are involved in signalling, not least in the induction of repair processes. Examining the multifaceted roles of ROS as crucial cellular signals, we highlight as an example the loss of photosystem II function called photoinhibition, where photoprotection has classically been conflated with oxidative damage.

The regulation of P700 is an important photoprotective mechanism to NaCl‐salinity in Jatropha curcas

“…Under salinity, J. curcas did not present PSII photoinhibition, because F v /F m was at control levels and NPQ was induced (Figs and ; Foyer et al ). However, a transient regulation of PSII activity was attained, probably as an adjustment on the electron transport chain to avoid potential damage as consequence of excess energy.…”

Redox Control of Aphid Resistance through Altered Cell Wall Composition and Nutritional Quality

“…Apoplastic hydrogen peroxide has been shown to exert a strong influence on phenolic metabolism in Norway spruce (Picea abies) cell cultures and to modify lignin formation and polymerization (Laitinen et al, 2017). The ROS burst that occurs upon the perception of a physical or chemical signal triggers redox signaling pathways that regulate plant growth as well as defense Foyer et al, 2017;Kimura et al, 2017;Tang et al, 2017). ROS signaling transmits information locally through plasma membrane receptor-like kinases that modify metabolism and gene expression and systemically through processes called systemic acquired resistance and systemic acquired acclimation on environmental stress Kimura et al, 2017;Tang et al, 2017).…”

Light Signaling-Dependent Regulation of Photoinhibition and Photoprotection in Tomato

“…The management of light energy usage in photosynthesis is a key concept of 389 photosynthetic regulation (Foyer et al, 2017 by the protective component of NPQ (Foyer et al, 2017), understanding the regulation of…”