Christine H. Foyer

TL;DR: This review considers photosynthesis as a whole-cell process, in which O2 and AOS are involved in reactions at both photosystems, enzyme regulation in the chloroplast stroma, photorespiration, and mitochondrial electron transport in the light, and oxidants and antioxidants are discussed as metabolic indicators of redox status, acting as sensors and signal molecules leading to acclimatory responses.

TL;DR: The major focus of this review concerns the basic features of signaling that underpin cross-tolerance and result from the action of common elements, which are likely to occur early in the stress response cascade.

TL;DR: Since all functions thus far described for GSH in plants are related to the cysteine moiety of the tripeptide, thesehomologues may exercise similar biochemical roles to c-Key words: Oxidative stress, photorespiration, glutathione, EC-gly.

TL;DR: It is suggested that thermoprotection obtained either by spraying SA or by heat acclimation may be achieved by a common signal transduction pathway involving an early increase in H2O2.

TL;DR: The interactions between oxidants, antioxidants and redox changes leading to modified gene expression, particularly in relation to drought, are discussed, and the potential significance of photorespiratory H2O2 in signalling and acclimation is called attention.