Journal ArticleDOI
Scavenging of Hydrogen Peroxide in Prokaryotic and Eukaryotic Algae: Acquisition of Ascorbate Peroxidase during the Evolution of Cyanobacteria
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TLDR
Cyanobacteria can be divided into two groups, those that has and those that lacks AsA peroxidase, and the second group only scavenges hydrogen peroxide with catalase.Abstract:
Cyanobacteria can be divided into two groups, those that has and those that lacks AsA peroxidase. The first group scavenges hydrogen peroxide with the peroxidase using a photoreductant as the electron donor, and the second group only scavenges hydrogen peroxide with catalaseread more
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Journal ArticleDOI
THE WATER-WATER CYCLE IN CHLOROPLASTS: Scavenging of Active Oxygens and Dissipation of Excess Photons
TL;DR: Whenever the water-water cycle operates properly for scavenging of active oxygens in chloroplasts, it also effectively dissipates excess excitation energy under environmental stress.
Journal ArticleDOI
Ascorbate peroxidase – a hydrogen peroxide-scavenging enzyme in plants
TL;DR: Amino acid sequence and other molecular properties indicate that ascorbate peroxidase resembles cytochrome c peroxIDase from fungi rather than guaiacol per oxidase from plants, and it is proposed that the plant and yeast hydrogen peroxide-scavenging peroxidsases have the same ancestor.
Journal ArticleDOI
Desiccation tolerance of prokaryotes.
TL;DR: The present review considers a number of the features that appear to be critical to the withstanding of a long-term water deficit, including the elaboration of a conspicuous extracellular glycan, synthesis of abundant UV-absorbing pigments, and maintenance of protein stability and structural integrity.
Journal ArticleDOI
Regulation and function of ascorbate peroxidase isoenzymes
Shigeru Shigeoka,Takahiro Ishikawa,Masahiro Tamoi,Yoshiko Miyagawa,Toru Takeda,Yukinori Yabuta,Kazuya Yoshimura +6 more
TL;DR: It is clear that a high level of endogenous ascorbate is essential effectively to maintain the antioxidant system that protects plants from oxidative damage due to biotic and abiotic stresses.
Journal ArticleDOI
Tansley Review No. 112
Christine H. Foyer,Graham Noctor +1 more
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.
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