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Up-regulation of the mitochondrial alternative oxidase pathway enhances photosynthetic electron transport under drought conditions.
Results show that up-regulation of the respiratory AOX pathway protects the photosynthetic electron transport chain from the harmful effects of excess light. Expand
Temperature-dependence of mitochondrial function and production of reactive oxygen species in the intertidal mud clam Mya arenaria.
Oxygen radical formation was directly dependent on temperature-controlled respiration rates in states 3 and 4 and inversely related to mitochondrial coupling (RCR+) in state 4 and is therefore involved in cellular heat stress in this eurythermal marine ectotherm. Expand
Formation of reactive species and induction of antioxidant defence systems in polar and temperate marine invertebrates and fish.
  • D. Abele, S. Puntarulo
  • Biology, Medicine
  • Comparative biochemistry and physiology. Part A…
  • 1 August 2004
This review summarizes current knowledge on pro- and antioxidant processes in marine invertebrates and fish, and relates reactive oxygen species (ROS) formation in polar ectotherms to homeoviscous adaptations of membrane and storage lipids, as well as to tissue hypoxia and re-oxygenation during physiological stress. Expand
Nitric Oxide Is Required for Root Organogenesis1
In this report, we demonstrate that nitric oxide (NO) mediates the auxin response leading the adventitious root formation. A transient increase in NO concentration was shown to be required and to beExpand
Production of reactive oxygen species by isolated mitochondria of the Antarctic bivalve Laternula elliptica (King and Broderip) under heat stress.
Low metabolic rates at cold Antarctic temperatures keep absolute rates of mitochondrial ROS production low and control oxidative stress at habitat temperatures, but progressive mitochondrial uncoupling and formation of hazardous ROS contribute to bias mitochondrial functioning under temperature stress in vitro. Expand
Nitric Oxide is Involved in the Azospirillum brasilense-induced Lateral Root Formation in Tomato
The Azospirillum-mediated induction of lateral root formation (LRF) appears to be NO-dependent since it was completely blocked by treatment with cPTio, whereas the addition of the NO donor sodium nitroprusside partially reverted the inhibitory effect of cPTIO. Expand
Hydrogen peroxide metabolism in soybean embryonic axes at the onset of germination.
Hydrogen peroxide steady state levels of 5 micromolar were determined in soybean (Glycine max) embryonic axes incubated for 2 hours and in axes pretreated with aminotriazole or cyanide, where theseExpand
Marine invertebrate mitochondria and oxidative stress.
A new concept is proposed, showing how the cross talk of reactive O2 species in metabolically low marine invertebrates could support their outstanding hypoxia tolerance under non-stressed conditions. Expand
Iron, oxidative stress and human health.
  • S. Puntarulo
  • Chemistry, Medicine
  • Molecular aspects of medicine
  • 1 August 2005
Overall, further studies are required to assess more effective means to limit iron-dependent damage, by minimizing the formation and release of free radicals in tissues when the cellular iron steady state concentration is increased either as a consequence of disease or by therapeutic iron supplementation. Expand
Chloroplasts as a Nitric Oxide Cellular Source. Effect of Reactive Nitrogen Species on Chloroplastic Lipids and Proteins1
Data reported here suggest that NO is an endogenous metabolite in soybean chloroplasts and that reactive nitrogen species could exert either antioxidant or prooxidant effects on chloroplast macromolecules. Expand