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Enzymatic reactions of ascorbate and glutathione that prevent peroxide damage in soybean root nodules.
The critical problem of oxygen toxicity for nitrogen-fixing organisms may be related to damage caused by oxygen radicals and peroxides. An enzymatic mechanism is described for removal of peroxides inExpand
Subcellular Localization of Oxygen Defense Enzymes in Soybean (Glycine max [L.] Merr.) Root Nodules
Soybean (Glycine max [L.] Merr.) root nodules contain the enzymes of the ascorbate-glutathione pathway to minimize oxidative damage. In the present study, fractionation and immunocytochemistry wereExpand
Reactive oxygen species and antioxidants in legume nodules
28 Pags.- 2 Figs. the definitive version is available at: http://onlinelibrary.wiley.com/journal/10.1111/%28ISSN%291399-3054
Recent insights into antioxidant defenses of legume root nodules.
Legume root nodules are sites of intense biochemical activity and consequently are at high risk of damage as a result of the generation of reactive oxygen species (ROS) and reactive nitrogen speciesExpand
Purification and characterization of monodehydroascorbate reductase from soybean root nodules.
Soybean (Glycine max (L.) Merr.) root nodules contain the enzymes of the ascorbate-glutathione cycle as an important defense against activated forms of oxygen. A key enzyme in thisExpand
Antioxidant Defenses of Plants and Fungi
Plants face a common problem shared by all aerobic organisms. Molecular O2 is required to meet the energy demands of metabolism, but the necessary presence of O2 leads to the multifarious risks ofExpand
Physiological Roles of Glutathione S-Transferases in Soybean Root Nodules1[C][W][OA]
Glutathione S-transferases (GSTs) are ubiquitous enzymes that catalyze the conjugation of toxic xenobiotics and oxidatively produced compounds to reduced glutathione, which facilitates theirExpand
Purification, properties, and distribution of ascorbate peroxidase in legume root nodules.
All aerobic biological systems, including N(2)-fixing root nodules, are subject to O(2) toxicity that results from the formation of reactive intermediates such as H(2)O(2) and free radicals of O(2).Expand
Physiological (antioxidant) responses of estuarine fishes to variability in dissolved oxygen.
Cycles of dissolved oxygen (DO) in estuaries can range from anoxia to various levels of supersaturation (200-300%) over short time periods. Aerobic metabolism causes formation of damaging reactiveExpand
Antioxidant defenses in the peripheral cell layers of legume root nodules.
Ascorbate peroxidase (AP) is a key enzyme that scavenges potentially harmful H2O2 and thus prevents oxidative damage in plants, especially in N2-fixing legume root nodules. The present studyExpand
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