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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
Inhibition, Inactivation, and Recovery of Ammonia-Oxidizing Activity in Cometabolism of Trichloroethylene by Nitrosomonas europaea.
The kinetics of the cometabolism of trichloroethylene (TCE) by the ammonia-oxidizing soil bacterium Nitrosomonas europaea in short-term (<10-min) incubations were investigated. Three individualExpand
Induction of ammonia monooxygenase and hydroxylamine oxidoreductase mRNAs by ammonium in Nitrosomonas europaea
In Nitrosomonas europaea, ammonia monooxygenase (AMO) and hydroxylamine oxidoreductase (HAO) catalyse the oxidation of ammonia (NH3) to nitrite (NO2−). A transcript of 3500 bases hybridizes to probesExpand
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
Nickel as a micronutrient element for plants.
The detrimental effects of excessive Ni on plant growth have been well known for many years. More recent evidence indicates that Ni is required in small amounts for normal plant growth andExpand
Hydrogenase in Rhizobium japonicum Increases Nitrogen Fixation by Nodulated Soybeans
Some Rhizobium strains synthesize a unidirectional hydrogenase system in legume nodule bacteroids; this system participates in the recycling of hydrogen that otherwise would be lost as a by-productExpand
Expression of hydrogenase activity in free-living Rhizobium japonicum.
A medium is described on which selected Rhizobium japonicum strains express hydrogenase (H(2) uptake) activity under free-living conditions. Low concentrations of carbon substrates, decreased oxygenExpand
Physiology, biochemistry, and genetics of the uptake hydrogenase in rhizobia.
INTRODUCTION . . ...... ... , . . . . . . ,', . . . . . . . . . , . . . . . . . , . . . . . ,', . . . . . . ,', . . . ,',.,. . . . . . . . . 335 DlHYDROGEN EVOLUTION DURING N2 FIXATION ... . ... . .Expand
Nickel: A micronutrient element for hydrogen-dependent growth of Rhizobium japonicum and for expression of urease activity in soybean leaves.
Soybean plants and Rhizobium japonicum 122 DES, a hydrogen uptake-positive strain, were cultured in media purified to remove Ni. Supplemental Ni had no significant effect on the dry matter or total NExpand
Yield and N Content of Soybean Seed as Influenced by Rhizobium japonicum Inoculants Possessing the Hydrogenase Characteristic1
Rhizobium japonicum strains possessing the hydrogenase characteristic (Hup⁺) are capable of forming nodules that recycle the H₂ produced during N₂ fixation. Experiments were conducted to compare seedExpand