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On the origins of nitric oxide.
Nitric oxide (NO) is widely recognized for its role as signaling compound. However, the metabolic mechanisms that determine changes in the level of NO in plants are only poorly understood, despiteExpand
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Nitrite-driven anaerobic ATP synthesis in barley and rice root mitochondria
Mitochondria isolated from the roots of barley (Hordeum vulgare L.) and rice (Oryza sativa L.) seedlings were capable of oxidizing external NADH and NADPH anaerobically in the presence of nitrite.Expand
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Nitric oxide in plants: an assessment of the current state of knowledge
BACKGROUND AND AIMS After a series of seminal works during the last decade of the 20th century, nitric oxide (NO) is now firmly placed in the pantheon of plant signals. Nitric oxide acts inExpand
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Plant hemoglobins: Important players at the crossroads between oxygen and nitric oxide
Plant hemoglobins constitute a diverse group of hemeproteins and evolutionarily belong to three different classes. Class 1 hemoglobins possess an extremely high affinity to oxygen and their mainExpand
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The anoxic plant mitochondrion as a nitrite: NO reductase.
Under the conditions of oxygen deprivation, accumulating nitrite can be reduced in the mitochondrial electron transport chain forming free radical nitric oxide (NO). By reducing nitrite to NO, plantExpand
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The emerging roles of nitric oxide (NO) in plant mitochondria.
In recent years nitric oxide (NO) has been recognized as an important signal molecule in plants. Both, reductive and oxidative pathways and different subcellular compartments appear involved in NOExpand
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In higher plants, only root mitochondria, but not leaf mitochondria reduce nitrite to NO, in vitro and in situ.
At oxygen concentrations of < or =1%, even completely nitrate reductase (NR)-free root tissues reduced added nitrite to NO, indicating that, in roots, NR was not the only source for nitrite-dependentExpand
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Regulation of Respiration and Fermentation to Control the Plant Internal Oxygen Concentration1[OA]
Plant internal oxygen concentrations can drop well below ambient even when the plant grows under optimal conditions. Using pea (Pisum sativum) roots, we show how amenable respiration adapts toExpand
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Regulation of respiration when the oxygen availability changes.
Oxygen is a vital substrate for plant energy metabolism. Since plants do not have a sophisticated mechanism to deliver oxygen to those sites where it is actually needed, a plant cell has toExpand
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Regulation of respiration in plants: a role for alternative metabolic pathways.
Respiratory metabolism includes the reactions of glycolysis, the tricarboxylic acid cycle and the mitochondrial electron transport chain, but is also directly linked with many other metabolicExpand
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