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Some aspects of the nitrogen metabolism of <i>Nodularia spumigena</i> (Cyanophyceae)
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1974
Year
EngineeringBotanyNitrogen MetabolismCyanobacteriaBiosynthesisNo 2BioenergeticsGrowth RateReactive Nitrogen SpeciePlant-rhizobia InteractionMicrobial EcologyPhotosynthesisHealth SciencesNh 4PhotosystemsAlgal BiologyPlant MetabolismBiologyPhysiologyBiotechnologyMicrobiologySymbiosisMetabolismNitrosative StressPlant Physiology
Nitrate-reducing ability, NO 2 − -reducing ability, and glutamic acid dehydrogenase levels were measured in two clones of Nodularia spumigena Mertens. Measurements with whole cells of both clones show that NO 3 − reduction is stimulated by NO 3 − , and that NO 2 − reduction is probably stimulated by NO 2 − . The NO 3 − -reducing system is stimulated by light and inhibited by NH 4 + . These controls and possible control over NH 4 + incorporation into amino acids are compared to systems operative in other organisms.Differences in growth and physiology of the clones in growth rate on N-free medium, growth inhibition by urea, and NO 2 − accumulation in the medium are discussed.