A comparison of the influence of iron on the growth and nitrate metabolism of Anabaena and Scenedesmus

Autor:	Thomas A. Storch, David R. Verstreate, Valgene L. Dunham
Rok vydání:	1980
Předmět:	biology Physiology Anabaena Nitrogen assimilation Cell Biology Plant Science General Medicine biology.organism_classification Nitrate reductase Nitrite reductase chemistry.chemical_compound Nitrate chemistry Algae Biochemistry Glutamine synthetase Genetics Scenedesmus
Zdroj:	Physiologia Plantarum. 50:47-51
ISSN:	1399-3054 0031-9317
DOI:	10.1111/j.1399-3054.1980.tb02682.x
Popis:	A comparative study of growth and nitrate metabolism of Anabaena flos-aquae (Lyng.) Breb. and Scenedesmus bijugatus var. seriatus Chodat investigated possible mechanisms for the iron-stimulated increases in growth specific for blue-green algae in mixed algal communities. Algae were separately grown in an morganic medium with varying concentrations of iron and nitrate to determine the effects on each organism. Iron was found to be a limiting nutrient for cultures of both Anabaena and Scenedesmus as determined by chlorophyll a concentrations and cell enumeration. Both iron and nitrate stimulated the specific activity of nitrate reductase, nitrite reductase, and glutamine synthetase in Anabaena. Iron enrichment did not increase the activity of the enzymes in Scenedesmus, but inhibited the activity of nitrate reductase and glutamine synthetase. The stimulation of growth by iron in cells grown under iron limiting conditions was associated with increased nitrate metabolism in Anabaena but not in Scenedesmus.
Databáze:	OpenAIRE
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