Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"Ammonium assimilation"”.
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Analysis of the ammonium assimilation pathways of the human colonic bacterium, bacteroides thetaiotaomicron
… on the nitrogen supply in the feed. Assimilated ammonium accounts for up to 70% of the microbial protein production, which satisfies up to 85% of the host protein requirements. Similar numbers for the human colon have not been determined. However, colonic bacteria are responsible for the …
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Characteristics of Nitrogen- and Iron-Limited Growth in the Diatom Phaeodactylum tricornutum, and in Natural Phytoplankton Populations.
… New Zealand). Although the characteristics of ammonium uptake have been extensively studied in marine phytoplankton, comparatively little information exists on rates of assimilation. In this study, a robust method for measuring the rate of ammonium assimilation after a transient addition of …
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A ¹⁵N study of the effects of nitrate, ammonium and nitrate plus ammonium nutrition on nitrogen assimilation in Hordeum vulgare
A review of the recent literature concerning the assimilation and utilisation of nitrate and ammonium nitrogen within plants has been presented. Barley plants (Hordeum vulgare L.cv. Clipper) were grown hydroponically under controlled environmental conditions. The aerated nutrient solutions …
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Characterizing the Response of gdhA Transformed Tobacco to Glufosinate
… plants that potentially allows an increase in ammonium assimilation. Glufosinate leads to plant death by the irreversible inhibition of glutamate synthetase (GS) leading to a disruption of subsequent GS-related processes resulting in elevated ammonium and disruption of photorespiration. …
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Respuestas ecofisiológicas al enriquecimiento de amonio en angiospermas marinas
… the parallel direct toxic effect caused by high ammonium (NH4+) concentrations on seagrasses has received little attention, in spite of some pioneer works. Adverse effects of NH4+ enrichment have been traditionally explained by internal accumulation of NH4+. To prevent toxic effects, plants must …
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An investigation of aspects of the nitrogen physiology of Helianthus annuus L
… Ashton nutrient solutions containing either 2 mM ammonium, 2 mM nitrate or 1 mM ammonium+ 1 mM nitrate as the nitrogen supply to determine the effect of these nutrients upon physiological processes within the plant. Nitrate fed plants had a larger root mass than ammonium fed plants whereas …