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Edge PA, Ricketts TR. Studies on ammonium-assimilating enzymes of Platymonas striata Butcher (Prasinophyceae). Planta. 1978;138(2):123-5doi: 10.1007/BF00391167.
Edge, P. A., & Ricketts, T. R. (1978). Studies on ammonium-assimilating enzymes of Platymonas striata Butcher (Prasinophyceae). Planta, 138(2), 123-5. https://doi.org/10.1007/BF00391167
Edge, P A, and Ricketts, T R. "Studies on ammonium-assimilating enzymes of Platymonas striata Butcher (Prasinophyceae)." Planta vol. 138,2 (1978): 123-5. doi: https://doi.org/10.1007/BF00391167
Edge PA, Ricketts TR. Studies on ammonium-assimilating enzymes of Platymonas striata Butcher (Prasinophyceae). Planta. 1978 Jan;138(2):123-5. doi: 10.1007/BF00391167. PMID: 24414005.
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Planta. 1978 Jan;138(2):123-5. doi: 10.1007/BF00391167.

Studies on ammonium-assimilating enzymes of Platymonas striata Butcher (Prasinophyceae).

Planta

P A Edge, T R Ricketts

Affiliations

  1. Department of Botany, School of Biological Sciences, The University, University Park, NG7 2RD, Nottingham, UK.

PMID: 24414005 DOI: 10.1007/BF00391167

Abstract

Platymonas striata Butcher displays significant levels of glutamate synthase (GS) (EC 2.6.1.53) and glutamine synthetase (GOGAT) (EC 6.3.1.2.), but very low levels of glutamate dehydrogenase (GDH) (EC 1.4.1.4). This suggests that the GS/GOGAT pathway is important for nitrogen assimilation. The in vitro rates of enzyme activity can however only account for about 10% of the in vivo rates of nitrogen assimilation. Nitrogen-starvation reduced GS activity to undetectable levels. On nitrate or ammonium ion refeeding the cellular GS activity was rapidly restored, and reached levels of 56% and 91% greater than the unstarved values 24h after refeeding nitrate or ammonium respectively.

References

  1. J Gen Microbiol. 1965 Jan;38:21-8 - PubMed
  2. Biochem Soc Trans. 1975;3(3):381-4 - PubMed
  3. Planta. 1977 Jan;134(2):169-76 - PubMed
  4. Planta. 1977 Jan;136(2):159-62 - PubMed

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