Abstract
Levels of asparaginase activity from developing pea leaves (Pisum sativum) were found to change on a daily basis, increasing during the light period and decreasing in the dark. During extended periods of light, high levels of activity were maintained, while prolonged dark reduced activity to a low value. Half-expanded leaves exhibited the greatest change in activity over the photoperiod. Very young or mature leaves displayed little or no diurnal variation in asparaginase activity.
Full text
PDF


Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Atkins C. A., Pate J. S., Sharkey P. J. Asparagine metabolism-key to the nitrogen nutrition of developing legume seeds. Plant Physiol. 1975 Dec;56(6):807–812. doi: 10.1104/pp.56.6.807. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Bauer A., Urquhart A. A., Joy K. W. Amino Acid metabolism of pea leaves: diurnal changes and amino Acid synthesis from N-nitrate. Plant Physiol. 1977 May;59(5):915–919. doi: 10.1104/pp.59.5.915. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Chang K. S., Farnden K. J. Purification and properties of asparaginase from Lupinus arboreus and Lupinus angustifolius. Arch Biochem Biophys. 1981 Apr 15;208(1):49–58. doi: 10.1016/0003-9861(81)90122-3. [DOI] [PubMed] [Google Scholar]
- Dunlop P. C., Meyer G. M., Roon R. J. Nitrogen catabolite repression of asparaginase II in Saccharomyces cerevisiae. J Bacteriol. 1980 Jul;143(1):422–426. doi: 10.1128/jb.143.1.422-426.1980. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Knight T. J., Weissman G. S. Rhythms in glutamine synthetase activity, energy charge, and glutamine in sunflower roots. Plant Physiol. 1982 Dec;70(6):1683–1688. doi: 10.1104/pp.70.6.1683. [DOI] [PMC free article] [PubMed] [Google Scholar]
- O'Neal D., Joy K. W. Glutamine synthetase of pea leaves. I. Purification, stabilization, and pH optima. Arch Biochem Biophys. 1973 Nov;159(1):113–122. doi: 10.1016/0003-9861(73)90435-9. [DOI] [PubMed] [Google Scholar]
- Paul J. H., Cooksey K. E. Regulation of L-asparaginase in a Chlamydomonas species in response to ambient concentrations of combined nitrogen. J Bacteriol. 1981 Jul;147(1):9–12. doi: 10.1128/jb.147.1.9-12.1981. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Roon R. J., Murdoch M., Kunze B., Dunlop P. C. Derepression of asparaginase II during exponential growth of Saccharomyces cerevisiae on ammonium ion. Arch Biochem Biophys. 1982 Nov;219(1):101–109. doi: 10.1016/0003-9861(82)90138-2. [DOI] [PubMed] [Google Scholar]
- Sodek L. Distribution and Properties of a Potassium-dependent Asparaginase Isolated from Developing Seeds of Pisum sativum and Other Plants. Plant Physiol. 1980 Jan;65(1):22–26. doi: 10.1104/pp.65.1.22. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Urquhart A. A., Joy K. W. Transport, metabolism, and redistribution of xylem-borne amino acids in developing pea shoots. Plant Physiol. 1982 May;69(5):1226–1232. doi: 10.1104/pp.69.5.1226. [DOI] [PMC free article] [PubMed] [Google Scholar]
