Competition between Free and Combined Nitrogen in Nutrition of Azotobacter
- 1 September 1943
- journal article
- research article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 29 (9) , 289-294
- https://doi.org/10.1073/pnas.29.9.289
Abstract
A. vinelandii was grown in media containing sources of fixed N in presence of atmosphere with the stable isotope N15. After 15 to 40 hrs. the N15 content of the washed cells was detd. spec-trometrically. Only NH4+ and compounds readily converted into NH4+ inhibit fixation. This suggests but does not prove that ammonia may be a primary product in N fixation. Nitrates inhibit fixation after a period of "adaptation" during which the organism may develop an enzyme to convert nitrate to NH4+.This publication has 2 references indexed in Scilit:
- THE INFLUENCE OF FIXED NITROGEN ON AZOTOBACTERJournal of Bacteriology, 1930