Eintrag weiter verarbeiten
DISSIMILATORY REDUCTION OF 15N-LABELED NITRATE IN THE PRESENCE OF NONLABELED NO OR N2O
Gespeichert in:
| Zeitschriftentitel: | Canadian Journal of Soil Science |
|---|---|
| Personen und Körperschaften: | , , |
| In: | Canadian Journal of Soil Science, 64, 1984, 1, S. 21-29 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Canadian Science Publishing
|
| Schlagwörter: |
| Zusammenfassung: | <jats:p> Dissimilatory reduction of labeled nitrate in the presence of nonlabeled N<jats:sub>2</jats:sub>O, or NO, was studied in forest mor humus during anaerobic incubation. Data on the isotopic composition of the N<jats:sub>2</jats:sub>O and N<jats:sub>2</jats:sub> pools suggested that all of the N<jats:sub>2</jats:sub> formed had passed the N<jats:sub>2</jats:sub>O pool. This finding supported the earlier suggestion that N<jats:sub>2</jats:sub>O is an obligatory intermediate in the dissimilatory reduction of nitrate to N<jats:sub>2</jats:sub>. Due to a likely occurrence of nonenzymatic isotopic exchange between NO and nitrate, the technique used was considered unreliable to study the nature of NO as a possible intermediate in the sequence of nitrate reduction. However, qualitative observations indicated that NO was not a free, obligatory intermediate. Reduction of nitrate was strongly inhibited by the presence of NO. Reduction of N<jats:sub>2</jats:sub>O to N<jats:sub>2</jats:sub> was significantly retarded by the presence of nitrate. The length of the lag period increased as the initial nitrate concentration was increased. Key words: Dissimilatory nitrate reduction, denitrification, nitrous oxide, nitric oxide </jats:p> |
|---|---|
| Umfang: | 21-29 |
| ISSN: |
0008-4271
1918-1841 |
| DOI: | 10.4141/cjss84-003 |