Evidence for the direct oxidation of organic nitrogen to N2 gas in the Arabian Sea
Trimmer, Mark and Purdy, Kevin J.. (2012) Evidence for the direct oxidation of organic nitrogen to N2 gas in the Arabian Sea. ISME Journal, Vol.6 (No.9). pp. 1798-1800. ISSN 1751-7362Full text not available from this repository.
Official URL: http://dx.doi.org/10.1038/ismej.2012.18
We performed a suite of 15N incubations ( 15NO 2 -, 15NO 3 - and 15NH 4 +) with and without the organic-nitrogen (N) compound allylthiourea (ATU), in the suboxic waters of the Arabian Sea. Production of 29N 2 in control (-ATU) incubations with either 15NH 4 ++ 14NO 2 -, or their analogues, 15NO 2 -+ 14NH 4 +, though small, confirmed the presence of anammox. In contrast, when we added ATU, along with 15NO 2 - and 14NH 4 +, there was a much greater production of 29N 2, with 92% of the 15N-label being recovered as 29N 2 on average. Such stimulated production of 29N 2 could not be due to anammox, as the addition of ATU, along with 15NH 4 ++ 14NO 2 -, only produced 29N 2 equivalent to that in the controls. The ratios of 29N 2 to 30N 2 produced also precluded stimulation of denitrification. We present this as evidence for a hitherto uncharacterised metabolism potentially capable of oxidising organic-N (e.g. NH 2 groups) directly to N 2 gas at the expense of NO 2 -.
|Item Type:||Journal Article|
|Subjects:||Q Science > Q Science (General)|
|Divisions:||Faculty of Science > Life Sciences (2010- )|
|Journal or Publication Title:||ISME Journal|
|Publisher:||Nature Publishing Group|
|Page Range:||pp. 1798-1800|
|Access rights to Published version:||Restricted or Subscription Access|
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