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Evidence for the direct oxidation of organic nitrogen to N2 gas in the Arabian Sea
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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. doi:10.1038/ismej.2012.18 ISSN 1751-7362.
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Official URL: http://dx.doi.org/10.1038/ismej.2012.18
Abstract
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 | ||||
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Subjects: | Q Science > Q Science (General) | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||
Journal or Publication Title: | ISME Journal | ||||
Publisher: | Nature Publishing Group | ||||
ISSN: | 1751-7362 | ||||
Official Date: | September 2012 | ||||
Dates: |
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Volume: | Vol.6 | ||||
Number: | No.9 | ||||
Page Range: | pp. 1798-1800 | ||||
DOI: | 10.1038/ismej.2012.18 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Description: | Short Communication |
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