AI Article Synopsis
- Pseudomonas sp. ZHL02 utilizes a specific nitrogen removal pathway involving ammonia and various nitrogen compounds to study how it performs heterotrophic nitrification-aerobic denitrification (HNAD).
- The research found that ZHL02 primarily removes ammonia nitrogen through assimilation, with varying effects on electron transport and nitrogen removal based on different carbon sources used, such as sodium succinate and sodium citrate.
- Transcriptome analysis revealed the absence of certain key ammonia-oxidizing genes in ZHL02, suggesting that unknown genes might play a role in its nitrogen removal process, indicating the need for further investigation into the relationship between carbon and nitrogen metabolism in HNAD pathways.
Article Abstract
Pseudomonas sp. ZHL02, removing nitrogen via ammonia nitrogen (NH) → hydroxylamine (HNOH) → nitrite (NO) → nitrate (NO) → NO → nitric oxide (NO) → nitrous oxide (NO) pathway was employed for getting in-depth information on the heterotrophic nitrification-aerobic denitrification (HNAD) pathway from carbon oxidation, nitrogen conversion, electron transport process, enzyme activity, as well as gene expression while sodium succinate, sodium citrate, and sodium acetate were utilized as the carbon sources. The nitrogen balance analysis results demonstrated that ZHL02 mainly removed NH-N through assimilation. The carbon source metabolism resulted in the discrepancies in electron transport chain and nitrogen removal between different HNAD bacteria. Moreover, the prokaryotic strand-specific transcriptome method showed that, amo and hao were absent in ZHL02, and unknown genes may be involved in ZHL02 during the HNAD process. As a fascinating process for removing nitrogen, the HNAD process is still puzzling, and the relationship between carbon metabolism and nitrogen metabolism among different HNAD pathways should be studied further.
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| http://dx.doi.org/10.1016/j.chemosphere.2024.142525 | DOI Listing |
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