Dissimilatory nitrate reduction to ammonium has a competitive advantage over denitrification under nitrate-limited conditions

IF 8.6 1区 环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Yixiao Liao, Tengxia He, Cerong Wang, Chunxia Zheng, Manman Zhang
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引用次数: 0

Abstract

Dissimilatory nitrate reduction to ammonium (DNRA) is important for nitrogen retention in ecosystems and is in competition with denitrification. However, denitrification tends to dominate. A high organic carbon content and limited nitrate are the key conditions for DNRA to outcompete denitrification, but the mechanisms for controlling the nitrate fate are not well understood. This review systematically summarizes the processes of and correlation between DNRA and denitrification, with a focus on outlining the characteristics of the active enzymes, including the enzyme structure, substrate affinity, and electron transfer. The competitive advantage of DNRA for electron acceptors are highlighted and discussed from enzymatic and kinetic perspectives. The high electron acquisition of DNRA causes it to dominate nitrate removal under nitrate limitation. Finally, strategies for promoting environmental nitrogen retention through DNRA are proposed, and possible directions for future research are suggested. This review aims to improve understanding of the competitive mechanisms of DNRA and denitrification and to promote the application and development of DNRA as a sustainable nitrogen retention strategy.

在硝酸盐限制条件下,异化硝酸还原成铵比反硝化具有竞争优势
异化硝态氮还原为铵态氮(DNRA)对生态系统中的氮保持具有重要意义,并与反硝化作用相互竞争。然而,反硝化往往占主导地位。高有机碳含量和有限的硝酸盐含量是DNRA战胜反硝化的关键条件,但控制硝酸盐命运的机制尚不清楚。本文系统综述了DNRA与反硝化反应的过程及其相互关系,重点介绍了DNRA与反硝化反应的酶的结构、底物亲和力和电子转移等特征。强调了DNRA作为电子受体的竞争优势,并从酶和动力学的角度进行了讨论。DNRA的高电子获取使其在硝酸盐限制下主导硝酸盐的去除。最后,提出了通过DNRA促进环境氮潴留的策略,并提出了未来可能的研究方向。本文旨在进一步了解DNRA与反硝化作用的竞争机制,促进DNRA作为一种可持续的氮保留策略的应用和开发。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Reviews in Environmental Science and Bio/Technology
Reviews in Environmental Science and Bio/Technology Environmental Science-Waste Management and Disposal
CiteScore
25.00
自引率
1.40%
发文量
37
审稿时长
4.5 months
期刊介绍: Reviews in Environmental Science and Bio/Technology is a publication that offers easily comprehensible, reliable, and well-rounded perspectives and evaluations in the realm of environmental science and (bio)technology. It disseminates the most recent progressions and timely compilations of groundbreaking scientific discoveries, technological advancements, practical applications, policy developments, and societal concerns encompassing all facets of environmental science and (bio)technology. Furthermore, it tackles broader aspects beyond the natural sciences, incorporating subjects such as education, funding, policy-making, intellectual property, and societal influence.
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