携带nosZ Ⅱ基因的非反硝化菌缓解土壤N2O排放的研究进展
An Overview of Non-Denitrifying Bacteria Carrying nosZ Ⅱ Gene on Mitigating Soil N2O Emissions
贾晓雨 1张欣 1孙健聪 1刘帅 1巩晓梦 1胡坚挺 1夏宗伟1
作者信息
- 1. 临沂大学 资源环境学院 山东省水土保持与环境保育重点实验室,山东临沂 276000
- 折叠
摘要
氧化亚氮是主要的温室气体之一,农田土壤是重要的人为N2O排放源,探索合理的农田N2O减排措施是亟待解决的重大课题.反硝化过程中N2O还原为N2 是目前已知的唯一的生物途径的N2O汇,利用能够还原N2O的微生物菌群是减缓农田土壤N2O排放的潜在途径,对催化N2O还原功能基因nosZ的研究表明N2O还原菌存在两种基因型.本文主要综述了两种类型的N2O还原菌具有不同的系统发育特征、生理学特性,以及N2O还原的酶促动力学,相比较而言,具有nosZ Ⅱ型的N2O还原菌表现出更强的环境适应性,因此是有竞争力的土壤N2O汇的潜在菌群.
Abstract
Nitrous oxide(N2O)is one of the main greenhouse gases,and cropland is an important source of anthropogenic N2O emissions.Exploring reasonable measures to mitigate N2O emissions in cropland is a major issue that urgently needs to be addressed.The reduction of N2O to N2 during denitrification is currently the only known biological pathway of N2O sink.The use of microbial communities capable of reducing N2O is a potential pathway to mitigate N2O emissions from cropland.Research on nosZ gene catalyzing N2O reduction has shown that there are two genotypes of N2O reducing bacteria.This paper mainly reviews the different phylogenetic and physiological characteristics of two types of N2O reducing bacteria,as well as the enzymatic kinetics of N2O reduction.In comparison,N2O reducing bacteria carrying nosZ Ⅱ exhibit stronger environmental adaptability,making them a competitive potential microbial community for cropland N2O sink.
关键词
土壤N2O排放/农田N2O减排措施/N2O还原菌/nosZ/Ⅰ/nosZ/ⅡKey words
N2O emissions from soil/measures on mitigating N2O emissions from cropland/N2O reducing bacteria/nosZ Ⅰ/nosZ Ⅱ引用本文复制引用
基金项目
临沂大学2022年大学生创新创业训练计划项目(X202210452101)
出版年
2024
NETL
NSTL
万方数据