Cadaverine and putrescine exposure influence carbon and nitrogen cycling genes in water and sediment of the Yellow River

被引：0

作者：

Su, Wanghong ^{[1
]}

Yu, Qiaoling ^{[1
]}

Yang, Jiawei ^{[1
]}

Han, Qian ^{[1
]}

Wang, Sijie ^{[1
]}

Heděnec, Petr ^{[2
]}

Wang, Xiaochen ^{[1
]}

Wan-Yan, Ruijun ^{[1
]}

Li, Huan ^{[1
,3
]}

机构：

[1] School of Public Health, Lanzhou University, Lanzhou,730000, China

[2] Institute for Tropical Biodiversity and Sustainable Development, University Malaysia Terengganu, Terengganu, Kuala Nerus,21030, Malaysia

[3] State Key Laboratory of Grassland Agro-ecosystems, Center for Grassland Microbiome, College of pastoral agriculture science and technology, Lanzhou University, Lanzhou,730000, China

来源：

Journal of Environmental Sciences (China) | 2024年 / 142卷

基金：

中国国家自然科学基金;

关键词：

Biogeochemistry - Carbon - Nitrogen - River pollution - Sediments;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The response patterns of microbial functional genes involved in biogeochemical cycles to cadaver decay is a central topic of recent environmental sciences. However, the response mechanisms and pathways of the functional genes associated with the carbon (C) and nitrogen (N) cycling to cadaveric substances such as cadaverine and putrescine remain unclear. This study explored the variation of functional genes associated with C fixation, C degradation and N cycling and their influencing factors under cadaverine, putrescine and mixed treatments. Our results showed only putrescine significantly increased the alpha diversity of C fixation genes, while reducing the alpha diversity of N cycling genes in sediment. For the C cycling, the mixed treatment significantly decreased the total abundance of reductive acetyl-CoA pathway genes (i.e., acsB and acsE) and lig gene linked to lignin degradation in water, while only significantly increasing the hydroxypropionate-hydroxybutylate cycle (i.e., accA) gene abundance in sediment. For the N cycling, mixed treatment significantly decreased the abundance of the nitrification (i.e., amoB), denitrification (i.e., nirS3) genes in water and the assimilation pathway gene (i.e., gdhA) in sediment. Environmental factors (i.e., total carbon and total nitrogen) were all negatively associated with the genes of C and N cycling. Therefore, cadaverine and putrescine exposure may inhibit the pathway in C fixation and N cycling, while promoting C degradation. These findings can offer some new insight for the management of amine pollution caused by animal cadavers. © 2023

引用

页码：236 / 247