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

作　　者：Wanghong Su Qiaoling Yu Jiawei Yang Qian Han Sijie Wang Petr Hedenec Xiaochen Wang Ruijun Wan-Yan Huan Li 

机构地区：[1]School of Public Health,Lanzhou University,Lanzhou 730000,China 2 Institute for Tropical Biodiversity and Sustainable Development,University Malaysia Terengganu,21030,Kuala Nerus,Terengganu,Malaysia [2]State Key Laboratory of Grassland Agro-ecosystems,Center for Grassland Microbiome,College of pastoral [3]agriculture science and technology,Lanzhou University,Lanzhou 730000,China

出　　处：《Journal of Environmental Sciences》2024年第8期236-247,共12页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.42007026);the Medical Innovation and Development Project of Lanzhou University(No.lzuyxcx-2022-172)。

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.

关 键 词：Carbon cycling Nitrogen cycling CADAVERINE PUTRESCINE Pollution management 

分 类 号：P593[天文地球—地球化学]