Insight into the Inhibition of the Poisonous Sulfide Production from Sulfate-Reducing Microbiota in Mariculture Habitat

作     者：ZHAO Xuning ZHANG Zhiming ZHAO Yangguo MUPINDU Progress ZHAO Xuning;ZHANG Zhiming;ZHAO Yangguo;MUPINDU Progress

作者机构：Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering(MEGE)College of Environmental Science and EngineeringOcean University of ChinaQingdao 266100China Key Laboratory of Marine Environmental Science and Ecology(Ocean University of China)Ministry of EducationQingdao 266100China 

出 版 物：《Journal of Ocean University of China》 (中国海洋大学学报（英文版）)

年 卷 期：2024年第23卷第2期

页      面：447-454页

核心收录：

学科分类：090801[农学-水产养殖] 0908[农学-水产] 0707[理学-海洋科学] 09[农学] 

基　　金：supported by the National Natural Science Foundation of China(No.41977315) the Fundamental Research Funds for the Central Universities of China(No.201964004). 

主　　题：sulfate-reducing microbiota sulfide nitrate Desulfovibrio mariculture 

摘      要：The production of toxic sulfides is a common environmental problem in mariculture.Therefore,the effective inhibition of sulfidogens is the key to prevent sulfides production.In this study,the possibility and mechanism of nitrate(NO_(3)^(−))inhibiting the activity of the sulfate-reducing microbiota(SRM)from mariculture sediments was investigated.The results showed that 1,3,and 5 mmol L^(−1)NO_(3)^(−)continuously inhibited sulfide production for 1-3 d.As NO_(3)^(−) dosage increased to 7 mmol L^(−1),the duration of inhibition increased to 6 days.Denitrifying product NO_(2)^(−)heavily inhibited the activity of dissimilar sulfate reductase gene(dsrB)by 3 orders,which was the main reason that the sulfate-reducing activity was inhibited.The SRM structure changed significantly with the dosage of NO_(3)^(−),while the abundance of sulfidogens Desulfovibrio species increased due to their capability of detoxifying nitrite through nitrite reductase.Hence,sulfidogens Desulfovibrio species are more adaptable to a high nitrate/nitrite environment,and the traditional control strategies by dosing nitrate/nitrite should be paid more attention to.The findings will serve as helpful guidelines for sulfate-reducing microbiota in the habitat of mariculture to reduce their generation of poisonous sulfide.