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 

机构地区：[1]Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering(MEGE),College of Environmental Science and Engineering,Ocean University of China,Qingdao 266100,China [2]Key Laboratory of Marine Environmental Science and Ecology(Ocean University of China),Ministry of Education,Qingdao 266100,China

出　　处：《Journal of Ocean University of China》2024年第2期447-454,共8页中国海洋大学学报（英文版）

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).

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.

关 键 词：sulfate-reducing microbiota SULFIDE NITRATE DESULFOVIBRIO MARICULTURE 

分 类 号：S967[农业科学—水产养殖]