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Dou L, Zhang M, Pan L, Liu L, Su Z. Sulfide removal characteristics, pathways and potential application of a novel chemolithotrophic sulfide-oxidizing strain, Marinobacter sp. SDSWS8. Environ Res 2022; 212:113176. [PMID: 35364039 DOI: 10.1016/j.envres.2022.113176] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 03/14/2022] [Accepted: 03/22/2022] [Indexed: 05/27/2023]
Abstract
Sulfide generally exists in wastewater, black and odor river, as well as aquaculture water, and give rise to adverse effect on ecological stability and biological safety, due to the toxicity, corrosivity and malodor of sulfide. In the present study, a chemolithotrophic sulfide-oxidizing bacteria (SOB) was isolated and identified as Marinobacter maroccanus strain SDSWS8. And it produced no hemolysin and was susceptible to most antibiotics. There were no accumulation of sulfide, sulfate and thiosulfate during the sulfide removal process. The optimum conditions of sulfide removal were temperature 15-40 °C, initial pH value 4.5-9.5, salinity 10-40‰, C/N ratio 0-20 and sulfide concentration 25-150 mg/L. The key genes of sulfide oxidation, Sox system (soxB, soxX, soxA, soxZ, soxY, soxD, soxC), dissimilatory sulfur oxidation (dsrA, aprA and sat) and sqr, were successfully amplified and expressed, indicating the three pathways coordinated to complete the sulfide oxidation. Besides, strain SDSWS8 had inhibitory effect on four pathogen Vibrio (V. harveyi, V. parahaemolyticus, V. anguillarum and V. splendidus). Furthermore, efficient removal of sulfide from real aquaculture water and sludge mixture could be accomplished by strain SDSWS8. This study may provide a promising candidate strain for sulfide-rich water treatment.
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Affiliation(s)
- Le Dou
- The Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, Qingdao, Shandong, 266003, China
| | - Mengyu Zhang
- The Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, Qingdao, Shandong, 266003, China
| | - Luqing Pan
- The Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, Qingdao, Shandong, 266003, China.
| | - Liping Liu
- The Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, Qingdao, Shandong, 266003, China
| | - Zhaopeng Su
- The Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, Qingdao, Shandong, 266003, China
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Raddadi N, Giacomucci L, Totaro G, Fava F. Marinobacter sp. from marine sediments produce highly stable surface-active agents for combatting marine oil spills. Microb Cell Fact 2017; 16:186. [PMID: 29096660 PMCID: PMC5668961 DOI: 10.1186/s12934-017-0797-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 10/24/2017] [Indexed: 12/21/2022] Open
Abstract
Background The application of chemical dispersants as a response to marine oil spills is raising concerns related to their potential toxicity also towards microbes involved in oil biodegradation. Hence, oil spills occurring under marine environments necessitate the application of biodispersants that are highly active, stable and effective under marine environment context. Biosurfactants from marine bacteria could be good candidates for the development of biodispersant formulations effective in marine environment. This study aimed at establishing a collection of marine bacteria able to produce surface-active compounds and evaluating the activity and stability of the produced compounds under conditions mimicking those found under marine environment context. Results A total of 43 different isolates were obtained from harbor sediments. Twenty-six of them produced mainly bioemulsifiers when glucose was used as carbon source and 16 were biosurfactant/bioemulsifiers producers after growth in the presence of soybean oil. Sequencing of 16S rRNA gene classified most isolates into the genus Marinobacter. The produced emulsions were shown to be stable up to 30 months monitoring period, in the presence of 300 g/l NaCl, at 4 °C and after high temperature treatment (120 °C for 20 min). The partially purified compounds obtained after growth on soybean oil-based media exhibited low toxicity towards V. fischeri and high capability to disperse crude oil on synthetic marine water. Conclusions To the best of our knowledge, stability characterization of bioemulsifiers/biosurfactants from the non-pathogenic marine bacterium Marinobacter has not been previously reported. The produced compounds were shown to have potential for different applications including the environmental sector. Indeed, their high stability in the presence of high salt concentration and low temperature, conditions characterizing the marine environment, the capability to disperse crude oil and the low ecotoxicity makes them interesting for the development of biodispersants to be used in combatting marine oil spills. Electronic supplementary material The online version of this article (10.1186/s12934-017-0797-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Noura Raddadi
- Department of Civil, Chemical, Environmental and Materials Engineering (DICAM), Alma Mater Studiorum-University of Bologna, Bologna, Italy.
| | - Lucia Giacomucci
- Department of Civil, Chemical, Environmental and Materials Engineering (DICAM), Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Grazia Totaro
- Department of Civil, Chemical, Environmental and Materials Engineering (DICAM), Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Fabio Fava
- Department of Civil, Chemical, Environmental and Materials Engineering (DICAM), Alma Mater Studiorum-University of Bologna, Bologna, Italy
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Lupette J, Lami R, Krasovec M, Grimsley N, Moreau H, Piganeau G, Sanchez-Ferandin S. Marinobacter Dominates the Bacterial Community of the Ostreococcus tauri Phycosphere in Culture. Front Microbiol 2016; 7:1414. [PMID: 27656176 PMCID: PMC5013054 DOI: 10.3389/fmicb.2016.01414] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Accepted: 08/26/2016] [Indexed: 11/13/2022] Open
Abstract
Microalgal–bacterial interactions are commonly found in marine environments and are well known in diatom cultures maintained in laboratory. These interactions also exert strong effects on bacterial and algal diversity in the oceans. Small green eukaryote algae of the class Mamiellophyceae (Chlorophyta) are ubiquitous and some species, such as Ostreococcus spp., are particularly important in Mediterranean coastal lagoons, and are observed as dominant species during phytoplankton blooms in open sea. Despite this, little is known about the diversity of bacteria that might facilitate or hinder O. tauri growth. We show, using rDNA 16S sequences, that the bacterial community found in O. tauri RCC4221 laboratory cultures is dominated by γ-proteobacteria from the Marinobacter genus, regardless of the growth phase of O. tauri RCC4221, the photoperiod used, or the nutrient conditions (limited in nitrogen or phosphorous) tested. Several strains of Marinobacter algicola were detected, all closely related to strains found in association with taxonomically distinct organisms, particularly with dinoflagellates and coccolithophorids. These sequences were more distantly related to M. adhaerens, M. aquaeoli and bacteria usually associated to euglenoids. This is the first time, to our knowledge, that distinct Marinobacter strains have been found to be associated with a green alga in culture.
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Affiliation(s)
- Josselin Lupette
- Sorbonne Universités, Université Pierre et Marie Curie Paris 06, UMR 7232 Biologie Intégrative des Organismes Marins, Observatoire OcéanologiqueBanyuls-sur-Mer, France; Centre National de la Recherche Scientifique, UMR 7232 Biologie Intégrative des Organismes Marins, Observatoire OcéanologiqueBanyuls-sur-Mer, France; CEA/CNRS/INRA/Université Grenoble Alpes, UMR 5168 Laboratoire Physiologie Cellulaire VégétaleGrenoble, France
| | - Raphaël Lami
- Sorbonne Universités, Université Pierre et Marie Curie Paris 06, USR 3579 Laboratoire de Biodiversité et Biotechnologies Microbiennes, Observatoire OcéanologiqueBanyuls-sur-Mer, France; Centre National de la Recherche Scientifique, USR 3579 Laboratoire de Biodiversité et Biotechnologies Microbiennes, Observatoire OcéanologiqueBanyuls-sur-Mer, France
| | - Marc Krasovec
- Sorbonne Universités, Université Pierre et Marie Curie Paris 06, UMR 7232 Biologie Intégrative des Organismes Marins, Observatoire OcéanologiqueBanyuls-sur-Mer, France; Centre National de la Recherche Scientifique, UMR 7232 Biologie Intégrative des Organismes Marins, Observatoire OcéanologiqueBanyuls-sur-Mer, France
| | - Nigel Grimsley
- Sorbonne Universités, Université Pierre et Marie Curie Paris 06, UMR 7232 Biologie Intégrative des Organismes Marins, Observatoire OcéanologiqueBanyuls-sur-Mer, France; Centre National de la Recherche Scientifique, UMR 7232 Biologie Intégrative des Organismes Marins, Observatoire OcéanologiqueBanyuls-sur-Mer, France
| | - Hervé Moreau
- Sorbonne Universités, Université Pierre et Marie Curie Paris 06, UMR 7232 Biologie Intégrative des Organismes Marins, Observatoire OcéanologiqueBanyuls-sur-Mer, France; Centre National de la Recherche Scientifique, UMR 7232 Biologie Intégrative des Organismes Marins, Observatoire OcéanologiqueBanyuls-sur-Mer, France
| | - Gwenaël Piganeau
- Sorbonne Universités, Université Pierre et Marie Curie Paris 06, UMR 7232 Biologie Intégrative des Organismes Marins, Observatoire OcéanologiqueBanyuls-sur-Mer, France; Centre National de la Recherche Scientifique, UMR 7232 Biologie Intégrative des Organismes Marins, Observatoire OcéanologiqueBanyuls-sur-Mer, France
| | - Sophie Sanchez-Ferandin
- Sorbonne Universités, Université Pierre et Marie Curie Paris 06, UMR 7232 Biologie Intégrative des Organismes Marins, Observatoire OcéanologiqueBanyuls-sur-Mer, France; Centre National de la Recherche Scientifique, UMR 7232 Biologie Intégrative des Organismes Marins, Observatoire OcéanologiqueBanyuls-sur-Mer, France
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