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Febria FA, Sari R, Walpajri F, Putra A. Exploration and Molecular Identification of Proteolytic Bacteria as Probiotic Candidates from Shrimp Ponds in West Sumatra, Indonesia. Pak J Biol Sci 2024; 27:356-364. [PMID: 39206469 DOI: 10.3923/pjbs.2024.356.364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
<b>Background and Objective:</b> The existence of intensive shrimp aquaculture faces serious challenges in the form of a decrease in pond water quality due to overfeeding. Efforts are needed to improve pond water quality by utilizing proteolytic bacterial isolates to break down suspended or accumulated feed on the pond bottom. The research aims to find proteolytic bacterial isolates from pond sediments and the digestive tract of shrimp (<i>Litopenaeus vannamei</i>). <b>Materials and Methods:</b> The materials needed are pond sediment samples, shrimp digestive tract, seawater complete agar (SWCA) medium and skim milk agar medium (SMA). The study used survey methods to determine sampling locations and continued with experimental methods in the laboratory. Nine isolates were obtained from pond sediments and two bacterial isolates were from the shrimp digestive tract. <b>Results:</b> The proteolytic potency test showed that two isolates from pond sediments and one isolate from the digestive tract of shrimp were positive for proteolytic. The largest proteolytic index value reached 6.357. Molecular identification by analyzing the <i>16S rRNA</i> gene sequence shows that PC23 isolate is closely related to the bacterium <i>Exiguobacterium indicum </i>strain KR6 with percent identity 99.44-99.58% and PU32 isolate with <i>Bacillus cereus</i> strain 125 with percent identity 100%. <b>Conclusion:</b> The bacteria obtained can be used as probiotic candidates for the future are <i>Exiguobacterium indicum</i> strain KR6 and <i>Bacillus cereus</i> strain 125.
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Miyasaka H, Koga A, Maki TA. Recent progress in the use of purple non-sulfur bacteria as probiotics in aquaculture. World J Microbiol Biotechnol 2023; 39:145. [PMID: 37014486 DOI: 10.1007/s11274-023-03592-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 03/23/2023] [Indexed: 04/05/2023]
Abstract
The use of probiotics in aquaculture is widely recognized as an ecological and cost-effective approach to raising healthy, pathogen-tolerant aquatic animals, including fish and shrimp. In particular for shrimp, probiotics are viewed as a promising countermeasure to the recent severe damage to the shrimp industry by bacterial and viral pathogens. Purple non-sulfur bacteria (PNSB) are Gram-negative, non-pathogenic bacteria with wide application potential in agriculture, wastewater treatment, and bioenergy/biomaterials production. In aquaculture, lactic bacteria and Bacillus are the major probiotic bacteria used, but PNSB, like Rhodopseudomonas and Rhodobacter, are also used. In this review, we summarize the previous work on the use of PNSB in aquaculture, overview the previous studies on the stimulation of innate immunity of shrimp by various probiotic microorganisms, and also share our results in the probiotic performance of Rhodovulum sulfidophilum KKMI01, a marine PNSB, which showed a superior effect in promotion of growth and stimulation of immunity in shrimp at a quite low concentration of 1 × 103 cfu (colony forming unit)/ml in rearing water.
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Affiliation(s)
- Hitoshi Miyasaka
- Department of Applied Life Science, Sojo University, 4-22-1 Ikeda, Nishiku, Kumamoto, 860-0082, Japan.
- Ciamo Co. Ltd., G-2F Sojo University, 4-22-1 Ikeda, Nishiku, Kumamoto, 860-0082, Japan.
- Matsumoto Institute of Microorganisms Co. Ltd, 2904 Niimura, Matsumoto, Nagano, 390-1241, Japan.
| | - Aoi Koga
- Department of Applied Life Science, Sojo University, 4-22-1 Ikeda, Nishiku, Kumamoto, 860-0082, Japan
- Ciamo Co. Ltd., G-2F Sojo University, 4-22-1 Ikeda, Nishiku, Kumamoto, 860-0082, Japan
- Matsumoto Institute of Microorganisms Co. Ltd, 2904 Niimura, Matsumoto, Nagano, 390-1241, Japan
| | - Taka-Aki Maki
- Department of Applied Life Science, Sojo University, 4-22-1 Ikeda, Nishiku, Kumamoto, 860-0082, Japan
- Ciamo Co. Ltd., G-2F Sojo University, 4-22-1 Ikeda, Nishiku, Kumamoto, 860-0082, Japan
- Matsumoto Institute of Microorganisms Co. Ltd, 2904 Niimura, Matsumoto, Nagano, 390-1241, Japan
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Dong D, Sun H, Qi Z, Liu X. Improving microbial bioremediation efficiency of intensive aquacultural wastewater based on bacterial pollutant metabolism kinetics analysis. CHEMOSPHERE 2021; 265:129151. [PMID: 33302206 DOI: 10.1016/j.chemosphere.2020.129151] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 10/28/2020] [Accepted: 11/27/2020] [Indexed: 06/12/2023]
Abstract
How to effectively bioremediate aquacultural wastewater using microbes is an urgent issue for the application of aquaculture beneficial microorganisms. Purple non-sulfur bacteria (PNSB) are beneficial in preventing related pollution in aquaculture applications. An autochthonous PNSB Rhodobacter sphaeroides was employed in this study to explore an effective bioremediation strategy of aquacultural wastewater. The test bacterium showed high performance in the removal of ammonium (97.50% ± 0.78% of 42 mg L-1 NH4+-N) and phosphate (93.24% ± 0.71% of 50 mg L-1 PO43--P) in the synthetic wastewater, which are the two crucial indicators of the aquacultural wastewater bioremediation. The study also unveiled that the imbalanced ratio of nutrients in water was the principal reason for limiting the efficient bioremediation of shrimp-culture wastewater. Therefore, an effective microbial bioremediation strategy was proposed by comprehensively considering bacterial pollutant metabolism kinetics constants such as specific consumption yields of chemical oxygen demand (COD)/phosphorous and nitrogen/phosphorous. Finally, COD, total nitrogen (TN), total phosphorus (TP), and ammonium (NH4+-N) in the wastewater were examined, and the results showed that they all decreased to the acceptable values. In conclusion, this study suggested a novel method for improved bioremediation efficiency of aquacultural wastewater, and the findings revealed that this strategy is promising due to its characteristics to be used in various aquaculture wastewater types.
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Affiliation(s)
- Die Dong
- State Key Laboratory of Bio-based Material and Green Papermaking (LBMP), Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, PR China
| | - Haoyu Sun
- State Key Laboratory of Bio-based Material and Green Papermaking (LBMP), Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, PR China; Key Laboratory of Shandong Microbial Engineering, College of Bioengineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, PR China
| | - Zhengliang Qi
- Key Laboratory of Shandong Microbial Engineering, College of Bioengineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, PR China.
| | - Xinli Liu
- State Key Laboratory of Bio-based Material and Green Papermaking (LBMP), Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, PR China; Key Laboratory of Shandong Microbial Engineering, College of Bioengineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, PR China
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George DM, Vincent AS, Mackey HR. An overview of anoxygenic phototrophic bacteria and their applications in environmental biotechnology for sustainable Resource recovery. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2020; 28:e00563. [PMID: 33304839 PMCID: PMC7714679 DOI: 10.1016/j.btre.2020.e00563] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 10/12/2020] [Accepted: 11/18/2020] [Indexed: 12/14/2022]
Abstract
Anoxygenic phototrophic bacteria (APB) are a phylogenetically diverse group of organisms that can harness solar energy for their growth and metabolism. These bacteria vary broadly in terms of their metabolism as well as the composition of their photosynthetic apparatus. Unlike oxygenic phototrophic bacteria such as algae and cyanobacteria, APB can use both organic and inorganic electron donors for light-dependent fixation of carbon dioxide without generating oxygen. Their versatile metabolism, ability to adapt in extreme conditions, low maintenance cost and high biomass yield make APB ideal for wastewater treatment, resource recovery and in the production of high value substances. This review highlights the advantages of APB over algae and cyanobacteria, and their applications in photo-bioelectrochemical systems, production of poly-β-hydroxyalkanoates, single-cell protein, biofertilizers and pigments. The ecology of ABP, their distinguishing factors, various physiochemical parameters governing the production of high-value substances and future directions of APB utilization are also discussed.
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Key Words
- ALA, 5-Aminolevulinic acid
- APB, Anoxygenic phototrophic bacteria
- Anoxygenic phototrophic bacteria (APB)
- BChl, Bacteriochlorophyll
- BES, Bioelectrochemical systems
- BPV, Biophotovoltaic
- BPh, Bacteriopheophytin
- Bacteriochlorophyll (BChl)
- Chl, Chlorophyll
- CoQ10, Coenzyme Q10
- DET, Direct electron transfer
- DNA, Deoxyribonucleic acid
- DO, Dissolved oxygen
- DXP, 1 deoxy-d-xylulose 5-phosphate
- FPP, Farnesyl pyrophosphate
- Fe-S, Iron-Sulfur
- GNSB, Green non sulfur bacteria
- GSB, Green sulfur bacteria
- IPP, Isopentenyl pyrophosphate isomerase
- LED, light emitting diode
- LH2, light-harvesting component II
- MFC, Microbial fuel cell
- MVA, Mevalonate
- PH3B, Poly-3-hydroxybutyrate
- PHA, Poly-β-hydroxyalkanoates
- PHB, Poly-β-hydroxybutyrate
- PNSB, Purple non sulfur bacteria
- PPB, Purple phototrophic bacteria
- PSB, Purple sulfur bacteria
- Pheo-Q, Pheophytin-Quinone
- Photo-BES, Photosynthetic bioelectrochemical systems
- Photo-MFC, Photo microbial fuel cell
- Poly-β-hydroxyalkanoates (PHA)
- Purple phototrophic bacteria (PPB)
- Resource recovery
- RuBisCO, Ribulose-1,5-biphosphate carboxylase/oxygenase
- SCP, Single-cell protein
- SOB, Sulfide oxidizing bacteria
- SRB, Sulfate reducing bacteria
- Single-cell proteins (SCP)
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Affiliation(s)
- Drishya M. George
- College of Health and Life Sciences, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - Annette S. Vincent
- College of Health and Life Sciences, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
- Biological Sciences Program, Carnegie Mellon University in Qatar, Qatar
| | - Hamish R. Mackey
- College of Health and Life Sciences, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
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Photosynthetic bacteria improved hydrogen yield of combined dark- and photo-fermentation. J Biotechnol 2019; 302:18-25. [PMID: 31202797 DOI: 10.1016/j.jbiotec.2019.06.298] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 06/03/2019] [Accepted: 06/13/2019] [Indexed: 01/17/2023]
Abstract
Integration of dark- and photo-fermentation is a promising strategy to enhance saline wastewater treatment efficiency and biohydrogen production. In this study, dark- and photo-fermentative bacterial consortium was respectively enriched and their communities were analyzed using polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE). Both consortia were mainly composed of hydrogen-producing strains. After the first-stage dark-fermentation, the following conditions were applied prior to the second-stage fermentation: fermentative broth pH regulation (the pH group), glucose addition (the glucose group), glucose addition and pH regulation (the glucose + pH group), photosynthetic bacteria addition (the photo group), and photosynthetic bacteria addition and pH regulation (the photo + pH group), respectively. Dark fermentative broth with no pretreatment was used as control (the control group). Then the second stage began. The results showed that pH restriction had more influence than substrate or products restriction on dark-fermentative hydrogen production. Addition of photo-fermentative bacteria after dark-fermentation increased the hydrogen yield (134%) and substrate utilization (67%). These findings indicated syntrophic interactions between dark- and photo-fermentative bacteria during the hydrogen production process.
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