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Cui L, Zhu B, Zhang X, Chan Z, Zhao C, Zeng R, Yang S, Chen S. Effects of Supplement of Marichromatium gracile YL28 on Water Quality and Microbial Structures in Shrimp Mariculture Ecosystems. Genes (Basel) 2020; 12:genes12010040. [PMID: 33396721 PMCID: PMC7823961 DOI: 10.3390/genes12010040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 12/23/2020] [Accepted: 12/24/2020] [Indexed: 01/22/2023] Open
Abstract
The elevated NH3-N and NO2-N pollution problems in mariculture have raised concerns because they pose threats to animal health and coastal and offshore environments. Supplement of Marichromatium gracile YL28 (YL28) into polluted shrimp rearing water and sediment significantly decreased ammonia and nitrite concentrations, showing that YL28 functioned as a novel safe marine probiotic in the shrimp culture industry. The diversity of aquatic bacteria in the shrimp mariculture ecosystems was studied by sequencing the V4 region of 16S rRNA genes, with respect to additions of YL28 at the low and high concentrations. It was revealed by 16S rRNA sequencing analysis that Proteobacteria, Planctomycete and Bacteroidetes dominated the community (>80% of operational taxonomic units (OTUs)). Up to 41.6% of the predominant bacterial members were placed in the classes Gammaproteobacteria (14%), Deltaproteobacteria (14%), Planctomycetacia (8%) and Alphaproteobacteria (5.6%) while 40% of OTUs belonged to unclassified ones or others, indicating that the considerable bacterial populations were novel in our shrimp mariculture. Bacterial communities were similar between YL28 supplements and control groups (without addition of YL28) revealed by the β-diversity using PCoA, demonstrating that the additions of YL28 did not disturb the microbiota in shrimp mariculture ecosystems. Instead, the addition of YL28 increased the relative abundance of ammonia-oxidizing and denitrifying bacteria. The quantitative PCR analysis further showed that key genes including nifH and amoA involved in nitrification and nitrate or nitrite reduction significantly increased with YL28 supplementation (p < 0.05). The supplement of YL28 decreased the relative abundance of potential pathogen Vibrio. Together, our studies showed that supplement of YL28 improved the water quality by increasing the relative abundance of ammonia-oxidizing and denitrifying bacteria while the microbial community structure persisted in shrimp mariculture ecosystems.
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Affiliation(s)
- Liang Cui
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen 361021, China; (L.C.); (B.Z.); (X.Z.); (C.Z.)
| | - Bitong Zhu
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen 361021, China; (L.C.); (B.Z.); (X.Z.); (C.Z.)
| | - Xiaobo Zhang
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen 361021, China; (L.C.); (B.Z.); (X.Z.); (C.Z.)
| | - Zhuhua Chan
- State Key Laboratory Breeding Base of Marine Genetic Resource, Third Institute of Oceanography, Ministry of Natural Resources, No. 178 Daxue Road, Xiamen 361005, China; (Z.C.); (R.Z.)
| | - Chungui Zhao
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen 361021, China; (L.C.); (B.Z.); (X.Z.); (C.Z.)
| | - Runying Zeng
- State Key Laboratory Breeding Base of Marine Genetic Resource, Third Institute of Oceanography, Ministry of Natural Resources, No. 178 Daxue Road, Xiamen 361005, China; (Z.C.); (R.Z.)
| | - Suping Yang
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen 361021, China; (L.C.); (B.Z.); (X.Z.); (C.Z.)
- Correspondence: (S.Y.); (S.C.)
| | - Shicheng Chen
- Department of Biomedical Diagnostic and Therapeutic Sciences, School of Health Sciences, Oakland University, Rochester, MI 48309, USA
- Correspondence: (S.Y.); (S.C.)
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Cui L, Zhu B, Zhang X, Zhao C, Wang S, Ke C, Yang S. Influences of organic nitrogen on the removal of inorganic nitrogen from complicated marine aquaculture water by Marichromatium gracile YL28. J Biosci Bioeng 2020; 130:179-186. [PMID: 32381439 DOI: 10.1016/j.jbiosc.2020.02.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 01/03/2020] [Accepted: 02/24/2020] [Indexed: 10/24/2022]
Abstract
The sediment-water interface is not only an important location for substrate conversion in a mariculture system, but also a major source of eutrophication. This study aimed to clarify the characteristics of inorganic nitrogen (ammonia, nitrite and nitrate) removal by Marichromatium gracile YL28 in the presence of both organic nitrogen and inorganic nitrogen. The results showed that, in the presence of peptone or urea, seaweed oligosaccharides (SOS) effectively enhanced the ammonia removal capacity of YL28 (6.42 mmol/L) and decreased the residual rate by 54.04% or 8.17%, respectively. With increasing peptone or urea concentrations, the removal of both ammonia and nitrate was gradually inhibited, and the residual rates of ammonia and nitrate reached 22.56-34.36% and 12.03-15.64% in the peptone system and 20.65-24.03% and 12.20-13.21% in the urea system, respectively. However, in the control group the residual rates of ammonia and nitrate reached 11.97% and 5.12%, respectively. In addition, the concentrations of peptone and urea did not affect nitrite removal, and YL28 displayed better cell growth and nitrogen removal activity in the presence of bait and SOS. Overall, the ability of YL28 to remove inorganic nitrogen was enhanced in the presence of organic nitrogen.
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Affiliation(s)
- Liang Cui
- Department of Bioengineering and Biotechnology, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, China
| | - Bitong Zhu
- Department of Bioengineering and Biotechnology, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, China
| | - Xiaobo Zhang
- Department of Bioengineering and Biotechnology, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, China
| | - Chungui Zhao
- Department of Bioengineering and Biotechnology, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, China
| | - Shasha Wang
- Department of Bioengineering and Biotechnology, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, China
| | - Changdong Ke
- Department of Bioengineering and Biotechnology, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, China
| | - Suping Yang
- Department of Bioengineering and Biotechnology, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, China.
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Zhu B, Chen S, Zhao C, Zhong W, Zeng R, Yang S. Effects of Marichromatium gracile YL28 on the nitrogen management in the aquaculture pond water. Bioresour Technol 2019; 292:121917. [PMID: 31408778 DOI: 10.1016/j.biortech.2019.121917] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 07/07/2019] [Revised: 07/22/2019] [Accepted: 07/25/2019] [Indexed: 06/10/2023]
Abstract
Nitrogen pollution in aquaculture needs the efficient and cost-effective in-situ technology. This study aims to apply Marichromatium gracile YL28 to in-situ bioremediation and test its ability to maintain the nitrogen balance in aquaculture. In laboratory aquaculture system, approximately 99.96% of nitrite (1 mg/L) was removed within 7 d through denitrification coupled with assimilatory nitrate reduction. Ammonium (3.5 mg/L) of 95.6% was directly assimilated by YL28 within 7 d. Moreover, in zero exchange water from shrimp (Penaeus vannamei) aquaculture field trials (20 days), YL28 significantly reduced the ammonium accumulation (0.6 mg/L) and 99.3% of nitrite (1.25 mg/L). Toxicological studies with the Institute of Cancer Research (ICR) mice and Oryzias melastigma indicated that M. gracile YL28 can be safely applied in aquatic ecosystems. All results demonstrate that strain YL28 has high promise for future applications of removing inorganic nitrogen and maintaining the nitrogen balance from in-situ aquaculture.
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Affiliation(s)
- Bitong Zhu
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen 361021, China
| | - Shicheng Chen
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI 48863, USA
| | - Chungui Zhao
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen 361021, China
| | - Weihua Zhong
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen 361021, China
| | - Runying Zeng
- State Key Laboratory Breeding Base of Marine Genetic Resource, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, Fujian 361005, China
| | - Suping Yang
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen 361021, China.
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