Screening of Three Chitinase-producing Strains, Optimization of Their Chitinase-producing Conditions and Application in the Hydrolysis of Shrimp Shells
Objective: This study aimed to screen and identify chitinase-producing strains and optimize the fermentation conditions of the target bacteria, which were eventually applied to the degradation fermentation of shrimp shells. Methods: The chitin degradation bacteria were screened on chitin hydrolysis...
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| Language: | zho |
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The editorial department of Science and Technology of Food Industry
2023-03-01
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| Series: | Shipin gongye ke-ji |
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| Online Access: | http://www.spgykj.com/cn/article/doi/10.13386/j.issn1002-0306.2022050078 |
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| author | Xiaoyang ZHANG Yiwen ZHANG Siyao ZHU Mian WANG Yongmei LÜ Xiaohong YU |
| author_facet | Xiaoyang ZHANG Yiwen ZHANG Siyao ZHU Mian WANG Yongmei LÜ Xiaohong YU |
| author_sort | Xiaoyang ZHANG |
| collection | DOAJ |
| description | Objective: This study aimed to screen and identify chitinase-producing strains and optimize the fermentation conditions of the target bacteria, which were eventually applied to the degradation fermentation of shrimp shells. Methods: The chitin degradation bacteria were screened on chitin hydrolysis zone taking marine mud from beach in Yancheng as samples, identified via bioinformatics technology, and analyzed in the form of phylogenetic tree. Fermentation conditions for the target strains were modified depending on the single-factor experiment. Results: Photobacterium sp. LYM-1, Vibrio sp. WM-1, and Shewanella sp. ZXY-1 were isolated and identified via 16S rDNA sequence analysis. The optimal fermentation conditions were determined as follows: For Photobacterium sp. LYM-1, chitin (10 g/L) as the carbon source, NH4Cl (2.0 g/L) as the nitrogen source, the inoculated quantified of 3%, initial medium pH6.5, and 32 ℃ for 1 d, in which the highest chitinase activity in the supernatant reached 15.37±0.55 U/mL, achieving 4.37 times higher than that before optimization. For Vibrio sp. WM-1, chitin (10 g/L) as the carbon source, NH4Cl (2.0 g/L) as the nitrogen source, the inoculated quantified of 3%, initial medium pH7.5, and 22 ℃ for 2 d, in which the highest chitinase activity reached 40.82±6.03 U/mL, achieving 1.60 times higher than that before optimization. For Shewanella sp. ZXY-1, chitin (10 g/L) as the carbon source, (NH4)2SO4 (2.0 g/L) as the nitrogen source, the inoculated quantified of 3%, initial medium pH6.5, and 22 ℃ for 1 d, which contributed the highest chitinase activity to reaching 25.64±3.29 U/mL，achieving 2.47 times higher than that before optimization. All three strains in this study could realize chitinase production under optimized conditions using shrimp shell powder as the sole substrate. The chitinase activities of Photobacterium sp. LYM-1, Vibrio sp. WM-1, and Shewanella sp. ZXY-1 on shrimp shell powders were 10.25±0.95, 32.16±2.25 and 21.81±4.27 U/mL, respectively, which was lower than those on chitin powder. Conclusion: Three chitinase-producing strains were successfully screened from saline-alkali soil, of which the enzyme activity was elevated after optimization. All of them could produce chitinase with the shrimp shell utilized as the substrate, serving as potential strains for chitinase production from the fermentation of shrimp shell. |
| first_indexed | 2024-04-10T06:35:49Z |
| format | Article |
| id | doaj.art-fea8da1ca90a45859244c43ff8dcb81c |
| institution | Directory Open Access Journal |
| issn | 1002-0306 |
| language | zho |
| last_indexed | 2024-04-10T06:35:49Z |
| publishDate | 2023-03-01 |
| publisher | The editorial department of Science and Technology of Food Industry |
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| series | Shipin gongye ke-ji |
| spelling | doaj.art-fea8da1ca90a45859244c43ff8dcb81c2023-03-01T01:21:35ZzhoThe editorial department of Science and Technology of Food IndustryShipin gongye ke-ji1002-03062023-03-014459810610.13386/j.issn1002-0306.20220500782022050078-5Screening of Three Chitinase-producing Strains, Optimization of Their Chitinase-producing Conditions and Application in the Hydrolysis of Shrimp ShellsXiaoyang ZHANG0Yiwen ZHANG1Siyao ZHU2Mian WANG3Yongmei LÜ4Xiaohong YU5College of Marine and Bioengineering, Yancheng Institute of Technology, Yancheng 224051, ChinaCollege of Marine and Bioengineering, Yancheng Institute of Technology, Yancheng 224051, ChinaCollege of Marine and Bioengineering, Yancheng Institute of Technology, Yancheng 224051, ChinaCollege of Marine and Bioengineering, Yancheng Institute of Technology, Yancheng 224051, ChinaCollege of Marine and Bioengineering, Yancheng Institute of Technology, Yancheng 224051, ChinaCollege of Marine and Bioengineering, Yancheng Institute of Technology, Yancheng 224051, ChinaObjective: This study aimed to screen and identify chitinase-producing strains and optimize the fermentation conditions of the target bacteria, which were eventually applied to the degradation fermentation of shrimp shells. Methods: The chitin degradation bacteria were screened on chitin hydrolysis zone taking marine mud from beach in Yancheng as samples, identified via bioinformatics technology, and analyzed in the form of phylogenetic tree. Fermentation conditions for the target strains were modified depending on the single-factor experiment. Results: Photobacterium sp. LYM-1, Vibrio sp. WM-1, and Shewanella sp. ZXY-1 were isolated and identified via 16S rDNA sequence analysis. The optimal fermentation conditions were determined as follows: For Photobacterium sp. LYM-1, chitin (10 g/L) as the carbon source, NH4Cl (2.0 g/L) as the nitrogen source, the inoculated quantified of 3%, initial medium pH6.5, and 32 ℃ for 1 d, in which the highest chitinase activity in the supernatant reached 15.37±0.55 U/mL, achieving 4.37 times higher than that before optimization. For Vibrio sp. WM-1, chitin (10 g/L) as the carbon source, NH4Cl (2.0 g/L) as the nitrogen source, the inoculated quantified of 3%, initial medium pH7.5, and 22 ℃ for 2 d, in which the highest chitinase activity reached 40.82±6.03 U/mL, achieving 1.60 times higher than that before optimization. For Shewanella sp. ZXY-1, chitin (10 g/L) as the carbon source, (NH4)2SO4 (2.0 g/L) as the nitrogen source, the inoculated quantified of 3%, initial medium pH6.5, and 22 ℃ for 1 d, which contributed the highest chitinase activity to reaching 25.64±3.29 U/mL，achieving 2.47 times higher than that before optimization. All three strains in this study could realize chitinase production under optimized conditions using shrimp shell powder as the sole substrate. The chitinase activities of Photobacterium sp. LYM-1, Vibrio sp. WM-1, and Shewanella sp. ZXY-1 on shrimp shell powders were 10.25±0.95, 32.16±2.25 and 21.81±4.27 U/mL, respectively, which was lower than those on chitin powder. Conclusion: Three chitinase-producing strains were successfully screened from saline-alkali soil, of which the enzyme activity was elevated after optimization. All of them could produce chitinase with the shrimp shell utilized as the substrate, serving as potential strains for chitinase production from the fermentation of shrimp shell.http://www.spgykj.com/cn/article/doi/10.13386/j.issn1002-0306.2022050078chitinase-producing strainoptimization of enzyme-producingshrimp and crab shellssingle factor experiment |
| spellingShingle | Xiaoyang ZHANG Yiwen ZHANG Siyao ZHU Mian WANG Yongmei LÜ Xiaohong YU Screening of Three Chitinase-producing Strains, Optimization of Their Chitinase-producing Conditions and Application in the Hydrolysis of Shrimp Shells Shipin gongye ke-ji chitinase-producing strain optimization of enzyme-producing shrimp and crab shells single factor experiment |
| title | Screening of Three Chitinase-producing Strains, Optimization of Their Chitinase-producing Conditions and Application in the Hydrolysis of Shrimp Shells |
| title_full | Screening of Three Chitinase-producing Strains, Optimization of Their Chitinase-producing Conditions and Application in the Hydrolysis of Shrimp Shells |
| title_fullStr | Screening of Three Chitinase-producing Strains, Optimization of Their Chitinase-producing Conditions and Application in the Hydrolysis of Shrimp Shells |
| title_full_unstemmed | Screening of Three Chitinase-producing Strains, Optimization of Their Chitinase-producing Conditions and Application in the Hydrolysis of Shrimp Shells |
| title_short | Screening of Three Chitinase-producing Strains, Optimization of Their Chitinase-producing Conditions and Application in the Hydrolysis of Shrimp Shells |
| title_sort | screening of three chitinase producing strains optimization of their chitinase producing conditions and application in the hydrolysis of shrimp shells |
| topic | chitinase-producing strain optimization of enzyme-producing shrimp and crab shells single factor experiment |
| url | http://www.spgykj.com/cn/article/doi/10.13386/j.issn1002-0306.2022050078 |
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