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Effect of static magnetic field on morphology and growth metabolism of Flavobacterium sp. m1-14.

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Title: Effect of static magnetic field on morphology and growth metabolism of Flavobacterium sp. m1-14.
Authors: Tang, Hengfang1,2 (AUTHOR), Wang, Peng1 (AUTHOR), Wang, Han1,2 (AUTHOR), Fang, Zhiwei1,2 (AUTHOR), Yang, Qiang1,2 (AUTHOR), Ni, Wenfeng1,2 (AUTHOR), Sun, Xiaowen1,2 (AUTHOR), Liu, Hui1 (AUTHOR), Wang, Li1 (AUTHOR), Zhao, Genhai1 (AUTHOR) zhgh327@126.com, Zheng, Zhiming1 (AUTHOR) zhengzhiming2014@163.com
Source: Bioprocess & Biosystems Engineering. Dec2019, Vol. 42 Issue 12, p1923-1933. 11p.
Subjects: Magnetic field effects, Magnetic flux density, Flavobacterium, Morphology, Metabolism, Plant growth promoting substances, Energy metabolism
Abstract: Increasing evidence shows that static magnetic fields (SMFs) can affect microbial growth metabolism, but the specific mechanism is still unclear. In this study, we have investigated the effect of moderate-strength SMFs on growth and vitamin K2 biosynthesis of Flavobacterium sp. m1-14. First, we designed a series of different moderate-strength magnetic field intensities (0, 50, 100, 150, 190 mT) and exposure times (0, 24, 48, 72, 120 h). With the optimization of static magnetic field intensity and exposure time, biomass and vitamin K2 production significantly increased compared to control. The maximum vitamin K2 concentration and biomass were achieved when exposed to 100 mT SMF for 48 h; compared with the control group, they increased by 71.3% and 86.8%, respectively. Interestingly, it was found that both the cell viability and morphology changed significantly after SMF treatment. Second, the adenosine triphosphate (ATP) and glucose-6-phosphate dehydrogenase (G6PDH) metabolism is more vigorous after exposed to 100 mT SMF. This change affects the cell energy metabolism and fermentation behavior, and may partially explain the changes in bacterial biomass and vitamin K2 production. The results show that moderate-strength SMFs may be a promising method to promote bacterial growth and secondary metabolite synthesis. [ABSTRACT FROM AUTHOR]
Copyright of Bioprocess & Biosystems Engineering is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Effect of static magnetic field on morphology and growth metabolism of Flavobacterium sp. m1-14.
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  Data: <searchLink fieldCode="JN" term="%22Bioprocess+%26+Biosystems+Engineering%22">Bioprocess & Biosystems Engineering</searchLink>. Dec2019, Vol. 42 Issue 12, p1923-1933. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Magnetic+field+effects%22">Magnetic field effects</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+flux+density%22">Magnetic flux density</searchLink><br /><searchLink fieldCode="DE" term="%22Flavobacterium%22">Flavobacterium</searchLink><br /><searchLink fieldCode="DE" term="%22Morphology%22">Morphology</searchLink><br /><searchLink fieldCode="DE" term="%22Metabolism%22">Metabolism</searchLink><br /><searchLink fieldCode="DE" term="%22Plant+growth+promoting+substances%22">Plant growth promoting substances</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+metabolism%22">Energy metabolism</searchLink>
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  Data: Increasing evidence shows that static magnetic fields (SMFs) can affect microbial growth metabolism, but the specific mechanism is still unclear. In this study, we have investigated the effect of moderate-strength SMFs on growth and vitamin K2 biosynthesis of Flavobacterium sp. m1-14. First, we designed a series of different moderate-strength magnetic field intensities (0, 50, 100, 150, 190 mT) and exposure times (0, 24, 48, 72, 120 h). With the optimization of static magnetic field intensity and exposure time, biomass and vitamin K2 production significantly increased compared to control. The maximum vitamin K2 concentration and biomass were achieved when exposed to 100 mT SMF for 48 h; compared with the control group, they increased by 71.3% and 86.8%, respectively. Interestingly, it was found that both the cell viability and morphology changed significantly after SMF treatment. Second, the adenosine triphosphate (ATP) and glucose-6-phosphate dehydrogenase (G6PDH) metabolism is more vigorous after exposed to 100 mT SMF. This change affects the cell energy metabolism and fermentation behavior, and may partially explain the changes in bacterial biomass and vitamin K2 production. The results show that moderate-strength SMFs may be a promising method to promote bacterial growth and secondary metabolite synthesis. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Bioprocess & Biosystems Engineering is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s00449-019-02186-7
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        Text: English
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        StartPage: 1923
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      – SubjectFull: Flavobacterium
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      – SubjectFull: Morphology
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