Synergistic microcystin degradation by a novel bacterium isolated from shrimp pond and fulvic acids

Genghua QIN; Wei DAI; Xiangdong BI; Jiang WU; Weilin RUAN; Yanzhao WANG

doi:10.1007/s00343-024-3273-z

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Synergistic microcystin degradation by a novel bacterium isolated from shrimp pond and fulvic acids

Special Section: Scientific control of cyanobacterial blooms and their secondary hazards | Updated：2024-12-24

- Synergistic microcystin degradation by a novel bacterium isolated from shrimp pond and fulvic acids
- Journal of Oceanology and Limnology Vol. 42, Issue 6, Pages: 1817-1826(2024)
- Affiliations：
  
  Key Laboratory of Aquatic-Ecology and Aquaculture of Tianjin, Department of Fisheries Sciences, Tianjin Agricultural University, Tianjin300384, China
- Author bio：
  
  yl801123@aliyun.com
- Funds：
- DOI：10.1007/s00343-024-3273-z
  CLC：
- Received：31 December 2023，
  
  Published：01 November 2024
- Accepted：
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QIN Genghua,DAI Wei,BI Xiangdong,et al.Research Paper Synergistic microcystin degradation by a novel bacterium isolated from shrimp pond and fulvic acids[J].Journal of Oceanology and Limnology,2024,42(06):1817-1826.
DOI：

QIN Genghua,DAI Wei,BI Xiangdong,et al.Research Paper Synergistic microcystin degradation by a novel bacterium isolated from shrimp pond and fulvic acids[J].Journal of Oceanology and Limnology,2024,42(06):1817-1826. DOI： 10.1007/s00343-024-3273-z.

摘要

Abstract

Using the Widdel medium with extracted microcystin (MC) as the sole carbon and nitrogen sources

the MC-degrading bacteria community

was enriched from the sediment of

Litopenaeus

vannamei

pond

and a novel MC-degrading bacteria strain was isolated from

. According to 16S rDNA gene sequence and biochemical characteristics

the isolated strain was identified and named

Nitratireductor

aquimarinus

. Fulvic acid (FA)

as a widely existing photosensitizer involved in MC photodegradation

coexists with MC-degrading bacteria in natural water. The synergistic effects of

aquimarinus

and FA on MC degradation were evaluated via comparing the degradation rate of MC induced by

aquimarinus

and FA alone and in combination under natural light conditions. Compared with the control group

the supplementation of

aquimarinus

and FA alone or in combination could significantly increase the degradation rate of MC (

0.05). In the first 36 h

the degradation effect of FA on MC was better than that of

aquimarinus

but the degradation effect was opposite at 48 h.

aquimarinus

and FA did not show synergistic effect on MC degradation until 48 h. In the application of

aquimarinus

and FA to degrade MC in aquaculture pond

there mi

ght be a time-lag effect in the synergistic degradation.

关键词

Keywords

references

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