Effects of intestinal bacterial biofilms on settlement process of larvae and plantigrades in <i>Mytilus coruscus</i>

Xu Jiakang; Wang Jinsong; Fang Yihan; Yang Jinlong; Liang Xiao

doi:10.12284/hyxb2021112

Volume 43 Issue 9

Sep. 2021

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Xu Jiakang，Wang Jinsong，Fang Yihan, et al. Effects of intestinal bacterial biofilms on settlement process of larvae and plantigrades in Mytilus coruscus[J]. Haiyang Xuebao，2021, 43(9)：81–91 doi: 10.12284/hyxb2021112

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Xu Jiakang，Wang Jinsong，Fang Yihan, et al. Effects of intestinal bacterial biofilms on settlement process of larvae and plantigrades in Mytilus coruscus[J]. Haiyang Xuebao，2021, 43(9)：81–91 doi: 10.12284/hyxb2021112

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Effects of intestinal bacterial biofilms on settlement process of larvae and plantigrades in Mytilus coruscus

doi: 10.12284/hyxb2021112

Xu Jiakang^{1, 2
,},
Wang Jinsong^{1, 2},
Fang Yihan^{1, 2},
Yang Jinlong^{1, 2, 3},
Liang Xiao^{1, 2
,
,}

1.
International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai 201306, China
2.
Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China
3.
Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China

Received Date: 2020-12-30
Rev Recd Date: 2021-03-31

Available Online: 2021-05-19

Publish Date: 2021-09-25

Abstract

Abstract

Ten strains of bacteria were isolated from the gut of Mytilus coruscus to study its role in the settlement of larvae and plantigrade by forming biofilms. Results showed that the inducing ability of the biofilms formed by ten bacteria were different, although all of them could induce the settlement of larvae and plantigrade. In larvae, Bacillus sp.4 showed high inducing activity, while Phaeobacter sp.1 had low inducing activity. In plantigrades, Phaeobacter sp.1 showed high inducing activity, while Bacillus sp.4 showed low inducing activity. The polysaccharides and proteins from biofilms formed by Bacillus sp.4 and Phaeobacter sp.1 impacted larval settlement and metamorphosis, and the cell density, thickness and extracellular lipids of biofilm showed no effect on inducing activity of larval settlement and metamorphosis. For plantigrades, biofilm’s bacterial density, thickness and extracellular α-polysaccharide could induce plantigrades to the settlement, and the extracellular lipids and proteins of biofilms did not affect the settlement. This study is helpful for improving the healthy ecological culture of M. coruscus and to understand the settlement mechanism of M. coruscus.
- intestinal bacteria,
- Mytilus coruscus,
- biofilm,
- inducing activity; settlement

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References(35)

References

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