Surface-attached and suspended bacterial community structure as affected by C/N ratios: relationship between bacteria and fish production
文献类型： 外文期刊
作者： Yu, Ermeng 1 ; Xie, Jun 2 ; Wang, Jinlin 2 ; Ako, Harry 3 ; Wang, Guangjun 2 ; Chen, Zhanghe 1 ; Liu, Yongfeng 4 ;
作者机构： 1.S China Normal Univ, Coll Life Sci, Zhongshan Rd West 55, Guangzhou 510631, Guangdong, Peoples R China
2.CAFS, Pearl River Fisheries Res Inst, Key Lab Trop & Subtrop Fishery Resource Applicat, XingYu Rd, Guangzhou 510380, Guangdong, Peoples R China
3.Univ Hawaii Manoa, Dept Mol Biosci & Bioengn, Honolulu, HI 96822 USA
4.BGI Shenzhen, Main Bldg 11-F, Shenzhen 518083, Peoples R China
关键词： Bacterial community structure; Grass carp; C/N ratio; Surface-attached; Illumina sequencing
期刊名称：WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY （ 影响因子：3.312； 五年影响因子：3.58 ）
ISSN： 0959-3993
年卷期： 2016 年 32 卷 7 期
页码：
收录情况： SCI
摘要： Bacteria play crucial roles in the combined system of substrate addition and C/N control, which has been demonstrated to improve aquaculture production. However, the complexity of surface-attached bacteria on substrates and suspended bacteria in the water column hamper further application of this system. This study firstly applied this combined system into the culture of grass carp, and then explored the relationship between microbial complexes from surface-attached and suspended bacteria in this system and the production of grass carp. In addition, this study investigated bacterial community structures as affected by four C/N ratios using Illumina sequencing technology. The results demonstrated that the weight gain rate and specific growth rate of grass carp in the CN20 group (C/N ratio 20:1) were the highest (P < 0.05), and dietary supplementation of the microbial complex had positive effects on the growth of grass carp (P < 0.05). Sequencing data revealed that, (1) the proportions of Verrucomicrobiae and Rhodobacter (surface-attached), seditninibacterium (suspended), and etnticicia (surface-attached and suspended) were much higher in the CN20 group compared with those in the other groups (P < 0.05); (2) Rhodobacter, Flavobacteriutn, Acinetobacter, Pseudotnonas, Planctotnyces, and Cloacibacteriutn might be important for the microbial colonization on substrates; (3) as the C/N ratio increased, proportions of Hydrogenophaga (surface-attached and suspended), Zoogloea, and Flectobacillus (suspended) increased, but proportions of Bacillus, Clavibacter, and Cellvibro (surface-attached and suspended) decreased. In summary, a combined system of substrate addition and C/N control increased the production of grass carp, and Verrucomicrobiae and Rhodobacter in the surface-attached bacterial community were potential probiotic bacteria that contributed to the enhanced growth of grass carp.
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