Dynamic shift of the epibacterial communities on commercially cultivated Saccharina japonica from mature sporophytes to sporelings and juvenile sporophytes

Han, Q, Zhang, X, Chang, L, Xiao, L, Ahmad, R, Saha, M, Wu, H and Wang, G 2021 Dynamic shift of the epibacterial communities on commercially cultivated Saccharina japonica from mature sporophytes to sporelings and juvenile sporophytes. Journal of Applied Phycology, 33 (2). 1171-1179. https://doi.org/10.1007/s10811-020-02329-4

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Abstract/Summary

The supply of healthy sporelings plays a crucial role in the successful aquaculture of commercially cultivated brown kelp Saccharina japonica. Epibacteria are of critical importance for maintaining seaweed health and development. Thus, this study aimed to investigate the epibacterial community associated with mature sporophytes and 1.5- and 2.0-month-old sporelings, as wellasjuvenilesporophytesofS.japonicabyusing16SrRNA geneampliconsequencingandpredictedthebacterial functional profiles. We found that Proteobacteria, Verrucomicrobia, Bacteroidetes, and Planctomycetes were the main phyla, while Loktanella and Rubritalea and Persicirhabdus were the dominant genera for all four developmental stages. Highly abundant core microbiota included Persicirhabdus, Loktanella, Litorimonas, andRubritalea. Further analysis of the predicted functions showedthatdifferentmetabolicfunctionswereinvolvedatdifferentdevelopmentalstages.Moremetabolicfunctionswerefound in 2-month-old sporelings and mature sporophytes. Both the diversity, composition of the epiphytic bacterial communities, and metabolicfunctionschangedaccordingtodifferent developmentalstagesatleast in1.5-and2-month-oldsporelings. Ourresults not only provide fundamental knowledge for the epibacteria associated with S. japonica but will also help nursery farms in preventingandmitigatingthediseaseoutbreaksbymonitoringthevariationsoftheepibacterialcommunitiesatthenurserystage

Item Type:	Publication - Article
Additional Keywords:	Epibacterialcommunities .16SrRNAgene .Phaeophyceae Saccharinajaponica .Sporelings
Divisions:	Plymouth Marine Laboratory > Science Areas > Marine Ecology and Biodiversity
Depositing User:	S Hawkins
Date made live:	26 Mar 2021 11:08
Last Modified:	26 Mar 2021 11:08
URI:	https://plymsea.ac.uk/id/eprint/9163

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