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Alterations in Epiphytic Bacterial Communities during the Occurrence of Green Rot Disease in Saccharina japonica Seedlings

文献类型： 外文期刊

作者： Yan, Yongwei 1 ; Wang, Shanshan 2 ; Li, Jie 1 ; Liu, Fuli 1 ; Mo, Zhaolan 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Minist Agr & Rural Affairs,Lab Marine Fisheries S, Key Lab Maricultural Organism Dis Control,Pilot N, Qingdao 266071, Peoples R China

2.Harbin Univ Sci & Technol, Rongcheng Campus, Weihai 264300, Peoples R China

3.Ocean Univ China, Sanya Oceanol Inst, Key Lab Trop Aquat Germplasm Hainan Prov, Sanya 572000, Peoples R China

关键词： bacterial community; green rot disease; Saccharina japonica; seedlings

期刊名称：JOURNAL OF MARINE SCIENCE AND ENGINEERING （ 影响因子：2.744； 五年影响因子：2.727 ）

ISSN：

年卷期： 2022 年 10 卷 6 期

页码：

收录情况： SCI

摘要： Bacteria are one of the causes of green rot disease (GRD) in Saccharina japonica mariculture, which may lead to complete failure of seedling production. However, the association between bacterial community and host disease severity remains largely unknown. Therefore, in this study, the bacterial communities associated with GRD-infected seedlings with naturally varying disease severity from two seedling hatcheries in Northern China were analyzed to investigate the interactions between bacterial communities and GRD. The results indicated incorrect nutrient supply in both sites. Gammaproteobacteria, Alphaproteobacteria, and Bacteroidetes were prevalent in all samples. Significant structural alterations were detected for epibacterial communities, which were further evidenced by differently abundant bacterial taxa associated with seedlings with varying disease severity. The predicted pathways of bacterial adhesion and antimicrobial compounds biosynthesis were significantly enriched in less severely diseased seedlings, whereas glutathione metabolism and lipopolysaccharide biosynthesis were significantly increased in more severely diseased seedlings. The predicted categories of a two-component system, flagellar assembly, bacterial chemotaxis, and biofilm formation were significantly enriched in the bacterioplankton in more severely infected seawater. The differential bacterial community compositions and predicted functions provide new clues to elucidate the mechanism underlying the interaction between GRD occurrence and bacterial communities.

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