Alexandriicola marinus gen. nov., sp. nov., a new member of the family Rhodobacteraceae isolated from marine phycosphere
文献类型： 外文期刊
作者： Zhu, Wen-Zhuo 1 ; Gao, Hui-Min 1 ; Ge, Ya-Ming 2 ; Dai, Jun 3 ; Yang, Xi 4 ; Zhang, Xiao-Ling 1 ; Yang, Qiao 5 ;
作者机构： 1.Zhejiang Ocean Univ, Coll Marine Sci & Technol, Dept Marine Chem, Zhoushan, Peoples R China
2.Zhejiang Ocean Univ, Natl Engn Res Ctr Marine Aquaculture, Zhoushan, Peoples R China
3.Hubei Univ Technol, Minist Educ, Coll Bioengn,Natl Ctr Cellular Regulat & Mol Phar, Hubei Prov Cooperat Innovat Ctr Ind Fermentat,key, Wuhan, Peoples R China
4.Guangdong Acad Agr Sci, Inst Anim Sci, Guangzhou, Peoples R China
5.Zhejiang Ocean Univ, ABI Grp, Zhoushan, Peoples R China
关键词： Phycosphere microbiota; Toxic marine dinoflagellates; Alexandriicola marinus; Alexandrium catenella; Marine Rhodobacteraceae; Algae-bacteria interactions; Bacterial exopolysaccharides
期刊名称：ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY （ 影响因子：2.158； 五年影响因子：2.745 ）
ISSN： 0003-6072
年卷期： 2022 年 115 卷 4 期
页码：
收录情况： SCI
摘要： Two yellow-pigmented bacterial strains, LZ-14 (T) and ABI-LZ29, were isolated from the cultivable phycosphere microbiota of the highly toxic marine dinoflagellate Alexandrium catenella LZT09 and demonstrated obvious microalgae growth-promoting potentials toward the algal host. To elucidate the taxonomic status of the two bioactive bacterial strains, they were subjected to a polyphasic taxonomic characterization. Both strains were found to be Gram-negative, aerobic, rod-shaped and motile; to contain Q-10 as the predominant ubiquinone; summed feature 8, C-16:0, C-18:1 omega 7c 11-methyl and summed feature 3 as the major fatty acids; and diphosphatidylglycerol, phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol and two unidentified phospholipids as the predominant polar lipids. Based on the phylogenetic analysis, phylogenomic inferences and phenotypic characteristics, the strains could be clearly distinguished from phylogenetically closely related species and formed a distinct monophyletic lineage in the family Rhodobacteraceae. The size of the draft genome of strain LZ-14 (T) is 4.615 Mb, with a DNA G + C content of 63.3 mol%. It contains ten predicted secondary metabolite biosynthetic gene clusters and core genes for bacterial exopolysaccharide biosynthesis. Therefore, strain LZ-14 (T) (= CCTCC AB 2017230 (T) = KCTC 62342 (T)) represents a novel species of a new genus, for which the name Alexandriicola marinus gen. nov., sp. nov., is proposed.
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