Marinobacter alexandrii sp. nov., a novel yellow-pigmented and algae growth-promoting bacterium isolated from marine phycosphere microbiota

The marine phycosphere harbors unique cross-kingdom associations with ecological relevance. During investigating the diversity of phycosphere microbiota of marine harmful algal blooms dinoflagellates, a faint yellow-pigmented bacterium, designated as strain LZ-8, was isolated from paralytic shellfis...

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Bibliographic Details
Published in:Antonie van Leeuwenhoek 2021-06, Vol.114 (6), p.709-718
Main Authors: Yang, Qiao, Feng, Qi, Zhang, Bao-ping, Gao, Jia-jun, Sheng, Zhi, Xue, Qi-ping, Zhang, Xiao-ling
Format: Article
Language:English
Subjects:
Algae
Algal blooms
Bacteria
Bacterial Typing Techniques
Biomedical and Life Sciences
Biosynthesis
Blooms (microorganisms)
Cardiolipin
Carotenoids
Deoxyribonucleic acid
Dinoflagellates
DNA
DNA sequencing
DNA, Bacterial - genetics
Eutrophication
Fatty acids
Fatty Acids - analysis
Gene clusters
Genomes
Harbors
Life Sciences
Lipids
Marinobacter
Medical Microbiology
Microbiology
Microbiota
New species
Nucleotide sequence
Original Paper
Paralytic shellfish poisoning
Phosphatidylethanolamine
Phosphatidylglycerol
Phospholipids
Phospholipids - analysis
Phylogeny
Plant Sciences
Quinones
RNA, Ribosomal, 16S - genetics
RpoD gene
rRNA 16S
Sequence Analysis, DNA
Shellfish
Siderophores
Soil Science & Conservation
Toxins
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Summary:The marine phycosphere harbors unique cross-kingdom associations with ecological relevance. During investigating the diversity of phycosphere microbiota of marine harmful algal blooms dinoflagellates, a faint yellow-pigmented bacterium, designated as strain LZ-8, was isolated from paralytic shellfish poisoning toxin-producing dinoflagellate Alexandrium catenella LZT09. The new isolate appeared to have growth-promoting potential toward its algal host. Molecular analysis using 16S rRNA gene, housekeeping rpo D gene and whole-genome sequence comparison indicated that strain LZ-8 T was a novel gammaproteobacterium of the family Alteromonadaceae. The major fatty acids of strain LZ-8 T were C 16:0 , C 18:1 ω 9c, C 12:0 3-OH, summed feature 3, C 16:1 ω 9c, C 12:0 and summed feature 9. The major isoprenoid quinone was Q-9. Polar lipids were diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, unidentified phospholipid, two unidentified aminolipids and six unidentified polar lipids. The genomic DNA G+C content was 57.36 mol%. Based on genome sequencing, several biosynthetic gene clusters responsible for bacterial biosynthesis of carotenoids and siderophores that may involve in algae–bacterial interactions were identified in the genome of strain LZ-8 T . The polyphasic characterization indicated that strain LZ-8 T represents a novel Marinobacter species. The name Marinobacter alexandrii sp. nov., type strain LZ-8 T (= CCTCC AB 2018386 T  = KCTC 72198 T ) is proposed.
ISSN:0003-6072
1572-9699
DOI:10.1007/s10482-021-01551-5