Algibacillus agarilyticus gen. nov., sp. nov., isolated from the surface of the red algae Gelidium amansii

Author:

Meng Xue1,Chang Ya-Qi1,Wang Huan1,Du Zong-Jun21ORCID

Affiliation:

1. Marine College, Shandong University, Weihai, Shandong, 264209, PR China

2. State key Laboratory of Microbial Technology, Shandong University, Qingdao, Shandong, 266237, PR China

Abstract

A novel Gram-stain-negative, strictly aerobic, coccoid and agar-hydrolysing bacterium, designated RQJ05T, was isolated from the marine red algae Gelidium amansii collected from the coastal area of Rizhao, PR China. Cells of strain RQJ05T were approximately 0.8–1.0×1.3–3.0 µm in size and motile by means of a polar flagellum. Growth occurred at 4–33 °C (optimum, 25–30 °C), pH 7.0–8.5 (optimum, pH 7.5–8.0) and in the presence of 1.0–7.0 % (w/v) NaCl (optimum, 2.0–3.0 %). Strain RQJ05T showed oxidase-positive and catalase-negative activities. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain RQJ05T formed a phylogenetic lineage with members of the family Alteromonadaceae and exhibited 16S rRNA gene sequence similarities of 92.6, 91.3, 90.2 and 90.1 % to Catenovulum maritimum Q1T, Catenovulum agarivorans YM01T, Paraphotobacterium marinum NSCS20N07DT and Algicola sagamiensis B-10-31T, respectively. The major cellular fatty acids of strain RQJ05T were summed feature 3 (C16 : 1  ω7c and/or C16 : 1  ω6c), C16 : 0 and summed feature 8 (C18 : 1  ω7c and/or C18 : 1  ω6c). The major polar lipids of strain RQJ05T were phosphatidylethanolamine, phosphatidylglycerol and two aminophospholipids. Strain RQJ05T contained Q-8 as the major respiratory quinone. The genomic DNA G+C content was 39.0 mol%. On the basis of genotypic, phenotypic and phylogenetic evidence, strain RQJ05T is presented as a representative of a novel species in a new genus, for which the name Algibacillus agarilyticus gen. nov., sp. nov. is proposed. The type strain is RQJ05T (=KCTC 62846T=MCCC 1H00352T).

Funder

National Natural Science Foundation of China

Publisher

Microbiology Society

Subject

General Medicine,Ecology, Evolution, Behavior and Systematics,Microbiology

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