Flavobacterium ajazii sp. nov., Isolated from Seaweed of Gouqi Island, China

Abstract

A novel bacterium designated SSM4.2 T was isolated from seaweed of Gouqi Island, which is the center of the Zhoushan fishing ground in the East China Sea. Strain SSM4.2 T was Gram-stain-negative, bright yellow-pigmented, short rod-shaped, non-flagellated, non-spore forming, aerobic and motile by gliding. Growth was observed at 4-37 °C (optimum 25-30 °C), pH 6.0-8.0 (optimum pH 7.0) and 0-2.0% (w/v) NaCl (optimum 0%) concentration. The strain was catalase-and oxidasepositive. Menaquinone-6 (MK-6) was found as the sole respiratory quinone and zeaxanthin as the main carotenoid pigment. The predominant fatty acids (≥ 10%) were iso-C 15:0 , iso-C 15:1 G, iso-C 17:0 3-OH and summed feature 3 (C 16:1 ω7c /C 16:1 ω6c). The major polar lipid was phosphatidylethanolamine (PE). The genome size was 5.7 Mbp. The DNA G + C content was 34.1 mol%. 16S rRNA gene sequence revealed that strain SSM4.2 T belongs to the genus Flavobacterium and shares high-sequence similarity with F. limi KACC 18851 T (98.1%), F. hydrophilum KACC 19591 T (97.6%), F. defluvii KCTC 12612 T (97.1%), F. cheongpyeongense KACC 19592 T (97.0%) and F. fluviatile KCTC 52446 T (96.9%). Strain SSM4.2 T had 73.2-84.6% average nucleotide identity and 19.1-29.4% digital DNA-DNA hybridization values with its closest type strains. Based on its phenotypic, chemotaxonomic, phylogenetic and genomic features, strain SSM4.2 T represents a novel species of the genus Flavobacterium, for which the name Flavobacterium ajazii sp. nov. is proposed. The type strain is SSM4.2 T (= KCTC 72807 T = MCCC 1K04370 T ).

Carotenoid Cocktail Produced by An Antarctic Soil Flavobacterium with Biotechnological Potential

“…The exact proportion of zeaxanthin and lutein produced is not easy to resolve given that both compounds are structural isomers, whose differences cannot be resolved using only MS [52,53]. However, previous studies have reported that the main carotenoid pigment produced by the Flavobacterium genus is zeaxanthin, which also correlates with our work [54][55][56][57].…”

Flavobacterium litorale sp. nov., isolated from red alga

“…Recently, seaweed has been studied as a source of prebiotics for two human gut bacteria, Bifidobacterium longum and Bacteroides plebeius , with the ability to degrade and utilize seaweed polysaccharides [2]. Furthermore, seaweeds are biological reservoirs of abundant marine bacteria [3, 4]. The phylum Bacteroidota is one of the marine bacterial groups that contain many genera isolated from seaweed and is a predominant degrader of marine polysaccharide and thus plays a crucial role in the carbon cycle in the marine ecosystem.…”

“…The marine members of the bacteroidetal class Flavobacteria have been associated with the degradation of marine high molecular weight particulate organic matter, since the marine Flavobacterium strains are often enriched on detritus and colonize surfaces of living organisms, such as corals, algae and higher plants [16]. Recently, many Flavobacterium species such as Flavobacterium ajazii [4], Flavobacterium coralii [17], Flavobacterium jocheonensis [18] and Flavobacterium zhairuonensis [19] have been isolated from various marine samples, including seaweed, coral, marine green algae and sediment, respectively.…”

Valid publication of new names and new combinations effectively published outside the IJSEM

“…13 The effective publication states that the type strain was also deposited as KCTC 62952, but no documentation was supplied. 14 The protologue heading must read 'Description of Paenibacillus dakarensis sp. nov.' instead of 'Description of Paenibacillus dakarensis strain FF9 T sp.…”