Journal of Microbiology

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Brachybacterium kimchii sp. nov. and Brachybacterium halotolerans subsp. kimchii subsp. nov., isolated from the Korean fermented vegetables, kimchi, and description of Brachybacterium halotolerans subsp. halotolerans subsp. nov.: Yujin Kim , Yeon Bee Kim , Juseok Kim , Joon Yong Kim , Tae Woong Whon , Won-Hyong Chung , Eun-Ji Song , Young-Do Nam , Se Hee Lee , Seong Woon Roh; J. Microbiol. 2022;60(7):678-688. Published online July 4, 2022; DOI: https://doi.org/10.1007/s12275-022-1581-6

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Two Gram-stain-positive, oxidase-negative, catalase-positive, and coccus-shaped bacterial strains, designated CBA3104T and CBA3105T, were isolated from kimchi. Strain CBA3104T and CBA3105T grew at 10–35°C (optimum, 25°C and 30°C, respectively), at pH 6.0–8.5 (optimum, pH 6.5), and in the presence of 0–15% (w/v) NaCl (optimum, 5%). A phylogenetic analysis based on 16S rRNA gene sequences revealed that strain CBA3104T formed a distinct phylogenetic lineage within the genus Brachybacterium whereas strain CBA3105T was closely positioned with Brachybacterium halotolerans MASK1Z-5T. The 16S rRNA gene sequence similarity between strains CBA3104T and CBA3105T was 99.9%, but ANI and dDDH values between strains CBA3104T and CBA3105T were 93.61% and 51.5%, respectively. Strain CBA3104T showed lower ANI and dDDH values than species delineation against three closely related strains and type species of the genus Brachybacterium, however, strain CBA3105T showed 96.63% ANI value and 69.6% dDDH value with Brachybacterium halotolerans MASK1Z-5T. Among biochemical analysis results, strain CBA3104T could uniquely utilize bromo-succinic acid whereas only strain CBA3105T was positive for alkaline phosphatase and α-fucosidase among two novel strains, closely related strains, and type species of the genus Brachybacterium. Compared with strain CBA3105T and Brachybacterium halotolerans JCM 34339T, strain CBA3105T was differentially positive for acid production of D-arabinose, D-adonitol, and potassium 5-ketogluconate and enzyme activity of β-glucuronidase. Both strains contained menaquinone-7 as the dominant quinone. The cell-wall peptidoglycan of two novel strains contained meso-diaminopimelic acid. The major fatty acids of strains CBA3104T and CBA3105T were anteiso-C15:0, anteiso-C17:0, and iso-C16:0. The major polar lipids of both strains were phosphatidylglycerol and diphosphatidylglycerol. Strain CBA3104T possessed a uniquely higher abundance of tRNA (97 tRNAs) than four Brachybacterium strains used for comparative taxonomic analysis (54–62 tRNAs). Both the CBA3104T and CBA3105T strain harbored various oxidoreductase, transferase, hydrolase, and lyase as strain-specific functional genes compared to closely related strains and Brachybacterium type species. The results of biochemical/physiological, chemotaxonomic, and genomic analyses demonstrated that strains CBA3104T and CBA3105T represent a novel species of the genus Brachybacterium and a novel subspecies of B. halotolerans, respectively, for which the names Brachybacterium kimchii sp. nov. and B. halotolerans subsp. kimchii subsp. nov. are proposed. The type strains of the novel species and the novel subspecies are CBA3104T (= KCCM 43417T = JCM 34759T) and CBA3105T (= KCCM 43418T = JCM 34760T), respectively.

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Metagenomic Insights into the Taxonomic and Functional Features of Traditional Fermented Milk Products from Russia
Alexander G. Elcheninov, Kseniya S. Zayulina, Alexandra A. Klyukina, Mariia K. Kremneva, Ilya V. Kublanov, Tatiana V. Kochetkova
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Aharon Oren, George M. Garrity
International Journal of Systematic and Evolutionary Microbiology .2022;[Epub] CrossRef
Complete Genome Sequence of Brachybacterium sp. Strain NBEC-018, Isolated from Nematode-Infected Potatoes
Ling Chen, Yueying Wang, Nanxi Liu, Lei Zhu, Yong Min, Yimin Qiu, Yuxi Tian, Xiaoyan Liu, David Rasko
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Role of putative virulence traits of Campylobacter jejuni in regulating differential host immune responses: Ankita Singh , Amirul Islam Mallick; J. Microbiol. 2019;57(4):298-309. Published online February 22, 2019; DOI: https://doi.org/10.1007/s12275-019-8165-0

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Abstract

Among the major enteric pathogens, Campylobacter jejuni is considered an important source of diarrheal illness in humans. In contrast to the acute gastroenteritis in humans, C. jejuni exhibits prolonged cecal colonization at a high level with little or no pathology in chickens. Although several known virulence determinants of C. jejuni have been found to be associated with a higher degree of pathogenesis in humans, to date, little is known about their functions in the persistent colonization of chickens. The present study was undertaken to assess the role of C. jejuni in imparting differential host immune responses in human and chicken cells. Based on the abundance of major genes encoding virulence factors (GEVFs), we used a particular isolate that harbors the cadF, flaA, peb1, racR, ciaB, cdtB, and hcp genes. This study showed that hypervirulent C. jejuni isolate that encodes a functional type VI secretion system (T6SS) has a greater ability to invade and create characteristic “attaching and effacing” lesions in human INT407 compared to primary chicken embryo intestinal cells (CEICs). Furthermore, we demonstrated that the higher bacterial invasion in human INT407 triggered higher levels of expression of major proinflammatory cytokines, such as IL- 1β and IL-6, and significant downregulation of IL-17A gene expression (P ≤ 0.05). The findings of the present study suggest that the enhanced ability of C. jejuni to invade human cells is tightly regulated by proinflammatory cytokines in the gut and possibly holds the keys to the observed differences in pathogenesis between human and chicken cells.

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Identification and functional characterization of putative ligand binding domain(s) of JlpA protein of Campylobacter jejuni
Chandan Gorain, Subhadeep Gupta, S.S. Mahafujul Alam, Mehboob Hoque, Andrey V. Karlyshev, Amirul Islam Mallick
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Afruja Khan, Avijit Sardar, Pradip K. Tarafdar, Amirul I. Mallick
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Kashaf Javed, Farzana Gul, Rashda Abbasi, Sidra Batool, Zobia Noreen, Habib Bokhari, Sundus Javed
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Gut Microbe-Derived Outer Membrane Vesicles: A Potential Platform to Control Cecal Load of Campylobacter jejuni
Ankita Singh, Afruja Khan, Tamal Ghosh, Samiran Mondal, Amirul I. Mallick
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Mucosal delivery of live Lactococcus lactis expressing functionally active JlpA antigen induces potent local immune response and prevent enteric colonization of Campylobacter jejuni in chickens
Chandan Gorain, Ankita Singh, Sudipta Bhattacharyya, Anirban Kundu, Aritraa Lahiri, Subhadeep Gupta, Amirul I. Mallick
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Immunopathological properties of the Campylobacter jejuni flagellins and the adhesin CadF as assessed in a clinical murine infection model
Anna-Maria Schmidt, Ulrike Escher, Soraya Mousavi, Nicole Tegtmeyer, Manja Boehm, Steffen Backert, Stefan Bereswill, Markus M. Heimesaat
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A One Health approach to prevention, treatment, and control of campylobacteriosis
Francesca Schiaffino, James Platts-Mills, Margaret N. Kosek
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Immunogenicity and protective efficacy of mucosal delivery of recombinant hcp of Campylobacter jejuni Type VI secretion system (T6SS) in chickens
Ankita Singh, Khairun Nisaa, Sudipta Bhattacharyya, Amirul Islam Mallick
Molecular Immunology.2019; 111: 182. CrossRef

Paenibacillus albilobatus sp. nov., isolated from acidic soil on Jeju Island: Jae-Won Lee , Ye-Eun Kim , Myung-Suk Kang , Ki-Eun Lee , Eun-Young Lee , Soo-Je Park; J. Microbiol. 2018;56(6):393-398. Published online June 1, 2018; DOI: https://doi.org/10.1007/s12275-018-8158-4

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Abstract

A rod-shaped, white color colony with lobate architectures, strain h2T was isolated from a moderately acidic soil on Jeju Island, Republic of Korea. Comparative analysis of the 16S rRNA gene sequence showed that the strain h2T is closely related to Paenibacillus relictisesami DSM 25385T (97.4%, 16S rRNA gene sequence similarity), Paenibacillus azoreducens KACC 11244T (97.2%), and Paenibacillus cookii LMG 18419T (97.0%). DNA-DNA hybridization indicated that the strain h2T has relatively low levels of DNA-DNA relatedness with respect to P. relictisesami DSM 25385T (10.2%) and P. azoreducens KACC 11244T (13.7%). Additionally, the genomic DNA G + C content of h2T is 51.5 mol%. The isolated strain grew at pH 4.0–9.0 (optimum, pH 6.0–7.0) and 0–5% (w/v) NaCl (optimum, 0%) and a temperature of 15–45°C (optimum 35°C). The quinones in the strain are MK-6 and MK-7, and the predominant fatty acid is C15:0 anteiso (32.1%) followed by C17:0 anteiso (26.5%), and C16:0 iso (21.0%). Based on its phenotypic properties, genotypic distinctiveness, and chemotaxonomic features, strain h2T is proposed as a novel species in the genus Paenibacillus, for which the name Paenibacillus albilobatus sp. nov. is proposed (= KCCM 43269T = JCM 32395T = LMG 30408T). The type strain of Paenibacillus albilobatus is h2T.

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Description of Paenibacillus dokdonensis sp. nov., a new bacterium isolated from soil
Jayoung Paek, Lu Bai, Yeseul Shin, Hongik Kim, Joong-Ki Kook, Young-Hyo Chang
International Journal of Systematic and Evolutionary Microbiology .2019;[Epub] CrossRef

Burkholderia alba sp. nov., isolated from a soil sample on Halla mountain in Jeju island: Jae-Won Lee , Ye-Eun Kim , Soo-Je Park; J. Microbiol. 2018;56(5):312-316. Published online May 2, 2018; DOI: https://doi.org/10.1007/s12275-018-8034-2

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Abstract

A rod-shaped, round and white colony-forming strain AD18T was isolated from the soil on Halla mountain in Jeju Island, Republic of Korea. Comparative analysis of 16S rRNA gene sequence revealed that this strain was closely related to Burkholderia oklahomensis C6786T (98.8%), Burkholderia thailandensis KCTC 23190T (98.5%). DNA-DNA relatedness (14.6%) indicated that the strain AD18T represents a distinct species that is separate from B. oklahomensis C6786T. The isolate grew at pH 5.0–9.0 (optimum, pH 7.0), 0–3% (w/v) NaCl (optimum, 0%), and temperature 10–40°C (optimum 35°C). The sole quinone of the strain was Q-8, and the predominant fatty acids were C16:0, C17:0 cyclo, and C19:0 cyclo ω8c. The genomic DNA G + C content of AD18T was 65.6 mol%. Based on these findings, strain AD18T is proposed to be a novel species in the genus Burkholderia, for which the name Burkholderia alba sp. nov. is proposed (= KCCM 43268T = JCM 32403T). The type strain is AD18T.

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Potential of Novel Sequence Type of Burkholderia cenocepacia for Biological Control of Root Rot of Maize (Zea mays L.) Caused by Fusarium temperatum
Setu Bazie Tagele, Sang Woo Kim, Hyun Gu Lee, Youn Su Lee
International Journal of Molecular Sciences.2019; 20(5): 1005. CrossRef

A diversity study of Saccharomycopsis fibuligera in rice wine starter nuruk, reveals the evolutionary process associated with its interspecies hybrid: Mohamed El-Agamy Farh , Yunjoo Cho , Jae Yun Lim , Jeong-Ah Seo; J. Microbiol. 2017;55(5):337-343. Published online April 29, 2017; DOI: https://doi.org/10.1007/s12275-017-7115-y

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Abstract

The amylolytic yeast Saccharomycopsis fibuligera is the pre-dominant yeast in the starter product, nuruk, which is utilized for rice wine production in South Korea. Latest molecular studies explore a recently developed interspecific hybridiza-tion among stains of S. fibuligera with a unique genetic fea-ture. However, the origin of the natural hybridization occur-rence is still unclear. Thus, to respectively distinguish paren-tal and hybrid strains, specific primer sets were applied on 141 yeast strains isolated from different nuruk samples fer-mented in different provinces. Sixty-seven strains were de-fined accordingly as parental species with genome A while 8 strains were defined as hybrid strains. Unexpectedly, another parental species with genome B could not be found among the strain pools yet. Furthermore, it was observed that hybrid strains are phenotypically different from A genome strains; asci containing tetrad ascospores were observed in A genome strains more frequent than in hybrid strains. Nevertheless, hybrid strains were slightly more thermotolerant than A ge-nome strains. Interestingly, all hybrid strains were located only in Jeju province. Based on these sets of data, we specu-lated that the unique climate of Jeju province might play an evolutionary role in the interspecific hybridization between A genome strains, as well as the unculturable allopatric B ge-nome strains.

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Exploring the prebiotic potential of fermented glutinous rice filtrate: In vitro skin bacterial balance and biological activities
Jayanant Iemsam-arng, Suvimol Surassmo, Thanisorn Mahatnirunkul, Kulika Weizman, Chitrada Roy Kaweeteerawat, Atikorn Panya, Choochart Warin, Thitikorn Chomtong, Plernta Sukjarernchaikul
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Epidemiological relationships of Campylobacter jejuni strains isolated from humans and chickens in South Korea: Jae-Young Oh , Yong-Kuk Kwon , Bai Wei , Hyung-Kwan Jang , Suk-Kyung Lim , Cheon-Hyeon Kim , Suk-Chan Jung , Min-Su Kang; J. Microbiol. 2017;55(1):13-20. Published online December 30, 2016; DOI: https://doi.org/10.1007/s12275-017-6308-8

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Abstract

Thirty-nine human isolates of Campylobacter jejuni obtained from a national university hospital during 2007–2010 and 38 chicken isolates of C. jejuni were collected from poultry farms during 2009–2010 in South Korea were used in this study. Campylobacter genomic species and virulence-associated genes were identified by PCR. Pulsed-field gel electrophoresis (PFGE) and multilocus sequence typing (MLST) were performed to compare their genetic relationships. All isolates were highly resistant to ciprofloxacin, nalidixic acid, and tetracycline. Of all isolates tested, over 94% contained seven virulence associated genes (flaA, cadF, racR, dnaJ, cdtA, cdtB, and cdtC). All isolates were classified into 39 types by PFGE clustering with 90% similarity. Some chicken isolates were incorporated into some PFGE types of human isolates. MLST analysis for the 39 human isolates and 38 chicken isolates
result
ed in 14 and 23 sequence types (STs), respectively, of which 10 STs were new. STs overlapped in both chicken and human isolates included ST-21, ST-48, ST-50, ST-51, and ST-354, of which ST-21 was the predominant ST in both human and chicken isolates. Through combined analysis of PFGE types and STs, three chicken isolates were clonally related to the three human isolates associated with food poisoning (VII-ST-48, XXII-ST-354, and XXVIII-ST-51). They were derived from geographically same or distinct districts. Remarkably, clonal spread of food poisoning pathogens between animals and humans was confirmed by population genetic analysis. Consequently, contamination of campylobacters with quinolone resistance and potential virulence genes in poultry production and consumption may increase the risk of infections in humans.

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Review

MINIREVIEW] Korean indigenous bacterial species with valid names belonging to the phylum Actinobacteria: Kyung Sook Bae , Mi Sun Kim , Ji Hee Lee , Joo Won Kang , Dae In Kim , Ji Hee Lee , Chi Nam Seong; J. Microbiol. 2016;54(12):789-795. Published online November 26, 2016; DOI: https://doi.org/10.1007/s12275-016-6446-4

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Abstract

To understand the isolation and classification state of actinobacterial species with valid names for Korean indigenous isolates, isolation source, regional origin, and taxonomic affiliation of the isolates were studied. At the time of this writing, the phylum Actinobacteria consisted of only one class, Actinobacteria, including five subclasses, 10 orders, 56 families, and 330 genera. Moreover, new taxa of this phylum continue to be discovered. Korean actinobacterial species with a valid name has been reported from 1995 as Tsukamurella inchonensis isolated from a clinical specimen. In 1997, Streptomyces seoulensis was validated with the isolate from the natural Korean environment. Until Feb. 2016, 256 actinobacterial species with valid names originated from Korean territory were listed on LPSN. The species were affiliated with three subclasses (Acidimicrobidae, Actinobacteridae, and Rubrobacteridae), four orders (Acidimicrobiales, Actinomycetales, Bifidobacteriales, and Solirubrobacterales), 12 suborders, 36 families, and 93 genera. Most of the species belonged to the subclass Actinobacteridae, and almost of the members of this subclass were affiliated with the order Actinomycetales. A number of novel isolates belonged to the families Nocardioidaceae, Microbacteriaceae, Intrasporangiaceae, and Streptomycetaceae as well as the genera Nocardioides, Streptomyces, and Microbacterium. Twenty-six novel genera and one novel family, Motilibacteraceae, were created first with Korean indigenous isolates. Most of the Korean indigenous actionobacterial species were isolated from natural environments such as soil, seawater, tidal flat sediment, and fresh-water. A considerable number of species were isolated from artificial resources such as fermented foods, wastewater, compost, biofilm, and water-cooling systems or clinical specimens. Korean indigenous actinobacterial species were isolated from whole territory of Korea, and especially a large number of species were from Jeju, Gyeonggi, Jeonnam, Daejeon, and Chungnam. A large number of novel actinobacterial species continue to be discovered since the Korean government is encouraging the search for new bacterial species and researchers are endeavoring to find out novel strains from extreme or untapped environments.

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Research Support, Non-U.S. Gov'ts

Dyella jejuensis sp. nov., Isolated from Soil of Hallasan Mountain in Jeju Island: Min-Soo Kim , Dong-Wook Hyun , Joon Yong Kim , Soyeon Kim , Jin-Woo Bae , Eun-Jin Park; J. Microbiol. 2014;52(5):373-377. Published online May 9, 2014; DOI: https://doi.org/10.1007/s12275-014-3670-7

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Abstract

A novel bacterium, designated JP1T, was isolated from soil of Hallasan Mountain in Jeju Island. The isolate was a Gram- negative, aerobic, motile and rod-shaped (0.2–0.4 × 1.2–2.0 μm) bacterium. Phylogenetic analysis based on the 16S rRNA gene sequence showed that strain JP1T was closely related to Dyella koreensis with 97.6% similarity. Growth of strain JP1T occurred at 10–37°C, pH 5–7 and 0–1% (w/v) NaCl. The genomic DNA G+C content of strain JP1T was 62.1 mol%. The major fatty acids were iso-C16:0, iso-C17:1 ω9c, and iso- C15:0. The predominant quinone was ubiquinone-8. The major polar lipids of strain JP1T were phosphatidylglycerol, phosphatidylethanolamine, diphosphatidylglycerol, uniden-tified aminolipids and unidentified aminophospholipids. The DNA-DNA relatedness values between strain JP1T and pre-viously reported Dyella species were <10%. Based on pheno-typic, genotypic, and phylogenetic distinctness, strain JP1T represents a novel species in the genus Dyella, for which the name Dyella jejuensis sp. nov. is proposed. The type strain is JP1T (=KACC 17701T =JCM 19615T).

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NOTE] Lysinibacillus jejuensis sp. nov., Isolated from Swinery Waste: Ji-Young Kim , So-Hyun Park , Duck-Chul Oh , Young-Ju Kim; J. Microbiol. 2013;51(6):872-876. Published online December 19, 2013; DOI: https://doi.org/10.1007/s12275-013-2500-7

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Abstract

A Gram-positive, endospore-forming, rod-shaped bacterium, designated strain N2-5T, was isolated from swinery waste collected in Jeju, Republic of Korea. A phylogenetic analysis based on 16S rRNA gene sequences demonstrated that strain N2-5T formed a phyletic group within the phylum Firmicutes with less than 97.0% similarities to members of the genus Lysinibacillus, its nearest phylogenetic neighbors. The highest levels of sequence similarity to the isolate were observed against Lysinibacillus xylanilyticus XDB9T (96.8%), Lysinibacillus macroides LMG 18474T (95.6%), and Lysinibacillus parviboronicapiens BAM-582 T (95.6%). The organism grew optimally at 30°C and pH 7 and in the presence of 1–3% (w/v) NaCl. Strain N2-5T was chemotaxonomically characterized by possessing menaquinone-7 (MK-7) as the major menaquinone, and iso-C15:0 (54.9%), iso-C17:1ω10c (12.0%), and C16:1ω7c alcohol (11.8%) as the predominant fatty acids. The genomic DNA G+C content of the novel strain was 43.3 mol% and the cell-wall peptidoglycan was type A4α. The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol, and phosphatidylethanolamine. Based on its phenotypic properties and phylogenetic data, strain N2-5T (=DSM 28310T =KCTC13837 T) represents a novel species in the genus Lysinibacillus, for which the name Lysinibacillus jejuensis sp. nov. is proposed.

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Journal Article

NOTE] Winogradskyella jejuensis sp. nov., a Marine Bacterium Isolated from a Brown Alga Carpopeltis affinis: Ji-Young Kim , Duck-Chul Oh; J. Microbiol. 2012;50(5):888-892. Published online November 4, 2012; DOI: https://doi.org/10.1007/s12275-012-2447-0

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Abstract: A Gram-negative, orange-pigmented, rod-shaped bacterium, designated strain CP32T was isolated from a brown alga Carpopeltis affinis collected on the coast of Jeju Island, Republic of Korea. The isolate grew at 10–37°C (optimum 25°C) and at pH 6.5–9.5 (optimum pH 7.0). The 16S rRNA gene sequence of the isolate showed much similarity with the type strains of recognized species of the genus Winogradskyella (94.0–96.6%). The most closely related species were Winogradskyella echinorum KMM 6211T, Winogradskyella ulvae KMM 6390T, Winogradskyella thalassocola KMM 3907T, Winogradskyella poriferorum UST030701-295T, and Winogradskyella eximia KMM 3944T. The major respiratory quinone was menaquinone-6 (MK-6) and the predominant cellular fatty acids were iso-C15:1 G (24.8%), iso-C15:0 (23.4%), and iso-C17:0 3-OH (11.6 %). The DNA G+C content was 33.3 mol%. The polar lipid profile was composed of phosphatidylethanolamine, two aminolipids, and five unknown lipids. On the basis of phenotypic features, and the result of 16S rRNA gene sequence analysis, strain CP32T (=KCTC 23835T =JCM 18454T) represents a novel species of the genus Winogradskyella, for which the name Winogradskyella jejuensis sp. nov. is proposed.

Research Support, Non-U.S. Gov'ts

Sphingomonas jejuensis sp. nov., Isolated from Marine Sponge Hymeniacidon flavia: Sanghwa Park , Akira Yokota , Takashi Itoh , Jin-Sook Park; J. Microbiol. 2011;49(2):238-242. Published online May 3, 2011; DOI: https://doi.org/10.1007/s12275-011-0500-z

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Abstract: A Gram-negative, non-motile, rod shaped, and orange-pigmented chemoheterotrophic bacterium, strain MS-31T was isolated from the marine sponge Hymeniacidon flavia, collected from near Jeju Island, Korea. The Strain MS-31T was subjected to a polyphasic taxonomic study. The phylogenetic analysis based on the 16S rRNA gene sequences revealed that the novel isolate could be affiliated within the genus Sphingomonas. The strain MS-31T showed 95.6% of 16S rRNA gene sequence similarity with the most closely related species Sphingomonas koreensis JSS26T. The DNA G+C content of the strain MS-31T was 69.4 mol%. The major isoprenoid quinone was ubiqunone 10 and predominant cellular fatty acids were summed feature 7 (comprising C18:1 ω7c, C18:1 ω9t and/or C18:1 ω12t, 39.7%), C16:0 (16.3%), C14:0 2OH (15.9%) and summed feature 3 (comprising C16:1 ω7c and/or C15:0 iso 2OH, 11.7%). The polar lipids were sphingoglycolipid, phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol and unidentified glycolipid. Based on the evidence from the polyphasic taxonomic study, the strain should be classified as a new species of the genus Sphingomonas. As a result, the name Sphingomonas jejuensis sp. nov. (type strain MS-31T =KCTC 23321T =NBRC 107775T) is proposed.

Gaetbulibacter jejuensis sp. nov., Isolated from Seawater: You-Sung Oh , Sang-Bin Lim , Hyung-Yeel Kahng , Byoung-Jun Yoon , Duck-Chul Oh , Jae-Ho Joa , Dong-Heon Lee; J. Microbiol. 2010;48(3):307-311. Published online June 23, 2010; DOI: https://doi.org/10.1007/s12275-010-9232-8

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Abstract: A novel marine bacterium, designated strain CNURIC014T was isolated from coastal seawater of Jeju Island in Korea. Strain CNURIC014T formed yellow colonies on marine agar 2216 and the cells were Gram-negative, non-motile, strictly aerobic, rod-shaped. The temperature, pH and NaCl ranges for growth were 15-37°C, pH 6.0-9.0 and 1.0-7.0% NaCl. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain CNURIC014T was most closely related to Gaetbulibacter marinus and Gaetbulibacter saemankumensis, with a sequence similarity of 95.1% and 94.6%, respectively. The DNA G+C content of the strain was 33.1 mol% and the major respiratory quinone was menaquinone-6. The major cellular fatty acids were iso-C15:1 (22.8%), iso-C15:0 (18.8%), summed feature 3 (iso-C15:0 2-OH/C16:1 ω7c, 12.9%) and iso-C17:0 3-OH (11.5%). On the basis of phenotypic, phylogenetic, and genotypic data, strain CNURIC014T represents a novel species within the genus Geatbulibacter, for which the name Gaetbulibacter jejuensis sp. nov. is proposed. The type strain is CNURIC014T (=KCTC 22615T =JCM 15976T).

Introduction of Saxicolous Lichens Distributed in Coastal Rocks of U-do Islet in Jeju, Korea: Hyung-Yeel Kahng , Byoung-Jun Yoon , Sung-Hyun Kim , Duck-Ja Shin , Jae-Seoun Hur , Hyun-Woo Kim , Eui-Sung Kang , Kye-Heon Oh , Young Jin Koh; J. Microbiol. 2004;42(4):292-298.; DOI: https://doi.org/2108 [pii]

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Abstract: This study reports, for the first time, the ivestigation of the distribution of Korean saxicolous lichens in the coastal rocks of U-do islet, which is known as an unpolluted zone in Jeju. More than thirty lichens were obtained and investigated from the coastal rocks frequently contacted by seawater. A molecular analysis using PCR amplification of the rRNA ITS regions revealed the coastal rock lichens could be placed into 8 families and 14 genera, Ramalinaceae (Bacidia, Ramalina), Physciaceae (Buellia, Dirinaria, Phaeophyscia, Physcia, Pyxine), Lecanoraceae (Candelaria, Lecanora), Parmeliaceae (Xanthoparmelia), Graphidaceae (Graphis), Pertusariaceae (Pertusaria), Rhizocarpaceae (Rhizocarpon), and Teloschistaceae (Caloplaca), showing a diversity of lichens, with foliose (flat leaf-like), crustose (crust-like), and fruticose (miniature shrub-like) life forms might be distributed in the coastal rocks. These findings suggested the possibility that the lichens identified in the present work might be resistant to a salty environment.

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