Journal of Microbiology

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Arthrobacter dokdonellae sp. nov., isolated from a plant of the genus Campanula: Hyeon-Woo Koh , Myung-Suk Kang , Ki-Eun Lee , Eun-Young Lee , Hongik Kim , Soo-Je Park; J. Microbiol. 2019;57(9):732-737. Published online May 11, 2019; DOI: https://doi.org/10.1007/s12275-019-8540-x

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A Gram-stain-positive, oxidase- and catalase-positive, motile, aerobic, and rod-shaped bacterial strain, designated as DCT-5T, was isolated from a native plant belonging to the genus Campanula at Dokdo island, Republic of Korea. Growth of the strain DCT-5T was observed at 15–37°C (optimum 30°C) on R2A broth, pH 6.0–8.0 (optimum 7.0), and 0–5% (w/v) NaCl concentration (optimum 0%). The 16S rRNA gene sequence analysis revealed that strain DCT-5T was most closely related to Arthrobacter silviterrae KIS14-16T, Arthrobacter livingstonensis LI2T, Arthrobacter stackebrandtii CCM 2783T, Arthrobacter cryoconiti Cr6-08T, Arthrobacter ramosus CCM 1646T, and Arthrobacter psychrochitiniphilus GP3T with pairwise sequence similarities of 98.76%, 97.47%, 97.25%, 97.11%, 97.11%, and 97.00%, respectively. The DNA G+C content of strain DCT-5T was 64.7 mol%, and its DNA–DNA relatedness values with A. silviterrae KIS14-16T, A. livingstonensis LI2T, A. stackebrandtii CCM 2783T, A. psychrochitiniphilus GP3T, A. ramosus CCM 1646T, and A. cryoconiti Cr6-08T were 32.57 ± 2.02%, 28.75 ± 0.88%, 31.93 ± 1.15%, 34.73 ± 1.86%, 29.12 ± 1.56%, and 27.23 ± 0.88%, respectively. The major quinone was MK-9(H2) and major fatty acids were anteiso-C15:0, anteiso-C17:0, iso-C15:0, and iso-C16:0. The polar lipids were diphosphatidylglycerol (DPG), phosphatidylglycerol (PG), phosphatidylinositol (PI), unidentified glycolipid (GL), two unidentified aminophospholipids (APLs), and three unidentified lipids (Ls). The peptidoglycan type was A3α. On the basis of phenotypic, phylogenetic, genotypic, and chemotaxonomic characteristics, strain DCT-5T represents a novel species of the genus Arthrobacter, for which the name Arthrobacter dokdonellae sp. nov. is proposed. The type strain is DCT-5T (= KCTC 49189T = LMG 31284T).

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Paraburkholderia dokdonella sp. nov., isolated from a plant from the genus Campanula: Man-Young Jung , Myung-Suk Kang , Ki-Eun Lee , Eun-Young Lee , Soo-Je Park; J. Microbiol. 2019;57(2):107-112. Published online November 19, 2018; DOI: https://doi.org/10.1007/s12275-019-8500-5

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Abstract

The novel Gram-stain-negative, rod-shaped, aerobic bacterial strain DCR-13T was isolated from a native plant belonging to the genus Campanula on Dokdo, an island in the Republic of Korea. Comparative analysis of the 16S rRNA gene sequence indicated that this strain is closely related to Paraburkholderia peleae PP52-1T (98.43% 16S rRNA gene sequence similarity), Paraburkholderia oxyphila NBRC 105797T (98.42%), Paraburkholderia sacchari IPT 101T (98.28%), Paraburkholderia mimosarum NBRC 106338T (97.80%), Paraburkholderia denitrificans KIS30-44T (97.46%), and Paraburkholderia paradise WAT (97.45%). This analysis of the 16S rRNA gene sequence also suggested that DCR-13T and the six closely related strains formed a clade within the genus Paraburkholderia, but that DCR-13T was clearly separated from the established species. DCR-13T had ubiquinone 8 as its predominant respiratory quinone, and its genomic DNA G + C content was 63.9 mol%. The isolated strain grew at a pH of 6.0–8.0 (with an optimal pH of 6.5), 0–4% w/v NaCl (with an optimal level of 0%), and a temperature of 18–42°C (with an optimal temperature of 30°C). The predominant fatty acids were C16:0, summed feature 8 (C18:1 ω7c/C18:1 ω6c), C17:0 cyclo, C19:0 cyclo ω8c, summed feature 3 (C16:1 ω6c/C16:1 ω7c) and summed feature 2 (C12:0 aldehyde), and the major polar lipids were phosphatidylglycerol and phosphatidylethanolamine. On the basis of polyphasic evidence, it is proposed that strain DCR-13T (= KCTC 62811T = LMG 30889T) represents the type strain of a novel species, Paraburkholderia dokdonella sp. nov.

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Paenibacillus seodonensis sp. nov., isolated from a plant of the genus Campanula: Myung-Suk Kang , Ki-Eun Lee , Eun-Young Lee , Soo-Je Park; J. Microbiol. 2018;56(12):874-879. Published online October 25, 2018; DOI: https://doi.org/10.1007/s12275-018-8455-y

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Abstract

Strain DCT-19T, representing a Gram-stain-positive, rodshaped, aerobic bacterium, was isolated from a native plant belonging to the genus Campanula on Dokdo, the Republic of Korea. Comparative analysis of the 16S rRNA gene sequence showed that this strain was closely related to Paenibacillus amylolyticus NRRL NRS-290T (98.6%, 16S rRNA gene sequence similarity), Paenibacillus tundrae A10bT (98.1%), and Paenibacillus xylanexedens NRRL B-51090T (97.6%). DNADNA hybridization indicated that this strain had relatively low levels of DNA-DNA relatedness with P. amylolyticus NRRL NRS-290T (30.0%), P. xylanexedens NRRL B-51090T (29.0%), and P. tundrae A10bT (24.5%). Additionally, the genomic DNA G + C content of DCT-19T was 44.8%. The isolated strain grew at pH 6.0–8.0 (optimum, pH 7.0), 0–4% (w/v) NaCl (optimum, 0%), and a temperature of 15–45°C (optimum 25–30°C). The sole respiratory quinone in the strain was menaquinone-7, and the predominant fatty acids were C15:0 anteiso, C16:0 iso, and C16:0. In addition, the major polar lipids were diphosphatidylglycerol and phosphatidylethanolamine. Based on its phenotypic properties, genotypic distinctiveness, and chemotaxonomic features, strain DCT-19T is proposed as a novel species in the genus Paenibacillus, for which the name Paenibacillus seodonensis sp. nov. is proposed (=KCTC 43009T =LMG 30888T). The type strain of Paenibacillus seodonensis is DCT-19T.

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Molecular Evidence of Crosstalk Between Bacterial Endophytes and Plant Transcriptome in Brassica juncea
Garima Sharma, Pooja Gokhale Sinha, Vartika Mathur
Journal of Plant Growth Regulation.2024; 43(12): 4397. CrossRef

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