Strain KSNA2T, a Gram-negative, moderately halophilic, facultatively
anaerobic, motile, rod-shaped bacterium, was isolated
from the surface-sterilized stem tissue of a beach morning
glory (Calystegia soldanella) plant in Chuja Island, Jejudo,
Republic of Korea. Phylogenetic analysis based on 16S
rRNA gene and whole-genome sequences revealed that strain
KSNA2T formed a distinct lineage within the family Enterobacteriaceae,
with the highest 16S rRNA gene sequence similarity
to Izhakiella australiensis KCTC 72143T (96.2%) and
Izhakiella capsodis KCTC 72142T (96.0%), exhibited 95.5–
95.9% similarity to other genera in the family Enterobacteriaceae
and Erwiniaceae. Conserved signature indels analysis
elucidated that strain KSNA2T was delimited into family
Enterobacteriaceae. KSNA2T genome comprises a circular
chromosome of 5,182,800 bp with 56.1% G + C content. Digital
DNA-DNA relatedness levels between strain KSNA2T
and 18 closely related species were 19.3 to 21.1%. Average
nucleotide identity values were between 72.0 and 76.7%.
Growth of strain KSNA2T was observed at 4 to 45°C (optimum,
25°C) and pH 5.0 to 12.0 (optimum, pH 7.0) in the
presence of 0 to 11% (w/v) NaCl (optimum, 0–7%). The major
cellular fatty acids (> 10%) were C16:0 followed by summed
feature 8 (C18:1 ω7c and/or C18:1 ω6c), summed feature
3 (C16:1 ω7c and/or C16:1 ω6c), C17:0 cyclo, and C14:0. The major
isoprenoid quinone was ubiquinone-8 (Q-8). With combined
phylogenetic, genomic, phenotypic, and chemotaxonomic
features, strain KSNA2T represents a novel species of
a new genus in the family Enterobacteriaceae, for which the
name Jejubacter calystegiae gen. nov., sp. nov. is proposed.
The type strain is KSNA2T (= KCTC 72234T = CCTCC AB
2019098T).
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Strain ATSA2T was isolated from surface-sterilized kimchi
cabbage (Brassica rapa subsp. pekinensis) seeds and represents
a novel bacterium based on the polyphasic taxonomic
approach. A phylogenetic analysis based on 16S rRNA gene
sequences showed that strain ATSA2T formed a lineage within
genus Saccharibacillus and was most closely to Saccharibacillus
deserti WLG055T (98.1%) and Saccharibacillus qingshengii
H6T (97.9%). The whole-genome of ATSA2T comprised
a 5,619,468 bp of circular chromosome with 58.4% G + C
content. The DNA-DNA relatedness values between strain
ATSA2T and its closely related type strains S. deserti WLJ055T
and S. qingshengii H6T were 26.0% and 24.0%, respectively.
Multiple gene clusters associated with plant growth promotion
activities (stress response, nitrogen and phosphorus metabolism,
and auxin biosynthesis) were annotated in the
genome. Strain ATSA2T was Gram-positive, endospore-forming,
facultatively anaerobic, and rod-shaped. It grew at
15–37°C (optimum 25°C), pH 6.0–10.0 (optimum pH 8.0),
and in the presence of 0–5% (w/v) NaCl (optimum 1%). The
major cellular fatty acids (> 10%) of strain ATSA2T were anteiso-
C15:0 and C16:0. MK-7 was the major isoprenoid quinone.
The major polar lipids present were diphosphatidylglycerol,
phosphatidylglycerol, and three unknown glycolipids. Based
on its phylogenetic, genomic, phenotypic, and chemotaxonomic
features, strain ATSA2T is proposed to represent a
novel species of genus Saccharibacillus, for which the name is
Saccharibacillus brassicae sp. nov. The type strain is ATSA2T
(KCTC 43072T = CCTCC AB 2019223T).
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A strictly aerobic, motile, endospore-forming, rod-shaped
bacterium, designated HS21T, was isolated from rhizospheric
soil of the Korean fir tree (Abies koreana) from Halla mountain
on Jeju island, Korea. Growth of strain HS21T was observed
at pH 6.0–8.0 (optimum: pH 7.0), 0–2% (w/v) NaCl
and 4–30°C (optimum: 25°C). A comparative analysis of 16S
rRNA gene sequences showed that strain HS21T was most
closely related to Cohnella luojiensis HY-22RT (97.6%), followed
by C. lupini RLAHU4BT (97.4%) and C. collisoli NKM-
5T (97.2%). The genome of strain HS21T comprised a circular
chromosome of 7,059,027 bp with 44.8% G + C content. The
DNA-DNA relatedness values between strain HS21T and C.
luojiensis HY-22RT and C. lupini RLAHU4BT were 18.1% and
13.8%, respectively. The major cellular fatty acids (> 5%) of
the isolate were anteiso-C15:0, iso-C16:0, C16:0, and iso-C15:0. The
polar lipids present were diphosphatidylglycerol, phosphatidylglycerol,
phosphatidylethanolamine, lysylphosphatidylglycerol,
and three unidentified aminophospholipids. Based
on its phenotypic, phylogenetic, genomic, and chemotaxonomic
properties, strain HS21T represents a novel species of
the genus Cohnella, for which the name Cohnella abietis sp.
nov. is proposed. The type strain is HS21T (= KCTC 43028T
= CCTCC AB 2019010T).
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