TY - JOUR
T1 - Pseudomonas nunensis sp. nov. isolated from a suppressive potato field in Greenland
AU - Ntana, Fani
AU - Hennessy, Rosanna C.
AU - Zervas, Athanasios
AU - Stougaard, Peter
N1 - Publisher Copyright:
© 2023 The Authors.
PY - 2023/2
Y1 - 2023/2
N2 - The bacterial strain In5T was previously isolated from a suppressive potato field in southern Greenland and has been characterized and described as Pseudomonas fluorescens. However, the results of new polyphasic analyses coupled with those of phenotypic, phylogenetic and genomic analyses reported here demonstrate that the affiliation to the species P. fluorescens was incorrect. The strain is Gram-stain-negative, rod-shaped, aerobic and displays growth at 4–28 °C (optimum temperature 20–25 °C) and at pH 5–9 (optimum pH 6–7). Major fatty acids were C16: 0 (38.2 %), a summed feature consisting of C16: 1 ω6c and/or C16: 1 ω7c) (20.7 %), C17: 0 cyclo ω7c (14.3 %) and a summed feature consisting of C18: 1 ω6c and/or C18: 1 ω7c (11.7 %). The respiratory quinones were determined to be Q9 (95.5 %) and Q8 (4.5 %) and major polar lipids were phosphatidylethanolamine, phosphatidylglycerol and diphosphatidylglyc-erol. The DNA G+C content was determined to be 59.4 mol%. The results of phylogenetic analysis based on the 16S rRNA gene and multi-locus sequence analysis (MLSA; concatenated 16S rRNA, gyrB, rpoB and rpoD sequences) indicated that In5T was affiliated with the Pseudomonas mandelii subgroup within the genus Pseudomonas. Comparison of the genome sequence of In5T and those of related type strains of species of the genus Pseudomonas revealed an average nucleotide identity (ANI) of 87.7 % or less and digital DNA–DNA hybridization (dDDH) of less than 34.5 % relatedness, respectively. Two more strains, In614 and In655, isolated from the same suppressive soil were included in the genome analysis. The ANI and dDDH of In614 and In655 compared with In5T were ANI: 99.9 and 97.6 and dDDH (GGDC) 99.9 and 79.4, respectively, indicating that In5T, In614 and In655 are representatives of the same species. The results of the phenotypic, phylogenetic and genomic analyses support the hypothesis that strain In5T represents a novel species of the genus Pseudomonas, for which the name Pseudomonas nunensis sp. nov. is proposed. The type strain is In5T(=LMG 32653T=NCIMB 15428T).
AB - The bacterial strain In5T was previously isolated from a suppressive potato field in southern Greenland and has been characterized and described as Pseudomonas fluorescens. However, the results of new polyphasic analyses coupled with those of phenotypic, phylogenetic and genomic analyses reported here demonstrate that the affiliation to the species P. fluorescens was incorrect. The strain is Gram-stain-negative, rod-shaped, aerobic and displays growth at 4–28 °C (optimum temperature 20–25 °C) and at pH 5–9 (optimum pH 6–7). Major fatty acids were C16: 0 (38.2 %), a summed feature consisting of C16: 1 ω6c and/or C16: 1 ω7c) (20.7 %), C17: 0 cyclo ω7c (14.3 %) and a summed feature consisting of C18: 1 ω6c and/or C18: 1 ω7c (11.7 %). The respiratory quinones were determined to be Q9 (95.5 %) and Q8 (4.5 %) and major polar lipids were phosphatidylethanolamine, phosphatidylglycerol and diphosphatidylglyc-erol. The DNA G+C content was determined to be 59.4 mol%. The results of phylogenetic analysis based on the 16S rRNA gene and multi-locus sequence analysis (MLSA; concatenated 16S rRNA, gyrB, rpoB and rpoD sequences) indicated that In5T was affiliated with the Pseudomonas mandelii subgroup within the genus Pseudomonas. Comparison of the genome sequence of In5T and those of related type strains of species of the genus Pseudomonas revealed an average nucleotide identity (ANI) of 87.7 % or less and digital DNA–DNA hybridization (dDDH) of less than 34.5 % relatedness, respectively. Two more strains, In614 and In655, isolated from the same suppressive soil were included in the genome analysis. The ANI and dDDH of In614 and In655 compared with In5T were ANI: 99.9 and 97.6 and dDDH (GGDC) 99.9 and 79.4, respectively, indicating that In5T, In614 and In655 are representatives of the same species. The results of the phenotypic, phylogenetic and genomic analyses support the hypothesis that strain In5T represents a novel species of the genus Pseudomonas, for which the name Pseudomonas nunensis sp. nov. is proposed. The type strain is In5T(=LMG 32653T=NCIMB 15428T).
KW - antifungal
KW - biocontrol
KW - phylogenomics
KW - potato soil
KW - Pseudomonas mandelii subgroup
UR - http://www.scopus.com/inward/record.url?scp=85147573158&partnerID=8YFLogxK
U2 - 10.1099/ijsem.0.005700
DO - 10.1099/ijsem.0.005700
M3 - Journal article
C2 - 36749687
AN - SCOPUS:85147573158
SN - 1466-5026
VL - 73
JO - International Journal of Systematic and Evolutionary Microbiology
JF - International Journal of Systematic and Evolutionary Microbiology
IS - 2
M1 - 005700
ER -