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<p>A Gram-stain-negative, rod-shaped, strictly aerobic bacterium strain SG148<sup>T</sup>, within the family <i>Rhizobiaceae</i>, was isolated from rice leaves collected in Fujian Province, China. Phylogenetic analysis utilizing 16S rRNA gene sequences revealed that strain SG148<sup>T</sup> displayed a high sequence similarity of 95.2–95.8% to the strains of closely related species of <i>Shinella</i> and <i>Rhizobium</i>. The highest digital DNA–DNA hybridization (dDDH), core-proteome average amino acid identity (cpAAI), and average nucleotide identity (ANI) values between strain SG148<sup>T</sup> and related strains were estimated as 20.7%, 79.3%, and 73.7%, respectively. The predominant respiratory quinones in strain SG148<sup>T</sup> were identified as Q-9 and Q-10, while major polar lipids included diphosphatidylglycerol, phosphatidylcholine, phosphatidylglycerol, and phosphatidylethanolamine. Additionally, strain SG148<sup>T</sup> was capable of phosphate-solubilizing and siderophore-producing carrier, significantly promoting rice seedling growth. The DNA G + C content was determined to be 56.1%. Given its distinct phylogenetic and phenotypic characteristics, strain SG148<sup>T</sup> is considered to represent a novel genus, for which the name <i>Oryzifoliimicrobium ureilyticus</i> gen. nov., sp. nov. is proposed. The type strain is SG148<sup>T</sup> (= MCCC 1K08901<sup>T</sup> = KCTC 8337<sup>T</sup>).</p>

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Oryzifoliimicrobium ureilyticus gen. nov., sp. nov., a Novel Phosphate-Solubilizing and Siderophore-Producing Bacterium Within the Family Rhizobiaceae

  • 期刊论文

  • 发表日期：

    2025年7月24日

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  • Guo-Hong Liu,
  • Ling Yao,
  • Peng Gao,
  • Shu-Qun Zhang,
  • Bing Li,
  • Christopher Rensing,
  • Wen-Qing Li,
  • Shun-Gui Zhou

摘要

A Gram-stain-negative, rod-shaped, strictly aerobic bacterium strain SG148T, within the family Rhizobiaceae, was isolated from rice leaves collected in Fujian Province, China. Phylogenetic analysis utilizing 16S rRNA gene sequences revealed that strain SG148T displayed a high sequence similarity of 95.2–95.8% to the strains of closely related species of Shinella and Rhizobium. The highest digital DNA–DNA hybridization (dDDH), core-proteome average amino acid identity (cpAAI), and average nucleotide identity (ANI) values between strain SG148T and related strains were estimated as 20.7%, 79.3%, and 73.7%, respectively. The predominant respiratory quinones in strain SG148T were identified as Q-9 and Q-10, while major polar lipids included diphosphatidylglycerol, phosphatidylcholine, phosphatidylglycerol, and phosphatidylethanolamine. Additionally, strain SG148T was capable of phosphate-solubilizing and siderophore-producing carrier, significantly promoting rice seedling growth. The DNA G + C content was determined to be 56.1%. Given its distinct phylogenetic and phenotypic characteristics, strain SG148T is considered to represent a novel genus, for which the name Oryzifoliimicrobium ureilyticus gen. nov., sp. nov. is proposed. The type strain is SG148T (= MCCC 1K08901T = KCTC 8337T).