Mesorhizobium camelthorni sp. nov., isolated from Alhagi sparsifolia

• Published in: International journal of systematic and evolutionary microbiology Vol. 61; no. Pt 3; pp. 574 - 579
• Main Authors: CHEN, Wei-Min, ZHU, Wen-Fei, BONTEMPS, Cyril, YOUNG, J. Peter W, WEI, Ge-Hong
• Format: Journal Article
• Language: English
• Published: Reading Society for General Microbiology 01.03.2011; Microbiology Society
• Subjects: Alphaproteobacteria - classification; Alphaproteobacteria - genetics; Alphaproteobacteria - isolation & purification; Bacterial Proteins - genetics; Bacterial Typing Techniques; Bacteriology; Biodiversity; Biological and medical sciences; Cluster Analysis; DNA, Bacterial - chemistry; DNA, Bacterial - genetics; DNA, Ribosomal - chemistry; DNA, Ribosomal - genetics; Fabaceae - microbiology; Fatty Acids - analysis; Fundamental and applied biological sciences. Psychology; Life Sciences; Microbiology; Microbiology and Parasitology; Molecular Sequence Data; Nucleic Acid Hybridization; Phylogeny; Plant Roots - microbiology; RNA, Ribosomal, 16S - genetics; Sequence Analysis, DNA; Systematics; Systematics, Phylogenetics and taxonomy; Xerophyte; Leguminosae; Taxonomy; Dicotyledones; Angiospermae; Perennial plant; Bacteria; Spermatophyta; New species
• ISSN: 1466-5026; 1466-5034
• DOI: 10.1099/ijs.0.022947-0

Nine strains isolated from symbiotic root nodules on Alhagi sparsifolia were previously designated as representing genospecies I. Phylogenetic analyses indicated that genospecies I was related closely to Mesorhizobium alhagi (genospecies II), and clearly formed a new lineage within the genus Mesorhizobium. In this study, we differentiated genospecies I from recognized species of the genus Mesorhizobium based on phylogenetic analyses of additional core genes (recA, glnA), levels of DNA-DNA relatedness (<43.3 %), fatty acid profile (58 % C₁₈:₁ω7c, 19 % 11-methyl C₁₈:₁ω7c), and biochemical and physiological characteristics. The nine strains are therefore considered to represent a novel species of the genus Mesorhizobium, for which the name Mesorhizobium camelthorni sp. nov. is proposed. The type strain is CCNWXJ 40-4(T) (=HAMBI 3020(T) =ACCC 14549(T)).