Environmental distribution and genomic characteristics of , with proposal of two novel species.

spp. were abundant in soil samples collected from deserts and other areas with high UV radiation. In addition, a novel species, with strain CPCC 204708 as the type, was isolated and identified from sandy soil sample collected from the Badain Jaran Desert of the Inner Mongolia autonomous region. Strain CPCC 204708 was Gram-stain positive, rod-shaped, non-motile, non-spore-forming, and grew optimally at 28-30°C, pH 7.0-8.0, and in the absence of NaCl. Analysis of the 16S rRNA gene sequence of strain CPCC 204708 showed its identity within the genus , with highest nucleotide similarities (97.4-98.2%) to other named species. Phylogenetic and genomic analyses indicated that the strain was most closely related to KCTC 29190, while represented a distinct species, as confirmed from physiological properties and comparison. The name sp. nov. was consequently proposed, with CPCC 204708 (= DSM 105495 = NBRC 112942) as the type strain. Genomic analyses of the spp. also suggested that sp. URHD0082 represents a novel species, for which the name "Solirubrobacter pratensis" sp. nov. was proposed. Genomic analysis of CPCC 204708 revealed the presence of genes related to its adaptation to the harsh environments of deserts and may also harbor genes functional in plant-microbe interactions. Pan-genomic analysis of available spp. confirmed the presence of many of the above genes as core components of genomes and suggests they may possess beneficial potential for their associate plant and may be important resources for bioactive compounds.