Phenotypic and Genomic Characterization of sp. nov., a Novel Species with Promising Features as a Potential Plant Growth-Promoting and Biocontrol Agent.

Plant growth-promoting rhizobacterial strain FP607 was isolated from the rhizosphere of beets in Wuhan, China. Strain FP607 exhibited significant antagonism toward several phytopathogenic bacteria, indicating that FP607 may produce antimicrobial metabolites and has a stronger biocontrol efficacy against plant pathogens. Growth-promoting tests showed that FP607 produced indole-3-acetic acid (IAA), NH, and ferritin. The genome sequence of strain FP607 was 6,590,972 bp long with 59.0% G + C content. The optimum temperature range was 25-30 °C, and the optimum pH was 7. The cells of strain FP607 were Gram-negative, short, and rod-shaped, with polar flagella. The colonies on the King's B (KB) agar plates were light yellow, smooth, and circular, with regular edges. A phylogenetic analysis of the 16S rRNA sequence and a multilocus sequence analysis (MLSA) showed that strain FP607 was most closely related to the type of strain SWRI79. Based on a polyphasic taxonomic approach, strain FP607 was identified as a novel species within the genus , for which the name sp. nov. was proposed. The type of strain used was FP607 (JCM 35688, CGMCC 27743, and ACCC 62446).