Abstract
Ancylobacter pratisalsi sp. nov. strain E130T is a Gram-negative, nonmotile, aerobic, and rod-shaped bacterium that was recently isolated from the rhizosphere of Plantago winteri Wirtg. from a natural salt meadow. This strain was described as novel species in genus Ancylobacter; however, information about its complete genome has yet not been reported. In this study, its genome was completely sequenced by PacBio SMRT cell platform, analyzed, and compared with other selected complete genome sequences of Ancylobacter to elucidate its potential plant growth promotion abilities. The genomic analysis revealed that the genome of strain E130T consists of one circular DNA chromosome of 4,618,530 bp with a GC content of 66% and one plasmid of 159,741 bp with a GC content of 64.13%. The entire genome contains 4,322 predicted coding genes, 49 transfer RNAs, and 6 ribosomal RNA genes. Genome analysis identified a siderophore natural product biosynthesis cluster, which produces fuscachelin. Knockout of several key genes in this cluster significantly reduces the plant-growth-promotion ability of the strain E130T. In addition to plant-growth promotion, the strain E130T can grow well on 5% NaCl (wt/vol), indicating that this strain is a potential bioresource for successful production of economic crops in alkaline soil.
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