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Genome sequence of Ensifer medicae strain WSM1115; an acid-tolerant Medicago-nodulating microsymbiont from Samothraki,Greece
Authors:Wayne Reeve  Ross Ballard  John Howieson  Elizabeth Drew  Rui Tian  Lambert Br?u  Christine Munk  Karen Davenport  Patrick Chain  Lynne Goodwin  Ioanna Pagani  Marcel Huntemann  Konstantinos Mavrommatis  Amrita Pati  Victor Markowitz  Natalia Ivanova  Tanja Woyke  Nikos Kyrpides
Abstract:Ensifer medicae strain WSM1115 forms effective nitrogen fixing symbioses with a range of annual Medicago species and is used in commercial inoculants in Australia. WSM1115 is an aerobic, motile, Gram-negative, non-spore-forming rod. It was isolated from a nodule recovered from the root of burr medic (Medicago polymorpha) collected on the Greek Island of Samothraki. WSM1115 has a broad host range for nodulation and N2 fixation capacity within the genus Medicago, although this does not extend to all medic species. WSM1115 is considered saprophytically competent in moderately acid soils (pH(CaCl2) 5.0), but it has failed to persist at field sites where soil salinity exceeded 10 ECe (dS/m). Here we describe the features of E. medicae strain WSM1115, together with genome sequence information and its annotation. The 6,861,065 bp high-quality-draft genome is arranged into 7 scaffolds of 28 contigs, contains 6,789 protein-coding genes and 83 RNA-only encoding genes, and is one of 100 rhizobial genomes sequenced as part of the DOE Joint Genome Institute 2010 Genomic Encyclopedia for Bacteria and Archaea-Root Nodule Bacteria (GEBA-RNB) project.
Keywords:root-nodule bacteria  nitrogen fixation  rhizobia  Alphaproteobacteria
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