Abstract
Mesorhizobium loti is a collective name for mesorhizobial species that establish nitrogen-fixing symbiosis with Lotus species. Accumulating genetic and genomic data indicate that diverse strains of M. loti have been generated through lateral integration of symbiosis islands into core chromosomes of a range of bacteria. The M. loti symbiosis islands probably derived from a common ancestral island and are evolving by acquiring accessory genetic elements while maintaining gene sets essential for nodulation and nitrogen fixation together with genes for some supportive processes. This view was supported by preliminary mappings of next-generation sequencing data of three strains, R7A, NZP2037, and NZP2213, on the whole-genome sequence of the strain MAFF303099. Common properties of M. loti genes involved in symbiosis and their regulation are also described along with genetic resources to study M. loti.
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Saeki, K., Ronson, C.W. (2014). Genome Sequence and Gene Functions in Mesorhizobium loti and Relatives. In: Tabata, S., Stougaard, J. (eds) The Lotus japonicus Genome. Compendium of Plant Genomes. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-44270-8_5
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