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Microbial Megaplasmids pp 119–132Cite as

The Megaplasmid pNGR234a of Rhizobium sp. Strain NGR234

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Part of the book series: Microbiology Monographs ((MICROMONO,volume 11))

Abstract

The symbiotic megaplasmid or pNGR234a of Rhizobium sp. NGR234 was the first rhizobial replicon to be sequenced. The circular replicon is 536,165 base pairs long and contains most loci involved in plant nodulation (nod) and nitrogen fixation (nif, fix). pNGR234a carries also genes enconding a type III secretion system and many repeated DNA sequences that participate in genomic rearrangement. This chapter focuses on the biology and genetics of pNGR234a, highlighting its contribution to the broad-host-range phenotype of Rhizobium sp. NGR234 strain.

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  1. Ecologie Microbienne, and IFR 41, Université de Lyon, Université Lyon 1, CNRS, UMR 5557, F-69622, Villeurbanne, F-69622, France

    Patrick Mavingui

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  1. Institut fuer Biologie, Mikrobiologie, Humboldt-Universität zu Berlin, Chausseestr. 117, Berlin, 10115, Germany

    Edward Schwartz

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Mavingui, P. (2009). The Megaplasmid pNGR234a of Rhizobium sp. Strain NGR234. In: Schwartz, E. (eds) Microbial Megaplasmids. Microbiology Monographs, vol 11. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-85467-8_5

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