title: Megaplasmids in the plant-associated bacteria Rhizobium meliloti and Pseudomonas solanacearum.
abstract: Using analytical and preparative methods, we demonstrated the presence of megaplasmids with molecular weight larger than 450 x 10(6) in the two plant-associated bacteria Rhizobium meliloti and Pseudomonas solanacearum. Such giant plasmids were found in 8 of 9 P. solanacearum strains tested and in all of the 18 R. meliloti strains tested.
mesh_terms: D004269:DNA, Bacterial; D004270:DNA, Circular; D008970:Molecular Weight; D010957:Plasmids; D011549:Pseudomonas / Q000235:genetics*; D012231:Rhizobium / Q000235:genetics*
chemical_list: D004269:DNA, Bacterial; D004270:DNA, Circular