Open AccessDistribution of plasmids in cyanobacteria of the LPP group
Author(s) -
Potts Malcolm
Publication year - 1984
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.1984.tb01333.x
Subject(s) - plasmid , cyanobacteria , biology , homology (biology) , dna , genetics , strain (injury) , microbiology and biotechnology , bacteria , gene , anatomy
The distribution of plasmid DNA has been studied in 23 strains and variants of non‐heterocystous filamentous cyanobacteria that are susceptible to infection by the LPP‐1 cyanophage (archetype). 21 have identical plasmid profiles and contain 3 plasmids of M r s 0.9, 10 and approx. 12 · 10 6 respectively. In one strain, Plectonema FS180, the plasmids have been designated pMP1, pMP2, and pMP3, respectively. pMP1 shows sequence homology with pMP2 and pMP3 but not with DNA from an LPP‐type cyanophage. Plectonema UTEX 598 lacks the small plasmid only, while Plectonema UTEX 1541 is distinct amongst all these strains with 3 plasmids of M r s 3, 10, and > 30 · 10 6 , respectively. The findings support the view that the majority of these strains may be independent isolates of a single species.