Plasmid content of salt stress-tolerant Rhizobium strains from Egyptian soils nodulating common bean (Phaseolus vulgaris L.)

Abdelaal Shamseldin

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Plasmid profile analysis is useful to characterize Rhizobium strains within the same species. Among the 16 Rhizobium strains examined, 14 had distinct plasmid profiles. The size of plasmids ranged from 40 to 650 kb, and three plasmids of 650, 510 and 390 kb were common to several strains. Plasmid analysis revealed that Rhizobium etli contained a mega-plasmid, similar in size to Rhizobium tropici. All the salt-tolerant strains examined had a plasmid of 250 kb, except for strain EBRI 29. This suggests that this plasmid may play an important adaptive role under salt stress conditions.

Original languageEnglish (US)
Pages (from-to)1603-1606
Number of pages4
JournalWorld Journal of Microbiology and Biotechnology
Volume24
Issue number8
DOIs
StatePublished - Aug 2008

Keywords

  • Common bean
  • Plasmid DNA
  • Rhizobium
  • Salt stress

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