Search for endophytic diazotrophs in barley seeds

Braz J Microbiol. 2014 Aug 29;45(2):621-5. doi: 10.1590/s1517-83822014000200033. eCollection 2014.

Abstract

Eight endophytic isolates assigned to Pseudomonas, Azospirillum, and Bacillus genera according to pheno-genotypic features were retrieved from barley seeds under selective pressure for nitrogen-fixers. Genetic relationships among related isolates were investigated through RAPD. Six isolates displayed nitrogen-fixing ability, while all could biosynthesize indolacetic acid in vitro and showed no antibiosis effects against Azospirillum brasilense Az39, a recognized PGPR.

Keywords: Azospirillum; Bacillus; PGPR; Pseudomonas; RAPD.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antibiosis
  • Azospirillum brasilense / classification
  • Azospirillum brasilense / genetics
  • Azospirillum brasilense / isolation & purification*
  • Azospirillum brasilense / metabolism
  • Bacillus / classification
  • Bacillus / genetics
  • Bacillus / isolation & purification*
  • Bacillus / metabolism
  • DNA, Bacterial / chemistry
  • DNA, Bacterial / genetics
  • DNA, Ribosomal / chemistry
  • DNA, Ribosomal / genetics
  • Endophytes / classification
  • Endophytes / genetics
  • Endophytes / isolation & purification*
  • Endophytes / metabolism
  • Hordeum / microbiology*
  • Indoleacetic Acids / metabolism
  • Molecular Typing
  • Nitrogen Fixation*
  • Pseudomonas / classification
  • Pseudomonas / genetics
  • Pseudomonas / isolation & purification*
  • Pseudomonas / metabolism
  • RNA, Ribosomal, 16S / genetics
  • Random Amplified Polymorphic DNA Technique
  • Seeds / microbiology*
  • Sequence Analysis, DNA

Substances

  • DNA, Bacterial
  • DNA, Ribosomal
  • Indoleacetic Acids
  • RNA, Ribosomal, 16S
  • indoleacetic acid