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
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Research Support, Non-U.S. Gov't
MeSH terms
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Antibiosis
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Azospirillum brasilense / classification
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Azospirillum brasilense / genetics
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Azospirillum brasilense / isolation & purification*
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Azospirillum brasilense / metabolism
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Bacillus / classification
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Bacillus / genetics
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Bacillus / isolation & purification*
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Bacillus / metabolism
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DNA, Bacterial / chemistry
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DNA, Bacterial / genetics
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DNA, Ribosomal / chemistry
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DNA, Ribosomal / genetics
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Endophytes / classification
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Endophytes / genetics
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Endophytes / isolation & purification*
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Endophytes / metabolism
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Hordeum / microbiology*
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Indoleacetic Acids / metabolism
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Molecular Typing
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Nitrogen Fixation*
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Pseudomonas / classification
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Pseudomonas / genetics
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Pseudomonas / isolation & purification*
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Pseudomonas / metabolism
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RNA, Ribosomal, 16S / genetics
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Random Amplified Polymorphic DNA Technique
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Seeds / microbiology*
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Sequence Analysis, DNA
Substances
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DNA, Bacterial
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DNA, Ribosomal
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Indoleacetic Acids
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RNA, Ribosomal, 16S
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indoleacetic acid