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Genetic diversity and growth promoting characteristics of diazotrophic bacteria isolated from 20 genotypes of Brachiaria spp

Background and aims Diazotrophic bacteria, including those of the genus Azospirillum and Nitrospirillum , colonize Brachiaria genotypes and contribute to plant development through nitrogen fixation, production of phytohormones and bioavailability of nutrients. This study aimed to determine the phylo... Full description

Journal Title: Plant and soil 2019, Vol.451 (1-2), p.187-205
Main Author: Ribeiro, Nathália Virgínia da Silva
Other Authors: Vidal, Márcia Soares , Barrios, Sanzio Carvalho Lima , Baldani, Vera Lúcia Divan , Baldani, José Ivo
Format: Electronic Article Electronic Article
Language: English
Subjects:
RNA
Publisher: Cham: Springer International Publishing
ID: ISSN: 0032-079X
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recordid: cdi_springer_journals_10_1007_s11104_019_04263_y
title: Genetic diversity and growth promoting characteristics of diazotrophic bacteria isolated from 20 genotypes of Brachiaria spp
format: Article
creator:
  • Ribeiro, Nathália Virgínia da Silva
  • Vidal, Márcia Soares
  • Barrios, Sanzio Carvalho Lima
  • Baldani, Vera Lúcia Divan
  • Baldani, José Ivo
subjects:
  • Analysis
  • Bacteria
  • Bacterial genetics
  • Bioavailability
  • Biodiversity
  • Biological diversity
  • Biomedical and Life Sciences
  • Brachiaria
  • Cellulose
  • Correlation analysis
  • Ecology
  • Fertilizers
  • Fixation
  • Genetic diversity
  • Genetic research
  • Genotype
  • Genotypes
  • Gibberellins
  • Growth
  • Inoculation
  • Life Sciences
  • NifH gene
  • Nitrogen
  • Nitrogen fixation
  • Nitrogenation
  • Nutrients
  • Phosphates
  • Phylogeny
  • Plant Physiology
  • Plant Sciences
  • Polysaccharides
  • Regular Article
  • Rhizosphere
  • RNA
  • rRNA 16S
  • Semisolids
  • Siderophores
  • Soil Science & Conservation
  • Soils
  • Species diversity
  • Zinc
ispartof: Plant and soil, 2019, Vol.451 (1-2), p.187-205
description: Background and aims Diazotrophic bacteria, including those of the genus Azospirillum and Nitrospirillum , colonize Brachiaria genotypes and contribute to plant development through nitrogen fixation, production of phytohormones and bioavailability of nutrients. This study aimed to determine the phylogenetic positioning and evaluate the functional abilities of diazotrophic bacteria isolated from Brachiaria genotypes. Methods Diazotrophic bacterial counting and isolation were carried out with rhizosphere soil and root samples from 20 Brachiaria genotypes after inoculation in nitrogen-free semi-solid NFb and LGI media. The isolates were analyzed using 16S rRNA and nif H sequences, and tested for their functional abilities to produce auxin and siderophores, to solubilize phosphate and zinc, and to degrade cellulose. Results The diazotrophic population ranged from 10 2 to 10 8  g −1 rhizosphere soil or roots. Sequencing of 16S rRNA from 213 isolates confirmed the presence of genera Azospirillum and Nitrospirillum , and revealed the presence of 14 other diazotrophic genera. The genus Nitrospirillum was detected colonizing all niches of most Brachiaria species. A PCA analysis showed a positive correlation between the ability to produce siderophores with the ability to produce IAA; and between phosphate and zinc solubilisation. Conclusions The results showed a high diversity of diazotrophic bacterial species colonizing 20 Brachiaria genotypes and revealed the presence of bacteria with variable growth-promoting characteristics, highlighting their potential as good candidates for the development of biofertilizers.
language: eng
source:
identifier: ISSN: 0032-079X
fulltext: no_fulltext
issn:
  • 0032-079X
  • 1573-5036
url: Link


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titleGenetic diversity and growth promoting characteristics of diazotrophic bacteria isolated from 20 genotypes of Brachiaria spp
creatorRibeiro, Nathália Virgínia da Silva ; Vidal, Márcia Soares ; Barrios, Sanzio Carvalho Lima ; Baldani, Vera Lúcia Divan ; Baldani, José Ivo
creatorcontribRibeiro, Nathália Virgínia da Silva ; Vidal, Márcia Soares ; Barrios, Sanzio Carvalho Lima ; Baldani, Vera Lúcia Divan ; Baldani, José Ivo
descriptionBackground and aims Diazotrophic bacteria, including those of the genus Azospirillum and Nitrospirillum , colonize Brachiaria genotypes and contribute to plant development through nitrogen fixation, production of phytohormones and bioavailability of nutrients. This study aimed to determine the phylogenetic positioning and evaluate the functional abilities of diazotrophic bacteria isolated from Brachiaria genotypes. Methods Diazotrophic bacterial counting and isolation were carried out with rhizosphere soil and root samples from 20 Brachiaria genotypes after inoculation in nitrogen-free semi-solid NFb and LGI media. The isolates were analyzed using 16S rRNA and nif H sequences, and tested for their functional abilities to produce auxin and siderophores, to solubilize phosphate and zinc, and to degrade cellulose. Results The diazotrophic population ranged from 10 2 to 10 8  g −1 rhizosphere soil or roots. Sequencing of 16S rRNA from 213 isolates confirmed the presence of genera Azospirillum and Nitrospirillum , and revealed the presence of 14 other diazotrophic genera. The genus Nitrospirillum was detected colonizing all niches of most Brachiaria species. A PCA analysis showed a positive correlation between the ability to produce siderophores with the ability to produce IAA; and between phosphate and zinc solubilisation. Conclusions The results showed a high diversity of diazotrophic bacterial species colonizing 20 Brachiaria genotypes and revealed the presence of bacteria with variable growth-promoting characteristics, highlighting their potential as good candidates for the development of biofertilizers.
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subjectAnalysis ; Bacteria ; Bacterial genetics ; Bioavailability ; Biodiversity ; Biological diversity ; Biomedical and Life Sciences ; Brachiaria ; Cellulose ; Correlation analysis ; Ecology ; Fertilizers ; Fixation ; Genetic diversity ; Genetic research ; Genotype ; Genotypes ; Gibberellins ; Growth ; Inoculation ; Life Sciences ; NifH gene ; Nitrogen ; Nitrogen fixation ; Nitrogenation ; Nutrients ; Phosphates ; Phylogeny ; Plant Physiology ; Plant Sciences ; Polysaccharides ; Regular Article ; Rhizosphere ; RNA ; rRNA 16S ; Semisolids ; Siderophores ; Soil Science & Conservation ; Soils ; Species diversity ; Zinc
ispartofPlant and soil, 2019, Vol.451 (1-2), p.187-205
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descriptionBackground and aims Diazotrophic bacteria, including those of the genus Azospirillum and Nitrospirillum , colonize Brachiaria genotypes and contribute to plant development through nitrogen fixation, production of phytohormones and bioavailability of nutrients. This study aimed to determine the phylogenetic positioning and evaluate the functional abilities of diazotrophic bacteria isolated from Brachiaria genotypes. Methods Diazotrophic bacterial counting and isolation were carried out with rhizosphere soil and root samples from 20 Brachiaria genotypes after inoculation in nitrogen-free semi-solid NFb and LGI media. The isolates were analyzed using 16S rRNA and nif H sequences, and tested for their functional abilities to produce auxin and siderophores, to solubilize phosphate and zinc, and to degrade cellulose. Results The diazotrophic population ranged from 10 2 to 10 8  g −1 rhizosphere soil or roots. Sequencing of 16S rRNA from 213 isolates confirmed the presence of genera Azospirillum and Nitrospirillum , and revealed the presence of 14 other diazotrophic genera. The genus Nitrospirillum was detected colonizing all niches of most Brachiaria species. A PCA analysis showed a positive correlation between the ability to produce siderophores with the ability to produce IAA; and between phosphate and zinc solubilisation. Conclusions The results showed a high diversity of diazotrophic bacterial species colonizing 20 Brachiaria genotypes and revealed the presence of bacteria with variable growth-promoting characteristics, highlighting their potential as good candidates for the development of biofertilizers.
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2Bacterial genetics
3Bioavailability
4Biodiversity
5Biological diversity
6Biomedical and Life Sciences
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8Cellulose
9Correlation analysis
10Ecology
11Fertilizers
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14Genetic research
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18Growth
19Inoculation
20Life Sciences
21NifH gene
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23Nitrogen fixation
24Nitrogenation
25Nutrients
26Phosphates
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30Polysaccharides
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33RNA
34rRNA 16S
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titleGenetic diversity and growth promoting characteristics of diazotrophic bacteria isolated from 20 genotypes of Brachiaria spp
authorRibeiro, Nathália Virgínia da Silva ; Vidal, Márcia Soares ; Barrios, Sanzio Carvalho Lima ; Baldani, Vera Lúcia Divan ; Baldani, José Ivo
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date2019-08-27
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abstractBackground and aims Diazotrophic bacteria, including those of the genus Azospirillum and Nitrospirillum , colonize Brachiaria genotypes and contribute to plant development through nitrogen fixation, production of phytohormones and bioavailability of nutrients. This study aimed to determine the phylogenetic positioning and evaluate the functional abilities of diazotrophic bacteria isolated from Brachiaria genotypes. Methods Diazotrophic bacterial counting and isolation were carried out with rhizosphere soil and root samples from 20 Brachiaria genotypes after inoculation in nitrogen-free semi-solid NFb and LGI media. The isolates were analyzed using 16S rRNA and nif H sequences, and tested for their functional abilities to produce auxin and siderophores, to solubilize phosphate and zinc, and to degrade cellulose. Results The diazotrophic population ranged from 10 2 to 10 8  g −1 rhizosphere soil or roots. Sequencing of 16S rRNA from 213 isolates confirmed the presence of genera Azospirillum and Nitrospirillum , and revealed the presence of 14 other diazotrophic genera. The genus Nitrospirillum was detected colonizing all niches of most Brachiaria species. A PCA analysis showed a positive correlation between the ability to produce siderophores with the ability to produce IAA; and between phosphate and zinc solubilisation. Conclusions The results showed a high diversity of diazotrophic bacterial species colonizing 20 Brachiaria genotypes and revealed the presence of bacteria with variable growth-promoting characteristics, highlighting their potential as good candidates for the development of biofertilizers.
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doi10.1007/s11104-019-04263-y