Molecular phylogenetic and biogeochemical studies of sulfate-reducing bacteria in the rhizosphere of Spartina alterniflora
Article Abstract:
The molecular phylogenetics and biogeochemistry of sulfate-reducing bacteria in the rhizosphere of the marsh grass Spartina alterniflora were investigated over two growing seasons using molecular probing, enumerations of culturable sulfate-reducing bacteria and measurements of SO(sub 4)(super 2-) reduction rates and geochemical variables. SO(sub 4)(super 2-) reduction rates increased dramatically when plant growth commenced in April and decreased when plants flowered in late July. It was also shown that sulfate-reducing bacteria ribosomal RNA made up as high as 43% of the ribosomal RNA from members of the domain Bacteria in marsh sediments, with the highest percentages found in bacteria that are physically related to root surfaces.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1999
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Seasonal changes ion the relative abundance of uncultivated sulfate-reducing bacteria in a salt marsh sediment and in the rhizosphere of Spartina alterniflora
Article Abstract:
A study was conducted on the community composition and phylogenetic diversity in the rhizosphere of Spartina alterniflora and in a salt marsh sediment. Oligonucleotide probes were developed to examine the novel phylotypes taken from rhizosphere samples. Results show that target organisms influence salt marsh sediment and Spartina rhizosphere. Interaction between Spartina alterniflora and A01 was also observed.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1997
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Recovery and phylogenetic analysis of nifH sequences from diazotrophic bacteria associated with dead aboveground biomass of Spartina alterniflora
Article Abstract:
Bacteria isolated from dead Spartina alterniflora plants included alpha-Proteobacteria, gamma-Proteobacteria, and anaerobic diazotrophs. Four sequences from the alpha-Proteobacteria were over 99% homologous to Azospirillum brasilense.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 2001
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