Phylogenetic Analysis of Partial Bacterial 16S rDNA Sequences of Tropical Grass Pasture Soil under Acacia tortilis subsp. raddiana in Senegal

We used direct recovery of bacterial 16S rRNA gene sequences to investigate the bacterial diversity under Acacia tortilis subsp. raddiana, a legume tree naturally growing in the dry land part of Senegal (West Africa). Microbial DNA was purified directly from soil samples and subjected to PCR with pr...

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Veröffentlicht in:Systematic and applied microbiology 2004-03, Vol.27 (2), p.238-252
Hauptverfasser: Diallo, Moudjahidou Demba, Martens, Miet, Vloemans, Nele, Cousin, Sylvie, Vandekerckhove, Tom T.M., Neyra, Marc, de Lajudie, Philippe, Willems, Anne, Gillis, Monique, Vyverman, Wim, Van der Gucht, Katleen
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container_issue 2
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container_title Systematic and applied microbiology
container_volume 27
creator Diallo, Moudjahidou Demba
Martens, Miet
Vloemans, Nele
Cousin, Sylvie
Vandekerckhove, Tom T.M.
Neyra, Marc
de Lajudie, Philippe
Willems, Anne
Gillis, Monique
Vyverman, Wim
Van der Gucht, Katleen
description We used direct recovery of bacterial 16S rRNA gene sequences to investigate the bacterial diversity under Acacia tortilis subsp. raddiana, a legume tree naturally growing in the dry land part of Senegal (West Africa). Microbial DNA was purified directly from soil samples and subjected to PCR with primers specific for bacterial 16S rRNA gene sequences. 16S rDNA clone libraries were constructed from two soil samples taken at two dates, i.e. June 25 th 1999 (dry season) and August 28 th 1999 (rainy season) at depths of 0.25–0.50 m and at 3 m distance from the stem. The 16S rDNA of 117 clones was partially sequenced. Phylogenetic analysis of these sequences revealed extensive diversity (100 phylotypes). Comparative sequence analysis of these clones identified members of the Gammaproteobacteria (35% of the phylotypes) as the most important group, followed by the Firmicutes division with 24%. Alphaproteobacteria, Betaproteobacteria, Acidobacteria and Actinobacteria were found to be less represented. Our data suggest that bacterial communities under Acacia tortilis subsp. raddiana might differ according to the season. The relative compositions of the populations is different in both samples: the Acidobacteria are present in a much higher percentage in the dry season than in the rainy season sample while the inverse effect is observed for the members of the other groups. Within the Gammaproteobacteria we found a shift between the dry season and the rainy season from pseudomonads to Acinetobacter and Escherichia related organisms.
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Within the Gammaproteobacteria we found a shift between the dry season and the rainy season from pseudomonads to Acinetobacter and Escherichia related organisms.</description><subject>16S ribosomal RNA</subject><subject>Acacia</subject><subject>Acacia - microbiology</subject><subject>Acacia tortilis</subject><subject>Acinetobacter</subject><subject>Actinobacteria</subject><subject>Actinobacteria - genetics</subject><subject>Bacterial diversity</subject><subject>Bacteriology</subject><subject>Base Sequence</subject><subject>Biological and medical sciences</subject><subject>clone library</subject><subject>Cloning, Molecular</subject><subject>DNA, Bacterial - chemistry</subject><subject>DNA, Bacterial - genetics</subject><subject>Electrophoresis, Polyacrylamide Gel</subject><subject>Escherichia coli</subject><subject>Firmicutes</subject><subject>Fundamental and applied biological sciences. 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ispartof Systematic and applied microbiology, 2004-03, Vol.27 (2), p.238-252
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source MEDLINE; Elsevier ScienceDirect Journals
subjects 16S ribosomal RNA
Acacia
Acacia - microbiology
Acacia tortilis
Acinetobacter
Actinobacteria
Actinobacteria - genetics
Bacterial diversity
Bacteriology
Base Sequence
Biological and medical sciences
clone library
Cloning, Molecular
DNA, Bacterial - chemistry
DNA, Bacterial - genetics
Electrophoresis, Polyacrylamide Gel
Escherichia coli
Firmicutes
Fundamental and applied biological sciences. Psychology
Microbiology
Miscellaneous
Molecular Sequence Data
Phylogeny
Polymerase Chain Reaction
Proteobacteria - genetics
RNA, Ribosomal, 16S - analysis
RNA, Ribosomal, 16S - chemistry
RNA, Ribosomal, 16S - genetics
Seasons
Senegal
Soil Microbiology
tropical soil
title Phylogenetic Analysis of Partial Bacterial 16S rDNA Sequences of Tropical Grass Pasture Soil under Acacia tortilis subsp. raddiana in Senegal
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