Limits...
Successional Trajectories of Rhizosphere Bacterial Communities over Consecutive Seasons.

Shi S, Nuccio E, Herman DJ, Rijkers R, Estera K, Li J, da Rocha UN, He Z, Pett-Ridge J, Brodie EL, Zhou J, Firestone M - MBio (2015)

Bottom Line: Succession in the rhizosphere was characterized by a significant decrease in both taxonomic and phylogenetic diversity relative to background soil communities, driven by reductions in both richness and evenness of the bacterial communities.Plant roots selectively stimulated the relative abundance of Alphaproteobacteria, Betaproteobacteria, and Bacteroidetes but reduced the abundance of Acidobacteria, Actinobacteria, and Firmicutes.The reproducibility of rhizosphere succession and the apparent phylogenetic conservation of rhizosphere competence traits suggest adaptation of the indigenous bacterial community to this common grass over the many decades of its presence.

View Article: PubMed Central - PubMed

Affiliation: Department of Environmental Science, Policy and Management, University of California, Berkeley, California, USA Department of Microbiology and Plant Biology, Institute for Environmental Genomics, University of Oklahoma, Norman, Oklahoma, USA.

No MeSH data available.


Relative abundance of abundant soil microbial groups at the phylum level in preplanted and rhizosphere (a and c) and preplanted and bulk/residual (b and d) soils at different A. fatua growth stages as detected by Illumina sequencing of 16S rRNA gene amplicons. Data are presented as means ± standard errors (n = 16). *, P < 0.05, **, P < 0.01, ***, P < 0.001.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4526712&req=5

fig5: Relative abundance of abundant soil microbial groups at the phylum level in preplanted and rhizosphere (a and c) and preplanted and bulk/residual (b and d) soils at different A. fatua growth stages as detected by Illumina sequencing of 16S rRNA gene amplicons. Data are presented as means ± standard errors (n = 16). *, P < 0.05, **, P < 0.01, ***, P < 0.001.

Mentions: The relative abundances of several abundant bacterial phyla (classes for the Proteobacteria phylum) differed significantly between rhizosphere and bulk/residual soil communities. Proteobacteria (particularly Alphaproteobacteria, Betaproteobacteria, and Gammaproteobacteria) and Bacteroidetes became significantly enriched in the rhizosphere compared to the preplanted (week 0) soils (Fig. 5a and c). In contrast, the relative abundances of Actinobacteria, Acidobacteria, Firmicutes, Planctomycetes, Gemmatimonadetes, and Chloroflexi were significantly reduced in the rhizosphere compared to preplanted soil, and in general, their relative abundances decreased gradually over time (Fig. 5a and c). Generally, the patterns of bacterial responses to plant growth are consistent between two seasons. Compared to the rhizosphere communities, the relative abundances of commonly occurring bacterial groups in the bulk/residual soils remained relatively stable across sampling time points in both seasons, and in some cases, the direction of changes in relative phylum abundance was opposite that observed in the rhizosphere communities (Fig. 5b and d).


Successional Trajectories of Rhizosphere Bacterial Communities over Consecutive Seasons.

Shi S, Nuccio E, Herman DJ, Rijkers R, Estera K, Li J, da Rocha UN, He Z, Pett-Ridge J, Brodie EL, Zhou J, Firestone M - MBio (2015)

Relative abundance of abundant soil microbial groups at the phylum level in preplanted and rhizosphere (a and c) and preplanted and bulk/residual (b and d) soils at different A. fatua growth stages as detected by Illumina sequencing of 16S rRNA gene amplicons. Data are presented as means ± standard errors (n = 16). *, P < 0.05, **, P < 0.01, ***, P < 0.001.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4526712&req=5

fig5: Relative abundance of abundant soil microbial groups at the phylum level in preplanted and rhizosphere (a and c) and preplanted and bulk/residual (b and d) soils at different A. fatua growth stages as detected by Illumina sequencing of 16S rRNA gene amplicons. Data are presented as means ± standard errors (n = 16). *, P < 0.05, **, P < 0.01, ***, P < 0.001.
Mentions: The relative abundances of several abundant bacterial phyla (classes for the Proteobacteria phylum) differed significantly between rhizosphere and bulk/residual soil communities. Proteobacteria (particularly Alphaproteobacteria, Betaproteobacteria, and Gammaproteobacteria) and Bacteroidetes became significantly enriched in the rhizosphere compared to the preplanted (week 0) soils (Fig. 5a and c). In contrast, the relative abundances of Actinobacteria, Acidobacteria, Firmicutes, Planctomycetes, Gemmatimonadetes, and Chloroflexi were significantly reduced in the rhizosphere compared to preplanted soil, and in general, their relative abundances decreased gradually over time (Fig. 5a and c). Generally, the patterns of bacterial responses to plant growth are consistent between two seasons. Compared to the rhizosphere communities, the relative abundances of commonly occurring bacterial groups in the bulk/residual soils remained relatively stable across sampling time points in both seasons, and in some cases, the direction of changes in relative phylum abundance was opposite that observed in the rhizosphere communities (Fig. 5b and d).

Bottom Line: Succession in the rhizosphere was characterized by a significant decrease in both taxonomic and phylogenetic diversity relative to background soil communities, driven by reductions in both richness and evenness of the bacterial communities.Plant roots selectively stimulated the relative abundance of Alphaproteobacteria, Betaproteobacteria, and Bacteroidetes but reduced the abundance of Acidobacteria, Actinobacteria, and Firmicutes.The reproducibility of rhizosphere succession and the apparent phylogenetic conservation of rhizosphere competence traits suggest adaptation of the indigenous bacterial community to this common grass over the many decades of its presence.

View Article: PubMed Central - PubMed

Affiliation: Department of Environmental Science, Policy and Management, University of California, Berkeley, California, USA Department of Microbiology and Plant Biology, Institute for Environmental Genomics, University of Oklahoma, Norman, Oklahoma, USA.

No MeSH data available.