+ Site Statistics
References:
54,258,434
Abstracts:
29,560,870
PMIDs:
28,072,757
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

Effects of plant biomass, plant diversity, and water content on bacterial communities in soil lysimeters: implications for the determinants of bacterial diversity



Effects of plant biomass, plant diversity, and water content on bacterial communities in soil lysimeters: implications for the determinants of bacterial diversity



Applied and Environmental Microbiology 73(21): 6916-6929



Soils may comprise tens of thousands to millions of bacterial species. It is still unclear whether this high level of diversity is governed by functional redundancy or by a multitude of ecological niches. In order to address this question, we analyzed the reproducibility of bacterial community composition after different experimental manipulations. Soil lysimeters were planted with four different types of plant communities, and the water content was adjusted. Group-specific phylogenetic fingerprinting by PCR-denaturing gradient gel electrophoresis revealed clear differences in the composition of Alphaproteobacteria, Betaproteobacteria, Bacteroidetes, Chloroflexi, Planctomycetes, and Verrucomicrobia populations in soils without plants compared to that of populations in planted soils, whereas no influence of plant species composition on bacterial diversity could be discerned. These results indicate that the presence of higher plant species affects the species composition of bacterial groups in a reproducible manner and even outside of the rhizosphere. In contrast, the environmental factors tested did not affect the composition of Acidobacteria, Actinobacteria, Archaea, and Firmicutes populations. One-third (52 out of 160) of the sequence types were found to be specifically and reproducibly associated with the absence or presence of plants. Unexpectedly, this was also true for numerous minor constituents of the soil bacterial assemblage. Subsequently, one of the low-abundance phylotypes (beta10) was selected for studying the interdependence under particular experimental conditions and the underlying causes in more detail. This so-far-uncultured phylotype of the Betaproteobacteria species represented up to 0.18% of all bacterial cells in planted lysimeters compared to 0.017% in unplanted systems. A cultured representative of this phylotype exhibited high physiological flexibility and was capable of utilizing major constituents of root exudates. Our results suggest that the bacterial species composition in soil is determined to a significant extent by abiotic and biotic factors, rather than by mere chance, thereby reflecting a multitude of distinct ecological niches.

(PDF emailed within 0-6 h: $19.90)

Accession: 015649256

Download citation: RISBibTeXText

PMID: 17873072

DOI: 10.1128/aem.01533-07


Related references

Positive correlation between soil bacterial metabolic and plant species diversity and bacterial and fungal diversity in a vegetation succession on Karst. Plant and Soil 307(1-2): 123-134, 2008

Unravelling the effects of plant species diversity and aboveground litter input on soil bacterial communities. Geoderma 317: 1-7, 2018

Opposing phylogenetic diversity gradients of plant and soil bacterial communities. Proceedings. Biological Sciences 283(1825): 20153003, 2016

Synergistic effects of grassland plant species on soil microbial biomass and activity: Implications for ecosystem-level effects of enriched plant diversity. Functional Ecology 10(3): 410-416, 1996

Synergistic Effects of Grassland Plant Spcies on Soil Microbial Biomass and Activity: Implications for Ecosystem-Level Effects of Enriched Plant Diversity. Functional Ecology 10(3): 410-416, 1996

Starving the soil of plant inputs for 50 years reduces abundance but not diversity of soil bacterial communities. Soil Biology and Biochemistry 41(9): 2021-2024, 2009

Plant diversity improves protection against soil-borne pathogens by fostering antagonistic bacterial communities. Journal of Ecology 100(3): 597-604, 2012

Species Diversity and Functional Prediction of Soil Bacterial Communities in Constructed Wetlands with Different Plant Conditions. Current Microbiology 2019, 2019

Competition and herbivory in establishing grassland communities: Implications for plant biomass, species diversity and soil microbial activity. Oikos 80(3): 470-480, 1997

Genetic diversity of bacterial communities of serpentine soil and of rhizosphere of the nickel-hyperaccumulator plant Alyssum bertolonii. Microbial Ecology 48(2): 209-217, 2004

Genetic Diversity of Bacterial Communities of Serpentine Soil and of Rhizosphere of the Nickel-Hyperaccumulator Plant Alyssum bertolonii. Microbial Ecology 48(2): 209-217, 2004

Structural and functional diversity of soil bacterial and fungal communities following woody plant encroachment in the southern Great Plains. Soil Biology and Biochemistry 42(10): 1816-1824, 2010

No consistent effects of plant diversity on root biomass, soil biota and soil abiotic conditions in temperate grassland communities. Applied Soil Ecology ember; 24(1): 101-111, 2003

Plant biomass, soil water content and soil NP ratio regulating soil microbial functional diversity in a temperate steppe a regional scale study. Soil Biology & Biochemistry: 3, 445-450, 2010

Elevated precipitation modifies the relationship between plant diversity and soil bacterial diversity under nitrogen deposition in Stipa baicalensis steppe. Applied Soil Ecology 119: 345-353, 2017