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Related Experiment Video

Updated: Jun 19, 2026

Isolation and Analysis of Microbial Communities in Soil, Rhizosphere, and Roots in Perennial Grass Experiments

Isolation and Analysis of Microbial Communities in Soil, Rhizosphere, and Roots in Perennial Grass Experiments

Published on: July 24, 2018

Pyrene effects on rhizoplane bacterial communities.

Ian N Balcom¹, David E Crowley

¹Department of Environmental Sciences, University of California, Riverside, CA, USA.

International Journal of Phytoremediation

|October 9, 2009

Summary

Plants significantly enhance the breakdown of polycyclic aromatic hydrocarbons (PAHs) in soil. Rhizoplane bacterial communities shift in response to pyrene contamination, plant type, and soil history.

Area of Science:

Environmental microbiology
Bioremediation
Plant-microbe interactions

Background:

Polycyclic aromatic hydrocarbons (PAHs) are persistent organic pollutants.
Certain plants can enhance PAH biodegradation, but associated microbial communities are understudied.
Rhizoplane microbial communities play a crucial role in soil pollutant degradation.

Purpose of the Study:

To characterize rhizoplane bacterial communities in relation to PAH degradation.
To investigate the influence of plant species and PAH contamination history on microbial composition.
To assess the impact of pyrene spiking on bacterial diversity in the rhizoplane.

Main Methods:

Four plant species (three known to stimulate PAH degradation and wheat as a reference) were grown in soils with varying PAH exposure.

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Exploring the Root Microbiome: Extracting Bacterial Community Data from the Soil, Rhizosphere, and Root Endosphere

Exploring the Root Microbiome: Extracting Bacterial Community Data from the Soil, Rhizosphere, and Root Endosphere

Published on: May 2, 2018

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Last Updated: Jun 19, 2026

Isolation and Analysis of Microbial Communities in Soil, Rhizosphere, and Roots in Perennial Grass Experiments

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Published on: July 24, 2018

Plant-Microbe Interaction: Transcriptional Response of Bacillus Mycoides to Potato Root Exudates

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Exploring the Root Microbiome: Extracting Bacterial Community Data from the Soil, Rhizosphere, and Root Endosphere

Exploring the Root Microbiome: Extracting Bacterial Community Data from the Soil, Rhizosphere, and Root Endosphere

Published on: May 2, 2018

Soils were spiked with pyrene (100 mg kg(-1)) to evaluate biodegradation rates.

Bacterial rhizoplane communities were analyzed using 16S rRNA gene profiling.

Main Results:

Plant cultivation led to 95% pyrene disappearance, compared to 45% in unplanted soil.
No significant differences in pyrene degradation were observed among the tested plant species.
Pyrene contamination reduced bacterial richness and evenness in rhizoplane communities.
Rhizosphere bacterial community composition shifted significantly due to pyrene, plant species, and soil history.

Conclusions:

Plants dramatically enhance pyrene biodegradation in contaminated soils.
Rhizoplane bacterial communities are sensitive to pyrene contamination, plant presence, and soil history.
Understanding these shifts is key for optimizing phytoremediation strategies for PAH-contaminated sites.