U.S. Department of Energy Office of Biological and Environmental Research

BER Research Highlights


Unraveling Plant-Microbe Communication
Published: July 12, 2013
Posted: September 12, 2013

The soil environment contains a complex of microbial communities living in close association with plants, both outside the root (rhizosphere) and within (endosphere). These interactions between plants and microbes can significantly influence plant growth and development and, in the case of beneficial microorganisms, increase plant health and yield. These complex interactions involve cell-to-cell communication, but very little is known about how these signals are triggered and regulated. To better understand the dynamics of these systems, scientists at Oak Ridge National Laboratory have undertaken an extensive survey of the “microbiome” of the woody perennial Populus , a tree that has intimate associations with many types of beneficial fungi and bacteria and is a potential biofuel feedstock for cellulosic ethanol production. Focusing on a specific type of sensing molecule known as acyl-homoserine lactone (AHL), the researchers screened 129 bacterial isolates from P. deltoides (Eastern cottonwood) and found that 40% were AHL positive. Furthermore, they found a subgroup of AHL-controlled regulators that respond to unknown plant-derived signals rather than bacterial AHLs. The results indicate that the microbiota that comprises the Populus root zone has substantial capacity for cell-to-cell communication, furthering our understanding of the role these microbial signaling molecules play in the plant’s biology.

Reference: Schaefer, A. L., C. R. Lappala, R. P. Morlen, D. A. Pelletier, T.-Y. S. Lu, P. K. Lankford, C. S. Harwood, and E. P. Greenberg. 2013. “LuxR- and LuxI-type Quorum Sensing Circuits Are Prevalent in Members of the Populus deltoides Microbiome,” Applied and Environmental Microbiology 79 , 5745–52. DOI: 10.1128/AEM.01417-13. (Reference link)

Contact: Cathy Ronning, SC-23.2, (301) 903-9549
Topic Areas:

  • Research Area: Genomic Analysis and Systems Biology
  • Research Area: Microbes and Communities
  • Research Area: Plant Systems and Feedstocks, Plant-Microbe Interactions
  • Research Area: Sustainable Biofuels and Bioproducts

Division: SC-23.2 Biological Systems Science Division, BER

 

BER supports basic research and scientific user facilities to advance DOE missions in energy and environment. More about BER

Recent Highlights

Aug 24, 2019
New Approach for Studying How Microbes Influence Their Environment
A diverse group of scientists suggests a common framework and targeting of known microbial processes [more...]

Aug 08, 2019
Nutrient-Hungry Peatland Microbes Reduce Carbon Loss Under Warmer Conditions
Enzyme production in peatlands reduces carbon lost to respiration under future high temperatures. [more...]

Aug 05, 2019
Amazon Forest Response to CO2 Fertilization Dependent on Plant Phosphorus Acquisition
AmazonFACE Model Intercomparison. The Science Plant growth is dependent on the availabi [more...]

Jul 29, 2019
A Slippery Slope: Soil Carbon Destabilization
Carbon gain or loss depends on the balance between competing biological, chemical, and physical reac [more...]

Jul 15, 2019
Field Evaluation of Gas Analyzers for Measuring Ecosystem Fluxes
How gas analyzer type and correction method impact measured fluxes. The Science A side- [more...]

List all highlights (possible long download time)