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Biogenic volatile emissions from the soil.

J Peñuelas1, D Asensio, D Tholl

  • 1Global Ecology Unit CREAF-CEAB-CSIC-UAB, CSIC, Catalonia, Spain; CREAF, Catalonia, Spain.

Plant, Cell & Environment
|April 3, 2014
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Summary
This summary is machine-generated.

Soil is a significant source of biogenic volatile organic compounds (bVOCs), impacting atmospheric exchange. This review explores soil VOCs, their detection, and their role in belowground ecological interactions.

Keywords:
Biogenic VOCsmicrobial VOCsplant root volatile emissionrhizobacteriarhizospheresoil fungivolatile organic compounds (VOCs)

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Area of Science:

  • Environmental Science
  • Soil Science
  • Biogeochemistry

Background:

  • Volatile organic compounds (VOCs) are increasingly recognized as significant components of soil ecosystems.
  • Soil acts as a substantial reservoir and source of biogenic volatile organic compounds (bVOCs), originating from decomposition and biological synthesis.
  • Understanding soil VOC exchange with the atmosphere is crucial for comprehending belowground ecological processes.

Purpose of the Study:

  • To review current knowledge on the exchange of VOCs between soil and atmosphere.
  • To highlight the structural features of soil that facilitate volatile diffusion and VOC-based interactions.
  • To explore the sources, detection methods, and ecological roles of soil-derived VOCs.

Main Methods:

  • Literature review of existing data on soil VOCs.
  • Analysis of soil and particle structure influencing volatile diffusion.
  • Description of methodologies for detecting belowground volatiles.
  • Discussion of microbial and plant root metabolic pathways for VOC production.

Main Results:

  • Soil can function as both a sink and a source for bVOCs.
  • Soil VOC emissions are generally lower than those from aboveground vegetation.
  • Microorganisms and plant roots are primary sources of soil bVOCs.
  • VOC profiles serve as non-destructive indicators for organism identification.

Conclusions:

  • Soil VOCs play a critical role in belowground ecological interactions, including microbial, plant, and invertebrate communities.
  • Further research is needed to fully elucidate the complex dynamics of soil VOC exchange and their ecological significance.
  • Developing advanced detection methods for belowground volatiles is essential for advancing soil ecology studies.