A meta-analysis approach for assessing the diversity and specificity of belowground root and microbial volatiles

  • Volatile organic compounds are secondary metabolites emitted by all organisms, especially by plants and microbes. Their role as aboveground signals has been established for decades. Recent evidence suggests that they might have a non-negligible role belowground and might be involved in root–root and root–microbial/pest interactions. Our aim here was to make a comprehensive review of belowground volatile diversity using a meta-analysis approach. At first we synthesized current literature knowledge on plant root volatiles and classified them in terms of chemical diversity. In a second step, relying on the mVOC database of microbial volatiles, we classified volatiles based on their emitters (bacteria vs. fungi) and their specific ecological niche (i.e., rhizosphere, soil). Our results highlight similarities and differences among root and microbial volatiles and also suggest that some might be niche specific. We further explored the possibility that volatiles might be involved in intra- and inter-specific root–root communication and discuss the ecological implications of such scenario. Overall this work synthesizes current knowledge on the belowground volatilome and the potential signaling role of its constituents. It also highlights that the total diversity of belowground volatiles might be orders of magnitude larger that the few hundreds of compounds described to date.

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Author:Denis Schenkel, Marie Chantal Lemfack, Birgit Piechulla, Richard Splivallo
Parent Title (English):Frontiers in plant science
Publisher:Frontiers Research Foundation
Place of publication:Lausanne
Document Type:Article
Year of Completion:2015
Date of first Publication:2015/09/14
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2019/10/22
Tag:bacteria; diversity; fungi; microbes; mycorrhizas; rhizosphere; roots; volatiles
Issue:art. 707
Copyright © 2015 Schenkel, Lemfack, Piechulla and Splivallo. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY) http://creativecommons.org/licenses/by/4.0/ . The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Institutes:Biowissenschaften / Biowissenschaften
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 58 Pflanzen (Botanik) / 580 Pflanzen (Botanik)
Licence (German):License LogoCreative Commons - Namensnennung 4.0