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Journal article
Soil metabolomics - current challenges and future perspectives
Soil biology & biochemistry, Vol.193, 109382
2024
Abstract
Soil is an extremely complex and dynamic matrix, in part, due to the wide diversity of organisms living within it. Soil organic matter (SOM) is the fundamental substrate on which the delivery of ecosystem services depends, providing the metabolic fuel to drive soil function. As such, studying the soil metabolome (the diversity and concentration of low molecular weight metabolites), as a subset of SOM, holds the potential to greatly expand our understanding of the behaviour, fate, interaction and functional significance of small organic molecules in soil. Encompassing a wide range of chemical classes (including amino acids, peptides, lipids and carbohydrates) and a large number of individual molecules (ca. n = 105 to 106), the metabolome is a resultant (indirect) output of several layers of a biological hierarchy, namely the metagenome, metatranscriptome and metaproteome. As such, it may also provide support and validation for these “multi-omics” datasets. We present a case for the increased use of untargeted metabolomics in soil biochemistry, particularly for furthering our fundamental understanding of the functions driving SOM composition and biogeochemical cycling. Further, we discuss the scale of the challenge in terms of metabolite extraction, analysis and interpretation in complex plant-soil-microbial systems. Lastly, we highlight key knowledge gaps which currently limit our use of metabolomic approaches to better understand soil processes, including: (i) interpretation of large untargeted metabolomic datasets; (ii) the source, emission and fate of soil-derived volatile organic compounds (VOCs), (iii) assessing temporal fluxes of metabolites, and (iv) monitoring ecological interactions in the rhizosphere. While the application of metabolomics in ecosystem science is still in its relative infancy, its importance in understanding the biochemical system in relation to regulation, management and underpinning the delivery of ecosystem services is key to further elucidating the complex links between organisms, as well as the fundamental ability of the biological community to process and cycle key nutrients.
•Soil organic matter is the metabolic fuel that drives soil function.•Untargeted metabolomics offers rich and functional biochemical data.•Discussion of challenges in extraction and analysis of complex substrates.•Emphasis of key knowledge gaps in interpretation and monitoring of soil.
Details
- Title
- Soil metabolomics - current challenges and future perspectives
- Authors/Creators
- Robert W. Brown - Bangor UniversityMichaela K. Reay - University of BristolFlorian Centler - School of Life Sciences, Siegen University, 57076 Siegen, GermanyDavid R. Chadwick - Bangor UniversityIan D. Bull - University of BristolJames E. McDonald - School of Environmental and Natural Sciences, Bangor University, Bangor, Gwynedd, LL57 2UW, UKRichard P. Evershed - University of BristolDavey L. Jones - Bangor University
- Publication Details
- Soil biology & biochemistry, Vol.193, 109382
- Publisher
- Elsevier Ltd
- Identifiers
- 991005649566507891
- Copyright
- © 2024 The Authors.
- Murdoch Affiliation
- Centre for Sustainable Farming Systems
- Language
- English
- Resource Type
- Journal article
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