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Moritz, F. ; Kaling, M. ; Schnitzler, J.-P. ; Schmitt-Kopplin, P.

Characterization of poplar metabotypes via mass difference enrichment analysis.

Plant Cell Environ. 40, 1057-1073 (2017)
Postprint Research data DOI PMC
Open Access Green
Instrumentation technology for metabolomics has advanced drastically in recent years in terms of sensitivity and specificity. Despite these technical advances, data analytical strategies are still in their infancy in comparison with other ‘omics’. Plants are known to possess an immense diversity of secondary metabolites. Typically, more than 70% of metabolomics data are not amenable to systems biological interpretation due to poor database coverage. Here, we propose a new general strategy for mass spectrometry-based metabolomics that incorporates all exact mass features with known sum formulae into the evaluation and interpretation of metabolomics studies. We extend the use of mass differences, commonly used for feature annotation, by re-defining them as variables that reflect the remaining ‘omic’ domains. The strategy uses exact mass difference network analyses exemplified for the metabolomic description of two gray poplar (Populus x canescens) genotypes that differ in their capability to emit isoprene. This strategy established a direct connection between the metabotype and the non-isoprene emitting phenotype, as mass differences pertaining to prenylation reactions were over-represented in non-isoprene emitting poplars. The analysis of mass differences was not only able to grasp the known chemical biology of poplar but it also improved the interpretability of yet unknown biochemical relationships.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Populus x canescens; systems chemical biology; metabolomics; networks; mass difference analysis; Isoprene-emitting Poplars; Non-targeted Metabolomics; Structural-characterization; Phenolic Glycosides; Stress Responses; Flux Analysis; Arabidopsis; Biosynthesis; Metabolism; Plants
ISSN (print) / ISBN 0140-7791
e-ISSN 1365-3040
Journal Plant, Cell and Environment
Quellenangaben Volume: 40, Issue: 7, Pages: 1057-1073 Article Number: , Supplement: ,
Publisher Wiley
Publishing Place Malden, MA
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Research Unit Analytical BioGeoChemistry (BGC)
Research Unit Environmental Simulation (BIOP-EUS)