Metabolite-centric reporter pathway and tripartite network analysis of Arabidopsis under cold stress

Ibrahim Koç, Isa Yuksel, Gustavo Caetano-Anollés

Research output: Contribution to journalArticle

Abstract

The study of plant resistance to cold stress and the metabolic processes underlying its molecular mechanisms benefit crop improvement programs. Here we investigate the effects of cold stress on the metabolic pathways of Arabidopsis when directly inferred at system level from transcriptome data. A metabolite-centric reporter pathway analysis approach enabled the computation of metabolites associated with transcripts at four time points of cold treatment. Tripartite networks of gene-metabolite-pathway connectivity outlined the response of metabolites and pathways to cold stress. Our metabolome-independent analysis revealed stress-associated metabolites in pathway routes of the cold stress response, including amino acid, carbohydrate, lipid, hormone, energy, photosynthesis, and signaling pathways. Cold stress first triggered the mobilization of energy from glycolysis and ethanol degradation to enhance TCA cycle activity via acetyl-CoA. Interestingly, tripartite networks lacked power law behavior and scale free connectivity, favoring modularity. Network rewiring explicitly involved energetics, signal, carbon and redox metabolisms and membrane remodeling.

Original languageEnglish (US)
Article number121
JournalFrontiers in Bioengineering and Biotechnology
Volume6
Issue numberSEP
DOIs
StatePublished - Sep 11 2018

Keywords

  • Cold stress
  • Microarray
  • Network modularity
  • Pathway analysis
  • Power law
  • Reporter metabolite
  • Reporter pathway

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Histology
  • Biomedical Engineering

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