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Title: Metabolite fingerprinting of pennycress ( Thlaspi arvense L.) embryos to assess active pathways during oil synthesis

Abstract

Pennycress ( Thlaspi arvense L.), a plant naturalized to North America, accumulates high levels of erucic acid in its seeds, which makes it a promising biodiesel and industrial crop. The main carbon sinks in pennycress embryos were found to be proteins, fatty acids, and cell wall, which respectively represented 38.5, 33.2, and 27.0% of the biomass at 21 days after pollination. Erucic acid reached a maximum of 36% of the total fatty acids. Together these results indicate that total oil and erucic acid contents could be increased to boost the economic competitiveness of this crop. Understanding the biochemical basis of oil synthesis in pennycress embryos is therefore timely and relevant to guide future breeding and/or metabolic engineering efforts. For this purpose, a combination of metabolomics approaches was conducted to assess the active biochemical pathways during oil synthesis. First, gas chromatography-mass spectrometry (GC-MS) profiling of intracellular metabolites highlighted three main families of compounds: organic acids, amino acids, and sugars/sugar alcohols. Secondly, these intermediates were quantified in developing pennycress embryos by liquid chromatography-tandem mass spectrometry (LC-MS/MS) in multiple reaction monitoring mode. Finally, partitional clustering analysis grouped the intracellular metabolites that shared a similar pattern of accumulation over time into eight clusters. Inmore » conclusion, this study underlined that: (i) sucrose might be stored rather than cleaved into hexoses; (ii) glucose and glutamine would be the main sources of carbon and nitrogen, respectively; and (iii) glycolysis, the oxidative pentose phosphate pathway, the tricarboxylic acid cycle, and the Calvin cycle were active in developing pennycress embryos.« less

Authors:
 [1];  [2];  [3];  [1]
  1. The Ohio State Univ., Columbus, OH (United States). Dept of Molecular Genetics
  2. The Ohio State Univ., Columbus, OH (United States). Dept of Molecular Genetics; The Ohio State Univ., Columbus, OH (United States). Center for Applied Plant Sciences
  3. Univ. of Puerto Rico, Mayaguez (Puerto Rico). Dept. of Mechanical Engineering
Publication Date:
Research Org.:
The Ohio State Univ., Columbus, OH (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1344514
Grant/Contract Number:  
SC0016490
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Experimental Botany
Additional Journal Information:
Journal Volume: 66; Journal Issue: 14; Journal ID: ISSN 0022-0957
Publisher:
Oxford University Press
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; alternative crop; GC-MS; LC-MS/MS; Thlaspi arvense L.; erucic acid; jet fuel; metabolomics; oilseed; pennycress; plant metabolism; triacylglycerols

Citation Formats

Tsogtbaatar, Enkhtuul, Cocuron, Jean -Christophe, Sonera, Marcos Corchado, and Alonso, Ana Paula. Metabolite fingerprinting of pennycress (Thlaspi arvense L.) embryos to assess active pathways during oil synthesis. United States: N. p., 2015. Web. doi:10.1093/jxb/erv020.
Tsogtbaatar, Enkhtuul, Cocuron, Jean -Christophe, Sonera, Marcos Corchado, & Alonso, Ana Paula. Metabolite fingerprinting of pennycress (Thlaspi arvense L.) embryos to assess active pathways during oil synthesis. United States. doi:10.1093/jxb/erv020.
Tsogtbaatar, Enkhtuul, Cocuron, Jean -Christophe, Sonera, Marcos Corchado, and Alonso, Ana Paula. Sun . "Metabolite fingerprinting of pennycress (Thlaspi arvense L.) embryos to assess active pathways during oil synthesis". United States. doi:10.1093/jxb/erv020. https://www.osti.gov/servlets/purl/1344514.
@article{osti_1344514,
title = {Metabolite fingerprinting of pennycress (Thlaspi arvense L.) embryos to assess active pathways during oil synthesis},
author = {Tsogtbaatar, Enkhtuul and Cocuron, Jean -Christophe and Sonera, Marcos Corchado and Alonso, Ana Paula},
abstractNote = {Pennycress (Thlaspi arvense L.), a plant naturalized to North America, accumulates high levels of erucic acid in its seeds, which makes it a promising biodiesel and industrial crop. The main carbon sinks in pennycress embryos were found to be proteins, fatty acids, and cell wall, which respectively represented 38.5, 33.2, and 27.0% of the biomass at 21 days after pollination. Erucic acid reached a maximum of 36% of the total fatty acids. Together these results indicate that total oil and erucic acid contents could be increased to boost the economic competitiveness of this crop. Understanding the biochemical basis of oil synthesis in pennycress embryos is therefore timely and relevant to guide future breeding and/or metabolic engineering efforts. For this purpose, a combination of metabolomics approaches was conducted to assess the active biochemical pathways during oil synthesis. First, gas chromatography-mass spectrometry (GC-MS) profiling of intracellular metabolites highlighted three main families of compounds: organic acids, amino acids, and sugars/sugar alcohols. Secondly, these intermediates were quantified in developing pennycress embryos by liquid chromatography-tandem mass spectrometry (LC-MS/MS) in multiple reaction monitoring mode. Finally, partitional clustering analysis grouped the intracellular metabolites that shared a similar pattern of accumulation over time into eight clusters. In conclusion, this study underlined that: (i) sucrose might be stored rather than cleaved into hexoses; (ii) glucose and glutamine would be the main sources of carbon and nitrogen, respectively; and (iii) glycolysis, the oxidative pentose phosphate pathway, the tricarboxylic acid cycle, and the Calvin cycle were active in developing pennycress embryos.},
doi = {10.1093/jxb/erv020},
journal = {Journal of Experimental Botany},
issn = {0022-0957},
number = 14,
volume = 66,
place = {United States},
year = {2015},
month = {2}
}

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