Journal
BIOLOGIA PLANTARUM
Volume 64, Issue -, Pages 43-49Publisher
ACAD SCIENCES CZECH REPUBLIC, INST EXPERIMENTAL BOTANY
DOI: 10.32615/bp.2019.133
Keywords
free fatty acids; oxylipin-containing lipids; volatile organic compounds
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Funding
- National Natural Science Foundation of China [41606164]
- Zhejiang Provincial Natural Science Foundation of China [LQ15D060001]
- Open Fund of Zhejiang Provincial Top Key Discipline of Aquaculture in Ningbo University [xkzsc1418]
- Ecology Key Disciplines of Zhejiang Province in Taizhou University [EKD 2013-08]
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Lipids are vital cellular constituents in plant, and lipid peroxidation metabolites are critical defence substances in plants. In this study, mass spectrometry along with projections to latent structures discriminant analysis (PLS-DA) was used to detect lipid metabolism changes in Arabidopsis thaliana in response to oligochitosan (an effective resistance elicitor for the control of plant diseases). The PLS-DA showed that lipid metabolites of Arabidopsis thaliana were influenced by oligochitosan treatment. The total content of oxylipin containing monogalactosyldiacylglycerols, oxylipin-containing digalactosyldiacylglycerols, and oxylipin-containing phosphatidylglycerols increased firstly (after 1 h), and then decreased with the increase of oligochitosan treatment duration. In contrast, the total content of monogalactosyldiacylglycerols, phosphatidylcholines, phosphatidyl-ethanolamine, and phosphatidylglycerols decreased firstly, and then increased with the increase of oligochitosan treatment duration. The amounts of free fatty acids (C16:2, C16:3, C18:2, and C18:3) were lower after treatment with oligochitosan for 1, 3, and 6 h than in the control, while the production of volatile organic compounds such as 2-hexenal (except for 3 h) and nonanal was higher than in the control. In conclusion, lipid metabolites of Arabidopsis thaliana were influenced by oligochitosan treatment, and the synthesized lipids and oxylipin-containing lipids were remodelled and free fatty acids was metabolized to volatile organic compounds.
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