Abstract

Sea buckthorn (Hippophae L.) is an economically important shrub or small tree distributed in Eurasia. Most of its well-recognized medicinal and nutraceutical products are derived from its berry oil, which is rich in monounsaturated omega-7 (C16:1) fatty acid and polyunsaturated omega-6 (C18:2) and omega-3 (C18:3) fatty acids. In this study, tandem mass tags (TMT)-based quantitative analysis was used to investigate protein profiles of lipid metabolism in sea buckthorn berries harvested 30, 50, and 70 days after flowering. In total, 8626 proteins were identified, 6170 of which were quantified. Deep analysis results for the proteins identified and related pathways revealed initial fatty acid accumulation during whole-berry development. The abundance of most key enzymes involved in fatty acid and triacylglycerol (TAG) biosynthesis peaked at 50 days after flowering, but TAG synthesis through the PDAT (phospholipid: diacylglycerol acyltransferase) pathway mostly occurred early in berry development. In addition, the patterns of proteins involved in lipid metabolism were confirmed by combined quantitative real-time polymerase chain reaction, enzyme-linked immunosorbent assay, and parallel reaction monitoring analyses. Our data on the proteomic spectrum of sea buckthorn berries provide a scientific basic for understanding lipid metabolism and related pathways in the developing berries.

Keywords

Hippophae L; proteomics; lipid metabolism; TMT-based quantitative analysis

Published in

Journal of Proteome Research
2019, Volume: 18, number: 5, pages: 1958-1969

SLU Authors

• Nybom, Hilde

  • Department of Plant Breeding, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Horticulture
Organic Chemistry
Food Science


Publication identifier

DOI: https://doi.org/10.1021/acs.jproteome.8b00764

Permanent link to this page (URI)

https://res.slu.se/id/publ/99946