Metabolomics Reveals Drastic Compositional Changes during Overwintering of Jerusalem Artichoke (Helianthus tuberosus L.) Tubers

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• 作者：Morten R. Clausen ; Vibe Bach ; Merete Edelenbos ; Hanne C. Bertram
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2012
• 出版时间：September 19, 2012
• 年：2012
• 卷：60
• 期：37
• 页码：9495-9501
• 全文大小：294K
• 年卷期：v.60,no.37(September 19, 2012)
• ISSN：1520-5118

文摘

Metabolic changes were investigated in overwintering Jerusalem artichoke (Helianthus tuberosus L.) tubers using proton nuclear magnetic resonance (¹H NMR) metabolomics. Three varieties were studied; as a result of overwintering, the amount of inulin was found to decrease in Jerusalem artichoke tubers. This was mainly due to its conversion to sucrose and, at the same time, formation of inulin with a lower degree of polymerization. Major effects on the concentration of citric acid, malic acid, 纬-aminobutyric acid (GABA), and adenosine were also found. Intriguingly, malic acid concentration increased and citric acid concentration decreased. These changes, together with an increase in sucrose and GABA concentrations, were ascribed to mobilization of nutrients prior to sprouting, suggesting that malic acid and GABA serve as carbon and nitrogen sources during sprouting of Jerusalem artichokes.

Keywords:

Jerusalem artichokes; citric acid; malic acid; 纬-aminobutyric acid; overwintering; ¹H NMR