The nonvolatile metabolome of sunflower linear glandular trichomes. (November 2015)

• Record Type: Journal Article
• Authors: Spring, Otmar; Pfannstiel, Jens; Klaiber, Iris; Conrad, Jürgen; Beifuß, Uwe; Apel, Lysanne; Aschenbrenner, Anna-Katharina; Zipper, Reinhard
• Is Part Of: Phytochemistry. Volume 119(2015:Nov.)
• Page Start: 83
• Page End: 89
• Publication Date: 2015-11
• Subjects: Helianthus annuus (Asteraceae) trichome phytochemistry -- Sesquiterpene biosynthesis -- Flavonoids -- 1H NMR -- LC–MS/MS; Botanical chemistry -- Periodicals; Biochemistry -- Periodicals; Botany -- Periodicals; Chimie végétale -- Périodiques; 572.2
• DOI: 10.1016/j.phytochem.2015.09.007
• Languages: English
• ISSNs: 0031-9422

Abstract

Abstract : Graphical abstract: HPLC analysis of the metabolite profile of sunflower trichomes afforded 4 previously undescribed sesquiterpenes of the helibisabonol- and glandulone-type, and proved the presence of various nevadensin derived flavonoids in the same compartment. Highlights: Four new sesquiterpenes were identified. A biogenetic pathway for bisabolene-type sesquiterpenes is proposed. Nonvolatile sesquiterpenes and flavonoids co-occur in sunflower glandular trichomes. Abstract: Uniseriate linear glandular trichomes occur on stems, leaves and flowering parts of Helianthus species and related taxa. Their metabolic activity and biological function are still poorly understood. A phytochemical study documented the accumulation of bisabolene type sesquiterpenes and flavonoids as the major constituents of the non-volatile metabolome of linear glandular trichomes in the common sunflower, Helianthus annuus . Besides known sesquiterpenes of the glandulone, helibisabonol and heliannuol type, four previously undescribed sesquiterpenes named glandulone D, E, F and helibisabonol C were identified by spectroscopic analysis. In addition, four known nevadensin type flavonoids varying in O-methoxy substitutions were found. None of them has previously been reported from Helianthus annuus .