Interrogation of spatial metabolome of Ginkgo biloba with high‐resolution matrix‐assisted laser desorption/ionization and laser desorption/ionization mass spectrometry imaging
- State Key Laboratory of Natural Medicines China Pharmaceutical University Nanjing China, School of Traditional Chinese Pharmacy China Pharmaceutical University Nanjing China, Department of Chemistry and Beckman Institute for Advanced Science and Technology University of Illinois at Urbana−Champaign Urbana Illinois United States
- Department of Chemistry and Beckman Institute for Advanced Science and Technology University of Illinois at Urbana−Champaign Urbana Illinois United States
- State Key Laboratory of Natural Medicines China Pharmaceutical University Nanjing China, School of Traditional Chinese Pharmacy China Pharmaceutical University Nanjing China
Abstract Ginkgo biloba is one of the oldest extant seed plants and has a number of unique properties and uses. Numerous efforts have characterized metabolites within the ginkgo plant and their corresponding biosynthesis pathways, but spatio‐chemical information on ginkgo metabolites is lacking. Mass spectrometry (MS) imaging was used to interrogate the spatio‐chemical localization of metabolites with matrix‐assisted laser desorption/ionization and laser desorption/ionization Fourier‐transform ion cyclotron resonance MS across the ginkgo leaf. Flavonoids, particularly unexpected and rare flavonoid cyclodimers, were detected predominately from leaf epidermis; ginkgolic acids and cardanols were observed exclusively in the secretory cavities. A non‐uniform distribution of flavonoids observed between the upper and lower leaf epidermis was verified by liquid chromatography–MS analyses. Other metabolites, such as saccharides, phospholipids, and chlorophylls, occurred mainly in mesophyll cells. Furthermore, organ‐ and tissue‐specific distributions of ginkgolides were revealed in the ginkgo root, young stem, and leaf. The acquired ion images provide important information regarding biosynthesis, transportation, and accumulation of metabolites throughout the ginkgo plant and should help us to understand the physiological roles of several plant secondary metabolites.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1463202
- Journal Information:
- Plant, Cell and Environment, Journal Name: Plant, Cell and Environment Vol. 41 Journal Issue: 11; ISSN 0140-7791
- Publisher:
- Wiley-BlackwellCopyright Statement
- Country of Publication:
- United Kingdom
- Language:
- English
Web of Science
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