Palaeophytochemical Constituents of Cretaceous Ginkgo coriacea Florin Leaves |
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Authors: | You-Xing Zhao Cheng-Sen Li Xiao-Dong Luo Yu-Fei Wang Jun Zhou |
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Institution: | State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, the Chinese Academy of Sciences;, Kunming 650204, China;Institute of Botany, the Chinese Academy of Sciences;, Beijing 100093, China |
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Abstract: | Chemical investigation of the organic solvent extract of Cretaceous Ginkgo coriacea Florin leaves by liquid chromatography-mass spectroscopy (LC-MS) and gas chromatography-mass spectrometry (GC-MS), analogous to those from extant leaves of Ginkgo biloba L., led to the detection of a group of natural flavonoids and other volatiles. The similarity of the chemical constituents in these two species of Ginkgo suggest that the secondary metabolism of extant G. biloba is close to that of the Cretaceous species. The remaining natural products may be one explanation why the leaves of the Cretaceous G. coriacea have been preserved morphologically in fossilization. The detection of flavonoids suggests that the leaves of G. coriacea experienced a mild post-depositional environment during their fossilization. This appears to be the oldest occurrence of flavonoids in plant fossils. |
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Keywords: | constituents Cretaceous fossil Ginkgo biloba Ginkgo coriacea palaeophytochemistry |
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