Cretaceous gnetalean yields first preserved plant gum
- Author(s)
- Emily A. Roberts, Leyla J. Seyfullah, Robert F. Loveridge, Paul Garside, David M. Martill
- Abstract
Some liquid plant exudates (e.g. resin) can be found preserved in the fossil record. However, due to their high solubility, gums have been assumed to dissolve before fossilisation. The visual appearance of gums (water-soluble polysaccharides) is so similar to other plant exudates, particularly resin, that chemical testing is essential to differentiate them. Remarkably, Welwitschiophyllum leaves from Early Cretaceous, Brazil provide the first chemical confirmation of a preserved gum. This is despite the leaves being exposed to water twice during formation and subsequent weathering of the Crato Formation. The Welwitschiophyllum plant shares the presence of gum ducts inside leaves with its presumed extant relative the gnetalean Welwitschia. This fossil gum presents a chemical signature remarkably similar to the gum in extant Welwitschia and is distinct from those of fossil resins. We show for the first time that a water-soluble plant exudate has been preserved in the fossil record, potentially allowing us to recognise further biomolecules thought to be lost during the fossilisation process.
- Organisation(s)
- Department of Palaeontology
- External organisation(s)
- University of Portsmouth, The British Library
- Journal
- Scientific Reports
- Volume
- 10
- Pages
- 3401
- No. of pages
- 1
- ISSN
- 2045-2322
- DOI
- https://doi.org/10.1038/s41598-020-60211-2
- Publication date
- 02-2020
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 106008 Botany, 105117 Palaeobotany
- Keywords
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/cretaceous-gnetalean-yields-first-preserved-plant-gum(0e4c99ed-318a-4abb-afd0-c77f212cd37e).html