FTIR characterisation of the chemical composition of Silurian miospores (cryptospores and trilete spores) from Gotland, Sweden
| Autor: | Kevin Lepot, Philippe Steemans, Craig P. Marshall, Alain Le Hérissé, Emmanuelle Javaux |
|---|---|
| Přispěvatelé: | NFSR Research associate, Université de Liège, Department of Geology, University of Kansas [Lawrence] (KU), Domaines Océaniques (LDO), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2010 |
| Předmět: |
010506 paleontology
Embryophyte 010502 geochemistry & geophysics 01 natural sciences chemistry.chemical_compound Fourier transform infrared Sporopollenin Botany Cryptospores Fourier transform infrared spectroscopy Methylene Chemical composition Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences Sweden biology cryptospore Paleontology biology.organism_classification Affinities Spore Crystallography trilete spore chemistry [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology embryophyte Silurian |
| Zdroj: | Review of Palaeobotany and Palynology Review of Palaeobotany and Palynology, Elsevier, 2010, 162 (4), pp.577-590. ⟨10.1016/j.revpalbo.2010.07.006⟩ |
| ISSN: | 0034-6667 |
| DOI: | 10.1016/j.revpalbo.2010.07.006 |
| Popis: | International audience; To better understand the biological affinities of cryptospores, micro-FTIR (Fourier transform infrared) spectroscopy analysis has been carried out on isolated specimens from the Upper Silurian of Gotland. The geobiochemical results have been compared to spectra of trilete spores, chitinozoans and leiospheres from the same sample. The palynomorphs are all very well preserved as attested by their pale yellow to orange colour indicative of a low thermal maturity. Micro-FTIR spectroscopy indicates that cryptospores display very similar spectra to those of the trilete spores, which are composed of sporopollenin characterised by absorption bands from aliphatic C–H in methylene (CH2) and methyl (CH3) groups, aromatic (C=C and C–H) groups and C=O groups of carboxylic acids. The sporopollenin composition of the cryptospore wall observed here is additional evidence demonstrating the embryophytic affinity of the cryptospores. In addition, several variations in other bands in the spectra of the different miospore morphospecies are evidenced and may be linked to their biological affinity or palaeoecological history. |
| Databáze: | OpenAIRE |
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