Geochemical Fingerprints of Ginkgoales Across the Triassic-Jurassic Boundary of Greenland
Premise of research. Geochemical fingerprinting of fossil plants is a relatively new research field complementing morphological analyses and providing information for paleoenvironmental interpretations. Ginkgoales contains a single extant species but was diverse through the Mesozoic and is an excell...
Published in: | International Journal of Plant Sciences |
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Naturhistoriska riksmuseet, Enheten för paleobiologi
2021
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Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-4336 https://doi.org/10.1086/715506 |
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ftnrm:oai:DiVA.org:nrm-4336 2023-05-15T16:29:00+02:00 Geochemical Fingerprints of Ginkgoales Across the Triassic-Jurassic Boundary of Greenland Vajda, Vivi Pucetaite, Milda Steinthorsdottir, Margret 2021 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-4336 https://doi.org/10.1086/715506 eng eng Naturhistoriska riksmuseet, Enheten för paleobiologi Department of Geology, Lund University, Sweden Centre for Environmental and Climate Science, Lund University Bolin Centre for Climate Research, Stockholm University Chicago International journal of plant sciences, 1058-5893, 2021, 182:7, s. 649-662 orcid:0000-0003-2987-5559 orcid:0000-0002-7893-1142 http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-4336 doi:10.1086/715506 info:eu-repo/semantics/openAccess paleobotany Ginkgo chemotaxonomy proteins CO2 climate Biochemistry and Molecular Biology Biokemi och molekylärbiologi Geosciences Multidisciplinary Multidisciplinär geovetenskap Biophysics Biofysik Botany Botanik Other Earth and Related Environmental Sciences Annan geovetenskap och miljövetenskap Article in journal info:eu-repo/semantics/article text 2021 ftnrm https://doi.org/10.1086/715506 2021-12-16T17:17:02Z Premise of research. Geochemical fingerprinting of fossil plants is a relatively new research field complementing morphological analyses and providing information for paleoenvironmental interpretations. Ginkgoales contains a single extant species but was diverse through the Mesozoic and is an excellent target for biochemical analyses. Methodology. Cuticles derived from fresh and fallen autumn leaves of extant Ginkgo biloba and seven fossil gink- goalean leaf taxa, one seed fern taxon, and two taxa with bennettitalean affinity were analyzed by infrared (IR) microspec- troscopy at the D7 beamline in the MAX IV synchrotron laboratory, Sweden. The fossil material derives from Triassic and Jurassic successions of Greenland. Spectral data sets were compared and evaluated by hierarchical cluster analysis (HCA) and principal component analysis performed on vector-normalized, first-derivative IR absorption spectra. Pivotal results. The IR absorption spectra of the fossil leaves all reveal signatures that clearly indicate the pres- ence of organic compounds. Spectra of the extant G. biloba leaves reveal the presence of aliphatic chains, aromatic and ester carbonyl functional groups from polymer cutin and other waxy compounds, and polysaccharides. Inter- estingly, both the extant autumn leaves and the fossil specimens reveal the presence of carboxyl/ketone molecules, suggesting that chemical alterations during the initial stages of decomposition are preserved through fossilization. Two major subclusters were identified through HCA of the fossil spectra. Conclusions. Consistent chemical IR signatures, specific for each fossil taxon are present in cuticles, and suf- ficient molecular content is preserved in key regions to reflect the plants’ original chemical signatures. The alter- ations of the organic compounds are initiated as soon as the leaves are shed, with loss of proteins and increased ester and carboxyl/ketone compound production in the fallen leaves. We further show that the groupings of taxa reflect a combination of phylogeny and environmental conditions related to the end-Triassic event. Also funded by a Utrecht NetworkYoung Researchers grant to M. Pucetaite Article in Journal/Newspaper Greenland Swedish Museum of Natural History: Publications (DiVA) Greenland International Journal of Plant Sciences 182 7 649 662 |
institution |
Open Polar |
collection |
Swedish Museum of Natural History: Publications (DiVA) |
op_collection_id |
ftnrm |
language |
English |
topic |
paleobotany Ginkgo chemotaxonomy proteins CO2 climate Biochemistry and Molecular Biology Biokemi och molekylärbiologi Geosciences Multidisciplinary Multidisciplinär geovetenskap Biophysics Biofysik Botany Botanik Other Earth and Related Environmental Sciences Annan geovetenskap och miljövetenskap |
spellingShingle |
paleobotany Ginkgo chemotaxonomy proteins CO2 climate Biochemistry and Molecular Biology Biokemi och molekylärbiologi Geosciences Multidisciplinary Multidisciplinär geovetenskap Biophysics Biofysik Botany Botanik Other Earth and Related Environmental Sciences Annan geovetenskap och miljövetenskap Vajda, Vivi Pucetaite, Milda Steinthorsdottir, Margret Geochemical Fingerprints of Ginkgoales Across the Triassic-Jurassic Boundary of Greenland |
topic_facet |
paleobotany Ginkgo chemotaxonomy proteins CO2 climate Biochemistry and Molecular Biology Biokemi och molekylärbiologi Geosciences Multidisciplinary Multidisciplinär geovetenskap Biophysics Biofysik Botany Botanik Other Earth and Related Environmental Sciences Annan geovetenskap och miljövetenskap |
description |
Premise of research. Geochemical fingerprinting of fossil plants is a relatively new research field complementing morphological analyses and providing information for paleoenvironmental interpretations. Ginkgoales contains a single extant species but was diverse through the Mesozoic and is an excellent target for biochemical analyses. Methodology. Cuticles derived from fresh and fallen autumn leaves of extant Ginkgo biloba and seven fossil gink- goalean leaf taxa, one seed fern taxon, and two taxa with bennettitalean affinity were analyzed by infrared (IR) microspec- troscopy at the D7 beamline in the MAX IV synchrotron laboratory, Sweden. The fossil material derives from Triassic and Jurassic successions of Greenland. Spectral data sets were compared and evaluated by hierarchical cluster analysis (HCA) and principal component analysis performed on vector-normalized, first-derivative IR absorption spectra. Pivotal results. The IR absorption spectra of the fossil leaves all reveal signatures that clearly indicate the pres- ence of organic compounds. Spectra of the extant G. biloba leaves reveal the presence of aliphatic chains, aromatic and ester carbonyl functional groups from polymer cutin and other waxy compounds, and polysaccharides. Inter- estingly, both the extant autumn leaves and the fossil specimens reveal the presence of carboxyl/ketone molecules, suggesting that chemical alterations during the initial stages of decomposition are preserved through fossilization. Two major subclusters were identified through HCA of the fossil spectra. Conclusions. Consistent chemical IR signatures, specific for each fossil taxon are present in cuticles, and suf- ficient molecular content is preserved in key regions to reflect the plants’ original chemical signatures. The alter- ations of the organic compounds are initiated as soon as the leaves are shed, with loss of proteins and increased ester and carboxyl/ketone compound production in the fallen leaves. We further show that the groupings of taxa reflect a combination of phylogeny and environmental conditions related to the end-Triassic event. Also funded by a Utrecht NetworkYoung Researchers grant to M. Pucetaite |
format |
Article in Journal/Newspaper |
author |
Vajda, Vivi Pucetaite, Milda Steinthorsdottir, Margret |
author_facet |
Vajda, Vivi Pucetaite, Milda Steinthorsdottir, Margret |
author_sort |
Vajda, Vivi |
title |
Geochemical Fingerprints of Ginkgoales Across the Triassic-Jurassic Boundary of Greenland |
title_short |
Geochemical Fingerprints of Ginkgoales Across the Triassic-Jurassic Boundary of Greenland |
title_full |
Geochemical Fingerprints of Ginkgoales Across the Triassic-Jurassic Boundary of Greenland |
title_fullStr |
Geochemical Fingerprints of Ginkgoales Across the Triassic-Jurassic Boundary of Greenland |
title_full_unstemmed |
Geochemical Fingerprints of Ginkgoales Across the Triassic-Jurassic Boundary of Greenland |
title_sort |
geochemical fingerprints of ginkgoales across the triassic-jurassic boundary of greenland |
publisher |
Naturhistoriska riksmuseet, Enheten för paleobiologi |
publishDate |
2021 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-4336 https://doi.org/10.1086/715506 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_relation |
International journal of plant sciences, 1058-5893, 2021, 182:7, s. 649-662 orcid:0000-0003-2987-5559 orcid:0000-0002-7893-1142 http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-4336 doi:10.1086/715506 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1086/715506 |
container_title |
International Journal of Plant Sciences |
container_volume |
182 |
container_issue |
7 |
container_start_page |
649 |
op_container_end_page |
662 |
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1766018691587112960 |