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Molecular signature...
Molecular signatures of fossil leaves provideunexpected new evidence for extinct plant relationships
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- Vajda, Vivi (författare)
- Swedish Museum of Natural History,Lund University,Lunds universitet,Naturhistoriska riksmuseet,Enheten för paleobiologi,Department of Geology, Lund University, Sweden,Berggrundsgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Lithosphere and Biosphere Science,Faculty of Science
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- Pucetaite, Milda (författare)
- Department of General Physics and Spectroscopy, Vilnius University, LT-102 57 Vilnius, Lithuania
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- McLoughlin, Stephen, 1964- (författare)
- Swedish Museum of Natural History,Naturhistoriska riksmuseet,Enheten för paleobiologi
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- Engdahl, Anders (författare)
- Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory
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- Heimdal, Jimmy (författare)
- Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory
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- Uvdal, Per (författare)
- Lund University,Lunds universitet,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
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(creator_code:org_t)
- 2017-07-03
- 2017
- Engelska.
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Ingår i: Nature Ecology and Evolution. - London : Springer Nature. - 2397-334X. ; 1, s. 1093-1099
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Gene sequences form the primary basis for understanding the relationships among extant plant groups, but genetic data are unavailable from fossils to evaluate the affinities of extinct taxa. Here we show that geothermally resistant fossil cuticles of seed-bearing plants, analysed with Fourier transform infrared (FTIR) spectroscopy and hierarchical cluster analysis (HCA), retain biomolecular suites that consistently distinguish major taxa even after experiencing different diagenetic histories. Our results reveal that similarities between the cuticular biochemical signatures of major plant groups (extant and fossil) are mostly consistent with recent phylogenetic hypotheses based on molecular and morphological data. Our novel chemotaxonomic data also support the hypothesis that the extinct Nilssoniales and Bennettitales are closely allied, but only distantly related to Cycadales. The chemical signature of the cuticle of Czekanowskia (Leptostrobales) is strongly similar to that of Ginkgo leaves and supports a close evolutionary relationship between these groups. Finally, our results also reveal that the extinct putative araucariacean, Allocladus, when analysed through HCA, is grouped closer to Ginkgoales than to conifers. Thus, in the absence of modern relatives yielding molecular information, FTIR spectroscopy provides valuable proxy biochemical data complementing morphological characters to distinguish fossil taxa and to help elucidate extinct plant relationships.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Annan geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Other Earth and Related Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
Nyckelord
- Fourier transform infrared spectroscopy
- fossil leaves
- cuticle
- chemistry
- hierarchical cluster analysis
- Mesozoic
- gymnosperms
- Ecosystems and species history
- Ekosystem och arthistoria
- Biogeochemistry Biological techniques Evolution Palaeontology
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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