Journal ArticleDOI
Establishing a time-scale for plant evolution
TLDR
A post-Jurassic origin of angiosperms and a post-Cambrian origin of land plants are rejected, and it is suggested that the establishment of the major embryophyte lineages occurred at a much slower tempo than suggested in most previous studies.Abstract:
• Plants have utterly transformed the planet, but testing hypotheses of causality requires a reliable time-scale for plant evolution. While clock methods have been extensively developed, less attention has been paid to the correct interpretation and appropriate implementation of fossil data. • We constructed 17 calibrations, consisting of minimum constraints and soft maximum constraints, for divergences between model representatives of the major land plant lineages. Using a data set of seven plastid genes, we performed a cross-validation analysis to determine the consistency of the calibrations. Six molecular clock analyses were then conducted, one with the original calibrations, and others exploring the impact on divergence estimates of changing maxima at basal nodes, and prior probability densities within calibrations. • Cross-validation highlighted Tracheophyta and Euphyllophyta calibrations as inconsistent, either because their soft maxima were overly conservative or because of undetected rate variation. Molecular clock analyses yielded estimates ranging from 568-815 million yr before present (Ma) for crown embryophytes and from 175-240 Ma for crown angiosperms. • We reject both a post-Jurassic origin of angiosperms and a post-Cambrian origin of land plants. Our analyses also suggest that the establishment of the major embryophyte lineages occurred at a much slower tempo than suggested in most previous studies. These conclusions are entirely compatible with current palaeobotanical data, although not necessarily with their interpretation by palaeobotanists.read more
Citations
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Journal ArticleDOI
Origin of angiosperms and the puzzle of the Jurassic gap
Hong-Tao Li,Ting-Shuang Yi,Lian-Ming Gao,Peng-Fei Ma,Ting Zhang,Jun-Bo Yang,Matthew A. Gitzendanner,Matthew A. Gitzendanner,Peter W. Fritsch,Jie Cai,Yang Luo,Hong Wang,Michelle van der Bank,Shu-Dong Zhang,Qing-Feng Wang,Jian Wang,Zhirong Zhang,Chao-Nan Fu,Jing Yang,Peter M. Hollingsworth,Mark W. Chase,Mark W. Chase,Douglas E. Soltis,Pamela S. Soltis,Pamela S. Soltis,De-Zhu Li +25 more
TL;DR: A study reconstructed angiosperm phylogeny on the basis of plastome data representing 2,351 angiosperm and 187 gymnosperm species, and dated the origin of crown angiosperms to be significantly earlier than the estimates based on fossil data.
Journal ArticleDOI
The genome of the seagrass Zostera marina reveals angiosperm adaptation to the sea
Jeanine L. Olsen,Pierre Rouzé,Bram Verhelst,Yao-Cheng Lin,Till Bayer,Jonas Collén,Emanuela Dattolo,Emanuele De Paoli,Simon M. Dittami,Florian Maumus,Gurvan Michel,Anna R. Kersting,Anna R. Kersting,Chiara Lauritano,Rolf Lohaus,Mats Töpel,Thierry Tonon,Kevin Vanneste,Mojgan Amirebrahimi,Janina Brakel,Christoffer Boström,Mansi Chovatia,Jane Grimwood,Jerry Jenkins,Alexander Jueterbock,Amy Mraz,Wytze T. Stam,Hope Tice,Erich Bornberg-Bauer,Pamela J. Green,Gareth A. Pearson,Gabriele Procaccini,Carlos M. Duarte,Jeremy Schmutz,Thorsten B. H. Reusch,Thorsten B. H. Reusch,Yves Van de Peer,Yves Van de Peer +37 more
TL;DR: The genome of Zostera marina, the first, to the authors' knowledge, marine angiosperm to be fully sequenced, reveals unique insights into the genomic losses and gains involved in achieving the structural and physiological adaptations required for its marine lifestyle.
Journal ArticleDOI
Testing the Impact of Calibration on Molecular Divergence Times Using a Fossil-Rich Group: The Case of Nothofagus (Fagales)
Hervé Sauquet,Simon Y. W. Ho,Simon Y. W. Ho,Maria A. Gandolfo,Gregory J. Jordan,Peter Wilf,David J. Cantrill,Michael J. Bayly,Lindell Bromham,Gillian K. Brown,Gillian K. Brown,Raymond J. Carpenter,Daphne M. Lee,Daniel J. Murphy,J. M. Kale Sniderman,Frank Udovicic +15 more
TL;DR: It is suggested that increased background research should be made at all stages of the calibration process to reduce errors wherever possible, from verifying the geochronological data on the fossils to critical reassessment of their phylogenetic position.
Journal ArticleDOI
Analysis of 41 plant genomes supports a wave of successful genome duplications in association with the Cretaceous-Paleogene boundary
TL;DR: It is argued that considering the evolutionary potential of polyploids in light of the environmental and ecological conditions present around the time ofpolyploidization could mitigate the stark contrast in the proposed evolutionary fates of Polyploids.
Journal ArticleDOI
Sensitivity of plants to changing atmospheric CO2 concentration: From the geological past to the next century
Peter J. Franks,Mark A. Adams,Jeffrey S. Amthor,Margaret M. Barbour,Joseph A. Berry,David S. Ellsworth,Graham D. Farquhar,Oula Ghannoum,Jon Lloyd,Jon Lloyd,Nate G. McDowell,Richard J. Norby,David T. Tissue,Susanne von Caemmerer +13 more
TL;DR: Overall, the sensitivity of plants to rising or falling c(a) is qualitatively similar across all scales considered, and is characterised by an adaptive feedback response that tends to maintain 1 - c(i)/c(a), the relative gradient for CO(2) diffusion into the leaf, relatively constant.
References
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Journal ArticleDOI
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TL;DR: PAML, currently in version 4, is a package of programs for phylogenetic analyses of DNA and protein sequences using maximum likelihood (ML), which can be used to estimate parameters in models of sequence evolution and to test interesting biological hypotheses.
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Relaxed Phylogenetics and Dating with Confidence
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