Fossilized nuclei and chromosomes reveal 180 millionyears of genomic stasis in Royal Ferns
2014 (English)In: Science, ISSN ISSN 0036-8075, Vol. 343, 1376-1377 p.Article in journal (Refereed) Published
Rapidly permineralized fossils can provide exceptional insights into the evolution of life over geological time. Here, we present an exquisitely preserved, calcified stem of a royal fern (Osmundaceae) from Early Jurassic lahar deposits of Sweden in which authigenic mineral precipitation from hydrothermal brines occurred so rapidly that it preserved cytoplasm, cytosol granules, nuclei, and even chromosomes in various stages of cell division. Morphometric parameters of interphase nuclei match those of extant Osmundaceae, indicating that the genome size of these reputed “living fossils” has remained unchanged over at least 180 million years—a paramount example of evolutionary stasis.
Place, publisher, year, edition, pages
2014. Vol. 343, 1376-1377 p.
Fossilization; permineralization; Early Jurassic; palynology; organelles
Research subject The changing Earth
IdentifiersURN: urn:nbn:se:nrm:diva-315DOI: 10.1126/science.1249884OAI: oai:DiVA.org:nrm-315DiVA: diva2:719316
FunderSwedish Research Council, 2010-3931