Sökning: WFRF:(Turner C.)
> (2005-2009) >
Embryo fossilizatio...
Embryo fossilization is a biological process mediated by microbial biofilms
-
- Raff, Elizabeth C. (författare)
- Department of Biology and Indiana Molecular Biology Institute, Indiana University, Bloomington, IN
-
- Schollaert, Kaila L. (författare)
- Department of Biology and Indiana Molecular Biology Institute, Indiana University, Bloomington, IN
-
- Nelson, David E. (författare)
- Department of Biology and Indiana Molecular Biology Institute, Indiana University, Bloomington, IN
-
visa fler...
-
- Donoghue, Philip C. J. (författare)
- Department of Earth Sciences, University of Bristol, Bristol BS8 1RJ, United Kingdom
-
- Thomas, Ceri-Wyn (författare)
- Department of Earth Sciences, University of Bristol, Bristol BS8 1RJ, United Kingdom
-
- Turner, F. Rudolf (författare)
- Department of Biology and Indiana Molecular Biology Institute, Indiana University, Bloomington, IN
-
- Stein, Barry D. (författare)
- Department of Biology and Indiana Molecular Biology Institute, Indiana University, Bloomington, IN
-
- Dong, Xiping (författare)
- Department of Earth and Space Sciences, Peking University, Beijing 100871, Peoples Republic of China
-
- Bengtson, Stefan (författare)
- Department of Palaeozoology, Swedish Museum of Natural History, SE-104 05 Stockholm, Sweden
-
- Huldtgren, Therese (författare)
- Stockholms universitet,Institutionen för geologi och geokemi,Department of Geology and Geochemistry, Stockholm University, SE-106 91 Stockholm, Sweden
-
visa färre...
-
(creator_code:org_t)
- 2008
- 2008
- Engelska.
-
Ingår i: Proceedings of the National Academy of Sciences. ; 105:49, s. 19360-19365
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://urn.kb.se/re...
-
visa färre...
Abstract
Ämnesord
Stäng
- Fossilized embryos with extraordinary cellular preservation appear in the Late Neoproterozoic and Cambrian, coincident with the appearance of animal body fossils. It has been hypothesized that microbial processes are responsible for preservation and mineralization of organic tissues. However, the actions of microbes in preservation of embryos have not been demonstrated experimentally. Here, we show that bacterial biofilms assemble rapidly in dead marine embryos and form remarkable pseudomorphs in which the bacterial biofilm replaces and exquisitely models details of cellular organization and structure. The experimental model was the decay of cleavage stage embryos similar in size and morphology to fossil embryos. The data show that embryo preservation takes place in 3 distinct steps: (i) blockage of autolysis by reducing or anaerobic conditions, (ii) rapid formation of microbial biofilms that consume the embryo but form a replica that retains cell organization and morphology, and (iii) bacterially catalyzed mineralization. Major bacterial taxa in embryo decay biofilms were identified by using 16S rDNA sequencing. Decay processes were similar in different taphonomic conditions, but the composition of bacterial populations depended on specific conditions. Experimental taphonomy generates preservation states similar to those in fossil embryos. The data show how fossilization of soft tissues in sediments can be mediated by bacterial replacement and mineralization, providing a foundation for experimentally creating biofilms from defined microbial species to model fossilization as a biological process.
Ämnesord
- NATURVETENSKAP -- Biologi -- Evolutionsbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Evolutionary Biology (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas
- Av författaren/redakt...
-
Raff, Elizabeth ...
-
Schollaert, Kail ...
-
Nelson, David E.
-
Donoghue, Philip ...
-
Thomas, Ceri-Wyn
-
Turner, F. Rudol ...
-
visa fler...
-
Stein, Barry D.
-
Dong, Xiping
-
Bengtson, Stefan
-
Huldtgren, There ...
-
visa färre...
- Om ämnet
-
- NATURVETENSKAP
-
NATURVETENSKAP
-
och Biologi
-
och Evolutionsbiolog ...
- Artiklar i publikationen
- Proceedings of t ...
- Av lärosätet
-
Uppsala universitet
-
Stockholms universitet