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Growth modes of 2-Ga microfossils

Published online by Cambridge University Press:  20 May 2016

Steven Bennett ,
David Boal  and
Hanna Ruotsalainen
Steven Bennett
Affiliation:
Department of Physics, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada. E-mail: [email protected]
David Boal*
Affiliation:
Department of Physics, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada. E-mail: [email protected]
Hanna Ruotsalainen
Affiliation:
Department of Physics, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada. E-mail: [email protected]
*
∗ Corresponding author
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Abstract

By digitally imaging colonies with more than a hundred cells, the distributions of cell size and shape are determined for four examples of 2-Ga microfossils: bacillus-shaped Eosynechococcus moorei and three dyads or diplococci (Sphaerophycus parvum and two forms of Eoentophysalis belcherensis). By assuming that each colony obeys steady-state growth, the measured distributions can be inverted to infer the time evolution of the individual cell shape. The time evolution can also be predicted analytically from rate-based models of cell growth, permitting the data to distinguish among different postulates for the physical principles governing growth. The cell cycles are found to be best described by the exponential growth of cell volume, although linear volume growth is not ruled out. However, the measured dyad cycles are inconsistent with several growth models based on surface area or the behavior of the septum at the division plane. Where they have been measured, modern bacilli obey exponential growth whereas eukaryotics obey linear growth, which implies that these 2-Ga microfossils are likely prokaryotic.

Type
Articles
Information
Paleobiology , Volume 33 , Issue 3 , Summer 2007 , pp. 382 - 396
Copyright
Copyright © The Paleontological Society

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References

Literature Cited

Barghoorn, E. S. and Tyler, S. A. 1965. Microorganisms from the Gunflint chert. Science 147: 563–577.Google Scholar
Biron, D., Alvarez-Lacalle, E., Tlusty, T., and Moses, E. 2005. A molecular model of the contractile ring. Physical Review Letters 95: 098102.Google Scholar
Boal, D. H. 2002. Mechanics of the cell. Cambridge University Press, Cambridge.Google Scholar
Bramhill, D. 1997. Bacterial cell division. Annual Reviews of Cell and Developmental Biology 13: 395–424.Google Scholar
Collins, J. F. and Richmond, M. H. 1962. Rate of growth of between divisions. Journal of General Microbiology 28: 15–33.Google Scholar
Fryer, B. 1972. Age determinations in the Circum-Ungava geosyncline and the evolution of Precambrian iron-formations. Canadian Journal of Earth Sciences 9: 652–663.Google Scholar
Furnes, H., Banerjee, N. R., Muehlenbachs, K., Staudigel, H., and de Wit, M. 2004. Early life recorded in Archean pillow lavas. Science 304: 578–581.Google Scholar
Golubic, S. and Hofmann, H. J. 1976. Comparison of modern and mid-Precambrian Entophysalidaceae (Cyanophyta) in stromatolitic algal mats: cell division and degradation. Journal of Paleontology 50: 1074–1082.Google Scholar
Grotzinger, J. P., Watters, W. A., and Knoll, A. H. 2000. Calcified metazoans in thrombolite-stromatolite reefs of the terminal Proterozoic Nama Group, Namibia. Paleobiology 26: 334–359.Google Scholar
Hall, M. N., Raff, M., and Thomas, G. eds. 2004. Cell growth: control of cell size. Cold Spring Harbor Laboratory Press, Cold Spring Harbor, N.Y.Google Scholar
Hofmann, H. J. 1975. Stratiform Precambrian stromatolites, Belcher Islands, Canada: relations between silicified microfossils and microstructure. American Journal of Science 275: 1121–1132.Google Scholar
Hofmann, H. J. 1976. Precambrian microflora, Belcher Islands, Canada: significance and systematics. Journal of Paleontology 50: 1040–1073.Google Scholar
Killander, D. and Zetterberg, A. 1965. A quantitative cytochemical investigation of the relationship between cell mass and initiation of DNA synthesis in mouse fibroblasts in vitro. Experimental Cell Research 40: 12–20.Google Scholar
Knoll, A. H. and Barghoorn, E. S. 1976. A Gunflint-type microbiota from the Duck Creek Dolomite, Western Australia. Origins of Life 7: 417–423.Google Scholar
Knoll, A. H. and Barghoorn, E. S. 1977. Archean microfossils showing cell division from the Swaziland System of South Africa. Science 198: 396–398.Google Scholar
Koch, A. L. 1983. The surface stress theory of microbial morphogenesis. Advances in Microbial Physiology 24: 301–366.Google Scholar
Koch, A. L. and Schaechter, M. 1962. A model for statistics of the cell division process. Journal of General Microbiology 29: 435–454.Google Scholar
Koppes, L. J H. and Nanninga, N. 1980. Positive correlation between size at initiation of chromosome replication in and size at initiation of cell constriction. Journal of Bacteriology 143: 89–99.Google Scholar
Mojzsis, S. J., Arrhenius, G., McKeegan, K. D., Harrison, T. M., Nutman, A. P., and Friend, C. R L. 1996. Evidence for life on Earth before 3,800 million years ago. Nature 384: 55–59.Google Scholar
Moore, E. S. 1918. The iron formation on Belcher Islands, Hudson Bay, with special reference to its origin and its associated algal limestones. Journal of Geology 26: 412–438.Google Scholar
Murray, A. and Hunt, T. 1993. The cell cycle: an introduction. Oxford University Press, Oxford.Google Scholar
Rasmussen, B. 2000. Filamentous microfossils in a 3,235-million-year-old volcanogenic massive sulphide deposit. Nature 405: 676–679.Google Scholar
Rosenberger, R. F., Grover, N. B., Zaritsky, A., and Woldringh, C. L. 1978. Surface growth in rod-shaped bacteria. Journal of Theoretical Biology 73: 711–721.Google Scholar
Rosing, M. T. 1999. 13C-depleted carbon microparticles in >3700 Ma sea-floor sedimentary rocks from West Greenland. Science 283: 674–676.3700+Ma+sea-floor+sedimentary+rocks+from+West+Greenland.+Science+283:+674–676.>Google Scholar
Schidlowski, M. 1988. A 3,800-million-year isotopic record of life from carbon in sedimentary rocks. Nature 333: 313–318.Google Scholar
Schopf, J. W. 1993. Microfossils of the Early Archean Apex chert: new evidence of the antiquity of life. Science 260: 640–646.Google Scholar
Schopf, J. W. and Packer, B. M. 1987. Early Archean (3.3-billion to 3.5 billion-year-old) microfossils from Warrawoona Group, Australia. Science 237: 70–73.Google Scholar
Sharpe, M. E., Hauser, P. M., Sharpe, R. G., and Errington, J. 1998. cell cycle as studied by fluorescence microscopy: constancy of cell length at initiation of DNA replication and evidence for active nucleoid partitioning. Journal of Bacteriology 180: 547–555.Google Scholar
Shen, Y., Canfield, D., and Buick, R. 2001. Isotopic evidence for microbial sulphate reduction in the early Archean ocean. Nature 410: 77–81.Google Scholar
Smith, R. E. 1968. Grain size measurement in thin section and in grain mount: reply to comment by Sahu. Journal of Sedimentary Research 38: 268–271.Google Scholar
Timofeev, B. V. 1979. Mikrofitossilii Pechenskoi serii. pp. 119–120in Sokolov, B. V., ed. Paleontologiya dokembriya i rannega Kembriya. Nauka, Leningrad.Google Scholar
van Zuilen, M. A., Lepland, A., and Arrhenius, G. 2002. Reassessing the evidence for the earliest traces of life. Nature 418: 627–630.Google Scholar
Walsh, M. M. and Lowe, D. R. 1985. Filamentous microfossils from the 3,500-Myr-old Onverwacht Group, Barberton Mountain Land, South Africa. Nature 314: 530–532.Google Scholar
Xaio, S. 2002. Mitotic topologies and mechanics of Neoproterozoic algae and animal embryos. Paleobiology 28: 244–250.Google Scholar