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“Imperfections and oddities” in the origin of the nucleus

“Imperfections and oddities” in the origin of the nucleus
“Imperfections and oddities” in the origin of the nucleus
We outline a plausible evolutionary sequence that led from prokaryotes to the origin of the first nucleated cell. The nucleus is postulated to evolve after the archaebacterium and eubacterium merged to form the symbiotic ancestor of amitochondriate protists. Descendants of these amitochondriate cells (archaeprotists) today thrive in organic-rich anoxic habitats where they are amenable to study. Eukaryosis, the origin of nucleated cells, occurred by the middle Proterozoic Eon prior to the deposition in sediments of well-preserved microfossils such as Vandalosphaeridium and the spiny spheres in the Doushantou cherts of China.
0094-8373
175-191
Margulis, Lynn
faca8923-0319-40ba-a7ef-c78b1f7cb9ea
Dolan, Michael F.
c64cc9ec-9950-44a0-8fce-104cb05a00ff
Whiteside, Jessica H.
5d9ad7aa-eba3-4ad9-9f6f-81be71b6829b
Margulis, Lynn
faca8923-0319-40ba-a7ef-c78b1f7cb9ea
Dolan, Michael F.
c64cc9ec-9950-44a0-8fce-104cb05a00ff
Whiteside, Jessica H.
5d9ad7aa-eba3-4ad9-9f6f-81be71b6829b

Margulis, Lynn, Dolan, Michael F. and Whiteside, Jessica H. (2005) “Imperfections and oddities” in the origin of the nucleus. Paleobiology, 31, supplement 2, Spring Issue, 175-191. (doi:10.1666/0094-8373(2005)031[0175:IAOITO]2.0.CO;2).

Record type: Article

Abstract

We outline a plausible evolutionary sequence that led from prokaryotes to the origin of the first nucleated cell. The nucleus is postulated to evolve after the archaebacterium and eubacterium merged to form the symbiotic ancestor of amitochondriate protists. Descendants of these amitochondriate cells (archaeprotists) today thrive in organic-rich anoxic habitats where they are amenable to study. Eukaryosis, the origin of nucleated cells, occurred by the middle Proterozoic Eon prior to the deposition in sediments of well-preserved microfossils such as Vandalosphaeridium and the spiny spheres in the Doushantou cherts of China.

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More information

Published date: 2005
Organisations: Paleooceanography & Palaeoclimate

Identifiers

Local EPrints ID: 354774
URI: http://eprints.soton.ac.uk/id/eprint/354774
DOI: doi:10.1666/0094-8373(2005)031[0175:IAOITO]2.0.CO;2
ISSN: 0094-8373
PURE UUID: bebb91c2-c9ea-4a12-8dc8-adfb19f9dc3f

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Date deposited: 19 Jul 2013 10:49
Last modified: 14 Mar 2024 14:24

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Contributors

Author: Lynn Margulis
Author: Michael F. Dolan
Author: Jessica H. Whiteside

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