| Literature DB >> 15105500 |
Jaap S Sinninghe Damsté1, Gerard Muyzer, Ben Abbas, Sebastiaan W Rampen, Guillaume Massé, W Guy Allard, Simon T Belt, Jean-Michel Robert, Steven J Rowland, J Michael Moldowan, Silvana M Barbanti, Frederick J Fago, Peter Denisevich, Jeremy Dahl, Luiz A F Trindade, Stefan Schouten.
Abstract
The 18S ribosomal DNA molecular phylogeny and lipid composition of over 120 marine diatoms showed that the capability to biosynthesize highly branched isoprenoid (HBI) alkenes is restricted to two specific phylogenetic clusters, which independently evolved in centric and pennate diatoms. The molecular record of C25 HBI chemical fossils in a large suite of well-dated marine sediments and petroleum revealed that the older cluster, composed of rhizosolenid diatoms, evolved 91.5 +/- 1.5 million years ago (Upper Turonian), enabling an accurate dating of the pace of diatom evolution that is unprecedented. The rapid rise of the rhizosolenid diatoms probably resulted from a major reorganization of the nutrient budget in the mid-Cretaceous oceans, triggered by plate tectonics.Entities:
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Year: 2004 PMID： 15105500 DOI： 10.1126/science.1096806
Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728