Étude du génome chloroplastique des algues vertes de la classe Chlorophyceae

Authors: Vincent, Antony
Advisor: Lemieux, ClaudeTurmel, Monique
Abstract: The unicellular algae class Chlorophyceae is notably studied for its economic potential for biofuel production. The first taxonomy of this class was made with the advent of electron microscopy and subsequently with molecular phylogenies. This lineage is divided into two groups: OCC (Oedogoniales + Chaetophorales + Chaetopeltidales) and CS (Chlamydomonadales + Sphaeropleales). There are deep uncertainties about the phylogenetic positions of the organisms at the base of the CS group. To strengthen the phylogeny of these organisms, the chloroplast genomes sequences of five basal algae were obtained by Roche 454 pyrosequencing . A phylogenetic analysis of sixty-nine chloroplast protein sequences revealed that three of these five organisms, listed in the order Chlamydomonadales by the current literature, are in fact basal in the order Sphaeropleales. This phylogenetic reclassification involves a new hypothesis on the evolution of flagellar bodies.
Document Type: Mémoire de maîtrise
Issue Date: 2014
Open Access Date: 24 April 2018
Permalink: http://hdl.handle.net/20.500.11794/26790
Grantor: Université Laval
Collection:Thèses et mémoires

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