The Phaeodactylum genome reveals the evolutionary history of diatom genomes
- C. Bowler, A. Allen, I. Grigoriev
- 13 November 2008
Analysis of molecular divergence compared with yeasts and metazoans reveals rapid rates of gene diversification in diatoms, and documents the presence of hundreds of genes from bacteria, likely to provide novel possibilities for metabolite management and for perception of environmental signals.
The Ectocarpus genome and the independent evolution of multicellularity in brown algae
- J. Cock, L. Sterck, P. Wincker
- 3 June 2010
The Ectocarpus genome sequence represents an important step towards developing this organism as a model species, providing the possibility to combine genomic and genetic approaches to explore these and other aspects of brown algal biology further.
Whole-cell response of the pennate diatom Phaeodactylum tricornutum to iron starvation
- A. Allen, J. LaRoche, C. Bowler
- Environmental ScienceProceedings of the National Academy of Sciences
- 29 July 2008
This work has explored the biochemical strategies preferred by Phaeo dactylum tricornutum at growth-limiting levels of dissolved Fe and found that this retrenchment is compensated by nitrogen (N) and carbon (C) reallocation from protein and carbohydrate degradation, adaptations to chlorophyll biosynthesis and pigment metabolism, and augmented Fe-independent oxidative stress responses.
Genome structure and metabolic features in the red seaweed Chondrus crispus shed light on evolution of the Archaeplastida
- J. Collén, Betina M. Porcel, C. Boyen
- BiologyProceedings of the National Academy of Sciences
- 15 March 2013
An evolutionary scenario involving an ancestral red alga that was driven by early ecological forces to lose genes, introns, and intergenetic DNA is proposed; this loss was followed by an expansion of genome size as a consequence of activity of transposable elements.
Genome-Wide Transcriptome Analyses of Silicon Metabolism in Phaeodactylum tricornutum Reveal the Multilevel Regulation of Silicic Acid Transporters
- G. Sapriel, Michelle Quinet, P. Lopez
- Biology, Environmental SciencePLoS ONE
- 14 October 2009
Global analyses revealed that about one fourth of the differentially expressed genes are organized in clusters, underlying a possible evolution of P. tricornutum genome, and perhaps other pennate diatoms, toward a better optimization of its response to variable environmental stimuli.
Multiparametric Analyses Reveal the pH-Dependence of Silicon Biomineralization in Diatoms
- Vincent Hervé, J. Derr, S. Douady, Michelle Quinet, L. Moisan, P. Lopez
- Environmental SciencePLoS ONE
- 29 October 2012
It is shown that external pH influences cell growth of the ubiquitous diatom Thalassiosira weissflogii, and modifies intracellular silicic acid and biogenic silica contents per cell, and indicates that the kinetics of valve morphogenesis, at least in the early stages, depends on pH.
Digital expression profiling of novel diatom transcripts provides insight into their biological functions
- U. Maheswari, K. Jabbari, C. Bowler
- BiologyGenome Biology
- 25 August 2010
The digital gene expression database represents a new resource for identifying candidate diatom-specific genes involved in processes of major ecological relevance and facilitating studies of gene function, genome annotation and the molecular basis of species diversity.
Plasticity and robustness of pattern formation in the model diatom Phaeodactylum tricornutum.
- M. Vartanian, J. Desclés, Michelle Quinet, S. Douady, P. Lopez
- BiologyNew Phytologist
- 1 April 2009
Investigation of the spatial and temporal development of siliceous structures found in a model diatom species, Phaeodactylum tricornutum, reveals that the process of silicification starts from a 'pi-like' structure that controls the spatial organization of a sternum upon which regular instabilities are initiated and developed.
Biogenic Silica Patterning: Simple Chemistry or Subtle Biology?
- T. Coradin, P. Lopez
- 4 April 2003
Biogenicsilic has been studied with regard to diversity of species that achieve this biomineralization process, and at the level of diversityinthemorphology ofsilicastructures.
Mimicking biogenic silica nanostructures formation
- P. Lopez, Clémentine Gautier, J. Livage, T. Coradin
Biomineralization processes are now fully recognized as inspiring systems for the design of new materials. In the case of silica, the formation of diatom shell or sponge spicule has attracted much…