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The Marine Microbial Eukaryote Transcriptome Sequencing Project (MMETSP): Illuminating the Functional Diversity of Eukaryotic Life in the Oceans through Transcriptome Sequencing
TLDR
This Community Page describes a resource of 700 transcriptomes from marine microbial eukaryotes to help understand their role in the world's oceans.
The Phaeodactylum genome reveals the evolutionary history of diatom genomes
TLDR
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
TLDR
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.
Genomic Footprints of a Cryptic Plastid Endosymbiosis in Diatoms
TLDR
Using a genome-wide approach to estimate the “green” contribution to diatoms, it is identified >1700 green gene transfers, constituting 16% of the diatom nuclear coding potential.
High-resolution SAR11 ecotype dynamics at the Bermuda Atlantic Time-series Study site by phylogenetic placement of pyrosequences
TLDR
The high-resolution phylogenetic analyses performed herein highlight significant, previously unknown, patterns of evolutionary diversification, within perhaps the most widely distributed heterotrophic marine bacterial clade, and strongly links to ecosystem regimes.
Ribosomal DNA sequence variation among sympatric strains of the Cyclotella meneghiniana complex (Bacillariophyceae) reveals cryptic diversity.
TLDR
The random distribution of ITS variation within four genetically distinct--apparently reproductively isolated--groups indicated that the genetic structure in Cyclotella meneghiniana can probably be explained by the presence of cryptic sexual species rather than by the lack of allogamous sexual reproduction.
The model marine diatom Thalassiosira pseudonana likely descended from a freshwater ancestor in the genus Cyclotella
TLDR
P phylogenetic criteria are used to show that T. pseudonana is more appropriately classified by its original name, Cyclotella nana, which contains a mix of marine and freshwater species and so more accurately conveys the complexities of the phylogenetic and natural histories of T. Pseudonana.
Utility of Amplified Fragment Length Polymorphisms (AFLP) to analyse genetic structures within the Alexandrium tamarense species complex.
TLDR
The results suggest that AFLPs can provide useful information at the population level using clonal samples from a certain bloom, whereas the amount of variation that is found is too high to allow for meaningful comparisons of a few strains collected from different localities at different time points even though they belong to one geographic clade.
PHENOTYPIC VARIATION AND GENOTYPIC DIVERSITY IN A PLANKTONIC POPULATION OF THE TOXIGENIC MARINE DINOFLAGELLATE ALEXANDRIUM TAMARENSE (DINOPHYCEAE) 1
TLDR
Multiple clonal isolates from a geographic population of Alexandrium tamarense and Balech from the North Sea exhibited high genotypic and phenotypic variation, interpreted as evidence for lack of strong selective pressure on respective Phenotypic traits at the time the population was sampled.
Average genome size: a potential source of bias in comparative metagenomics
TLDR
The influence of average genome-size differences on comparative analyses is illustrated, and it is suggested that average genome sizes can be estimated from the metagenomic data themselves, and taken into account in comparative analyses, to enable ecologically more meaningful comparisons.
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