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The Genome of the Diatom Thalassiosira Pseudonana: Ecology, Evolution, and Metabolism
TLDR
It is identified novel genes for silicic acid transport and formation of silica-based cell walls, high-affinity iron uptake, biosynthetic enzymes for several types of polyunsaturated fatty acids, use of a range of nitrogenous compounds, and a complete urea cycle, all attributes that allow diatoms to prosper in aquatic environments.
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.
A common red algal origin of the apicomplexan, dinoflagellate, and heterokont plastids
TLDR
These findings support a relatively simple path of linear descent for the evolution of photosynthesis in a large proportion of algae and emphasize plastid loss in several lineages (e.g., ciliates, Cryptosporidium, and Phytophthora).
A photosynthetic alveolate closely related to apicomplexan parasites
TLDR
This corrects the article to say that the author of the paper is a post-graduate student at the Massachusetts Institute of Technology (MIT) and the article was originally written by a PhD student.
Evolutionary and geographical history of the Leishmania donovani complex with a revision of current taxonomy
TLDR
A new taxonomy is proposed, in which Leishmania infantum and L.Donovani are the only recognized species of the L. donovani complex, and an evolutionary hypothesis for the origin and dispersal of the species is presented.
Evolution and metabolic significance of the urea cycle in photosynthetic diatoms
TLDR
It is shown that the exosymbiont-derived ornithine-urea cycle, which is similar to that of metazoans but is absent in green algae and plants, facilitates rapid recovery from prolonged nitrogen limitation and represents a key pathway for anaplerotic carbon fixation into nitrogenous compounds that are essential for diatom growth and for the contribution of diatoms to marine productivity.
Chromerid genomes reveal the evolutionary path from photosynthetic algae to obligate intracellular parasites
TLDR
Insight is provided into how obligate parasites with diverse life strategies arose from a once free-living phototrophic marine alga, and co-regulated with genes encoding the flagellar apparatus supporting the functional contribution of flagella to the evolution of invasion machinery.
Evolutionary Origins and Functions of the Carotenoid Biosynthetic Pathway in Marine Diatoms
TLDR
The ancient origins of several components of the carotenoid biosynthesis pathway in photosynthetic eukaryotes are revealed and information about how they have diversified and acquired new functions in the diatoms is provided to demonstrate that they are differentially regulated by light.
Algal genomes reveal evolutionary mosaicism and the fate of nucleomorphs
TLDR
The nuclear genomes of the cryptophyte Guillardia theta and the chlorarachniophyte Bigelowiella natans are sequenced and extensive genetic and biochemical mosaicism is revealed, with both host- and endosymbiont-derived genes servicing the mitochondrion, the host cell cytosol, the plastid and the remnant endosYmbionT cytOSol of both algae.
A photosynthetic alveolate closely related to apicomplexan parasites
TLDR
A newly cultured organism that has ultrastructural features typical for alveolates, is phylogenetically related to apicomplexans, and contains a photosynthetic plastid that shares an origin with the apicoplasts is described.
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