Nucleus? Insights from Photosynthetic Eukaryotes What Was the Real Contribution of Endosymbionts to the Eukaryotic Subject Collection The Origin and Evolution of Eukaryotes from Fossils and Molecular Clocks On the Age of Eukaryotes: Evaluating Evidence
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چکیده
Phylogenomic Perspective The Archaeal Legacy of Eukaryotes: A Lionel Guy, Jimmy H. Saw and Thijs J.G. Ettema Splicing Origin of Spliceosomal Introns and Alternative Manuel Irimia and Scott William Roy How Natural a Kind Is ''Eukaryote?'' W. Ford Doolittle Eukaryotic Epigenetics and Geochemistry on the Provenance of Imprints of Bacterial Biochemical Diversification Protein and DNA Modifications: Evolutionary
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Evolution of viruses and cells: do we need a fourth domain of life to explain the origin of eukaryotes?
The recent discovery of diverse very large viruses, such as the mimivirus, has fostered a profusion of hypotheses positing that these viruses define a new domain of life together with the three cellular ones (Archaea, Bacteria and Eucarya). It has also been speculated that they have played a key role in the origin of eukaryotes as donors of important genes or even as the structures at the origi...
متن کاملWhat was the real contribution of endosymbionts to the eukaryotic nucleus? Insights from photosynthetic eukaryotes.
Eukaryotic genomes are composed of genes of different evolutionary origins. This is especially true in the case of photosynthetic eukaryotes, which, in addition to typical eukaryotic genes and genes of mitochondrial origin, also contain genes coming from the primary plastids and, in the case of secondary photosynthetic eukaryotes, many genes provided by the nuclei of red or green algal endosymb...
متن کاملHuman Virome
Viruses are dominant entities in the biosphere and parasitize all cellular life forms. The relative abundances of different classes of viruses are dramatically different between prokaryotes and eukaryotes. In marine, soil and animal-associated environments, virus particles consistently outnumber cells by one to two orders of magnitude. It is estimated that 10 quintillion (1030) viral particles ...
متن کاملA molecular timeline for the origin of photosynthetic eukaryotes.
The appearance of photosynthetic eukaryotes (algae and plants) dramatically altered the Earth's ecosystem, making possible all vertebrate life on land, including humans. Dating algal origin is, however, frustrated by a meager fossil record. We generated a plastid multi-gene phylogeny with Bayesian inference and then used maximum likelihood molecular clock methods to estimate algal divergence ti...
متن کاملThe effect of Melatonin pretreatment on growth responses and enhancement of the enzymatic antioxidant system in Chlorella vulgaris under stress of ionizing radiation
Melatonin as a compound made by photosynthetic organizers protects them against many environmental stresses. Modulating mechanisms of melatonin, as a protector are not well known in early eukaryotes, such as algae. In this research, the effect of melatonin pre-treatment on evaluating Chlorella vulgaris resistance to gamma ionizing radiation was investigated. The results showed that 100 µM conce...
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