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Unexpected diversity of small eukaryotes in deep-sea Antarctic plankton
TLDR
Using ribosomal RNA genes from marine picoplankton, several new groups of bacteria and archaea have been identified, some of which are abundant and related to dinoflagellates that are found at all studied depths and suggest a radiation early in the evolution of alveolates.
Global dispersal and ancient cryptic species in the smallest marine eukaryotes.
TLDR
It is illustrated that global dispersal of a picoeukaryote is possible in oceans, but this does not imply a reduced species number and it is shown that the morphospecies concept is untenable because it overlooks a large genetic and species diversity and may lead to incorrect biological assumptions.
Autochthonous eukaryotic diversity in hydrothermal sediment and experimental microcolonizers at the Mid-Atlantic Ridge
TLDR
A molecular survey based on 18S ribosomal RNA genes of eukaryotes present in different hydrothermal niches at the Mid-Atlantic Ridge identified considerable phylogenetic diversity, both at kingdom level and within kinetoplastids and alveolates.
Metagenomics of the Deep Mediterranean, a Warm Bathypelagic Habitat
TLDR
The comparison of metagenomic libraries from the deep Mediterranean and the Pacific ALOHA water column showed that bathypelagic Mediterranean communities resemble more mesopelagic communities in the Pacific, and suggests that, in the absence of light, temperature is a major stratifying factor in the oceanic water column, overriding pressure at least over 4000 m deep.
An updated view of kinetoplastid phylogeny using environmental sequences and a closer outgroup: proposal for a new classification of the class Kinetoplastea.
TLDR
A new classification of the class Kinetoplastea is proposed based on the results of the phylogenetic analysis presented, which supports the monophyly of groups that very often emerged as polyphyletic in the trees rooted using the traditional, distant outgroup sequences.
The early evolution of lipid membranes and the three domains of life
TLDR
The implications of recent phylogenomic studies suggesting that the cenancestor did possess complex phospholipid membranes for membrane evolution in archaea and bacteria and for the origin of the eukaryotic cell are discussed.
Diversity of functional genes of methanogens, methanotrophs and sulfate reducers in deep-sea hydrothermal environments.
TLDR
This study provides for the first time an insight into the diversity of several functional genes of deep-sea hydrothermal system microorganisms as well as the existence of novel lineages in the three functional groups.
Bacterial diversity in hydrothermal sediment and epsilonproteobacterial dominance in experimental microcolonizers at the Mid-Atlantic Ridge.
TLDR
A molecular survey based on 16S rRNA genes of the bacterial diversity found in two deep-sea vent niches at the Mid-Atlantic Ridge shows that microcolonizers were almost exclusively colonized by epsilonproteobacteria, although these exhibited considerable morphological and phylogenetic in-group diversity.
Origins and early evolution of the mevalonate pathway of isoprenoid biosynthesis in the three domains of life.
TLDR
The MVA pathway is likely an ancestral metabolic route in all the three domains of life, and hence, it was probably present in the last common ancestor of all organisms (the cenancestor), and open the possibility that the cenANCestor had membranes containing isoprenoids.
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