Results 1 to 10 of about 4,971 (156)

Transcriptome analyses to investigate symbiotic relationships between marine protists. [PDF]

Frontiers in Microbiology, 2015
Rhizaria are an important component of oceanic plankton communities worldwide. A number of species harbour eukaryotic microalgal symbionts, which are horizontally acquired in the environment at each generation.
Sergio eBalzano, Erwan eCorre, Johan eDecelle, Roberto eSierra, Patrick eWincker, Corinne eDa Silva, Julie ePoulain, Jan ePawlowski, Fabrice eNot   +8 more
doaj   +10 more sources

Siliceous Rhizaria abundances and diversity in the Mediterranean Sea assessed by combined imaging and metabarcoding approaches

Frontiers in Marine Science, 2022
Siliceous Rhizaria (polycystine radiolarians and phaeodarians) are significant contributors to carbon and silicon biogeochemical cycles. Considering their broad taxonomic diversity and their wide size range (from a few micrometres up to several ...
Natalia Llopis Monferrer, Tristan Biard, Fabien Lombard   +2 more
exaly   +3 more sources

Phylogenomic tree of Cercozoa based on single-cell transcriptomes from 100 uncultured cells [PDF]

BMC Biology
Background Cercozoa are single-celled eukaryotes (protists) and are part of the supergroup Rhizaria. Cercozoans have vastly different morphologies and are defined by their phylogenetic affinity.
Gordon Lax, Elizabeth C. Cooney, Vasily Zlatogursky, Mahara Mtawali, Noriko Okamoto, Victoria K. L. Jacko-Reynolds, Saelin Bjornson, Corey Holt, Vedprakash G. Hurdeal, Daniele Giannotti, Patrick J. Keeling   +10 more
doaj   +2 more sources

Meiosis-associated expression patterns during starvation-induced cell fusion in the protist Fisculla terrestris [PDF]

BMC Biology
Background Unicellular eukaryotes were widely considered to r eproduce without sex. However, recent findings suggest that meiosis, and by extension (sometimes cryptic) sexual reproduction, might be present in almost all eukaryotic lineages. Results Here,
Shan Gao, Marcel Dominik Solbach, Jens Bast, Kenneth Dumack   +3 more
doaj   +2 more sources

Global census of the significance of giant mesopelagic protists to the marine carbon and silicon cycles [PDF]

Nature Communications
Thriving in both epipelagic and mesopelagic layers, Rhizaria are biomineralizing protists, mixotrophs or flux-feeders, often reaching gigantic sizes.
Manon Laget, Laetitia Drago, Thelma Panaïotis, Rainer Kiko, Lars Stemmann, Andreas Rogge, Natalia Llopis-Monferrer, Aude Leynaert, Jean-Olivier Irisson, Tristan Biard   +9 more
doaj   +2 more sources

Comparative genomics of Ascetosporea gives new insight into the evolutionary basis for animal parasitism in Rhizaria [PDF]

BMC Biology
Background Ascetosporea (Endomyxa, Rhizaria) is a group of unicellular parasites infecting aquatic invertebrates. They are increasingly being recognized as widespread and important in marine environments, causing large annual losses in invertebrate ...
Markus Hiltunen Thorén, Ioana Onuț-Brännström, Anders Alfjorden, Hana Pecková, Fiona Swords, Chantelle Hooper, Astrid S. Holzer, David Bass, Fabien Burki   +8 more
doaj   +2 more sources

The persistent homology of mitochondrial ATP synthases

iScience, 2023
Summary: Relatively little is known about ATP synthase structure in protists, and the investigated ones exhibit divergent structures distinct from yeast or animals.
Savar D. Sinha, Jeremy G. Wideman
doaj   +1 more source

Phylogenomics reshuffles the eukaryotic supergroups. [PDF]

PLoS ONE, 2007
Resolving the phylogenetic relationships between eukaryotes is an ongoing challenge of evolutionary biology. In recent years, the accumulation of molecular data led to a new evolutionary understanding, in which all eukaryotic diversity has been ...
Fabien Burki, Kamran Shalchian-Tabrizi, Marianne Minge, Asmund Skjaeveland, Sergey I Nikolaev, Kjetill S Jakobsen, Jan Pawlowski   +6 more
doaj   +1 more source

Deep ocean particle flux in the Northeast Atlantic over the past 30 years: carbon sequestration is controlled by ecosystem structure in the upper ocean

Frontiers in Earth Science, 2023
The time series of downward particle flux at 3000 m at the Porcupine Abyssal Plain Sustained Observatory (PAP-SO) in the Northeast Atlantic is presented for the period 1989 to 2018.
R. S. Lampitt, N. Briggs, B. B. Cael, B. Espinola, P. Hélaouët, S. A. Henson, F. Norrbin, C. A. Pebody, D. Smeed   +8 more
doaj   +1 more source

Experimental evidence for enzymatic cell wall dissolution in a microbial protoplast feeder (Orciraptor agilis, Viridiraptoridae)

BMC Biology, 2022
Background Several protists have evolved the ability to perforate the cell walls of algae and fungi to specifically feed on their cell contents. These phagotrophic “protoplast feeders” represent an interesting mechanistic intermediate between predators ...
Jannika Moye, Tobias Schenk, Sebastian Hess   +2 more
doaj   +1 more source