Showing papers in "Protist in 2016"

TL;DR: This work proposes a new functional grouping of planktonic protists in an eco-physiological context and incorporates these functional groups within a foodweb structure and shows that there is scope for significant changes in trophic dynamics depending on the protist functional type description.

TL;DR: This investigation provides further evidence that the distribution and transmission of Leucocytozoon species in the Neotropics are influenced by elevation, with the highest prevalence between 2,400 and 3,200 m asl.

TL;DR: Insight is provided into the PPC ultrastructure and perspectives on the function of this residual cytoplasm of red algal origin are opened.

TL;DR: Using small-subunit ribosomal RNA gene phylogeny, this work could confirm the phylogenetic position of the genus Lecythium among the Cercozoa where it groups closely to Pseudodifflugiidae (Tectofilosida).

TL;DR: Novel information is provided on the morphology and genetic variability of an Australian trypanosome within the T. cruzi clade using phylogenetic inferences from three gene regions coupled with morphological and behavioural observations in vitro.

TL;DR: New ultrastructural data and phylogenies based on SSU rDNA sequences using the type species of archigregarines using the Selenidiidae Selenidium pendula are provided, revealing a characteristic nuclear multiplication with centrocones, cryptomitosis, filamentous network of chromatin, a cyst wall secretion and a 9+0 flagellar axoneme of the male gamete.

TL;DR: The marine benthic heterotrophic flagellate (HF) morphospecies are less concordant with the MEM predictions but closer to the Ubiquity model than other (larger) protists.

TL;DR: The results support the biospecies concept, derived from experiments with cultivable members of the Physarales, and discuss the background of possible reproductive options in myxomycetes.

TL;DR: Based on the phylogenetic affiliation and ecological characteristics of this alga as well as the priority rule of nomenclature, the genus Protoeuglena is reinstate and the endosymbiont is reclassified as ProtoeUGlena noctilucae.

TL;DR: This study directly shows for the first time that amoeba cysts can be conserved not only for years and decades but for many thousand years and then recover, contributing to the formation of an active microbial community.

TL;DR: The taxon-level results indicate that heterotrophic flagellates do not form a homogenous trophic guild, as often assumed in pelagic food web studies, and instead formed a "food web within the food web".

TL;DR: This study corrects the LSU rDNA sequence of P. brassicae and demonstrates that the newly generated sequence belongs to the causal agent of clubroot disease.

TL;DR: The presence of cysts in the genus Lecythium is reported and those to the cysts of the presumed closely related Chlamydophrys stercorea are compared and it is suggested that still many undescribed LECythium species will be found in terrestrial and freshwater habitats.

TL;DR: In this review, currently used and potentially useful species concepts (biological, morphological, phylogenetic and ecological) are reviewed, and an integrated approach to resolve the myxomycete species problem is discussed.

TL;DR: Through molecular phylogeny analysis of small subunit rRNA, internal transcribed spacer (ITS), and large subunit (LSU) rRNA sequence, it is found P. koreanum to be more closely related to P. mexicanum and P. rhathymum than toP.

TL;DR: It appears that cell coverings were ancestrally organic, then silicified independently on two occasions and after that multiple cases of desilicification or even complete loss of coverings took place, so, in the two centrohelid orders the evolution includes similar sequences of parallel events.

TL;DR: A new marine phototrophic species, Paulinella longichromatophora sp.

TL;DR: The data suggests that filament-forming proteins of protists other than actin and tubulin share common structural properties with metazoan intermediate filament proteins, while not being homologous, and highlights the diverse nature of eukaryotic proteins with the ability to form unique cytoskeletal filaments.

TL;DR: Phylogenetic analyses of SSU sequences reveal that Kraken are core (filosan) Cercozoa, branching weakly at the base of the cercomonad radiation, most closely related to Paracercomonas, Metabolomonas, and Brevimastigomonas.

TL;DR: The capability of T. copemani G2 to infect cells may have important consequences for pathogenicity and suggests it might employ similar strategies to complete its life cycle in the vertebrate host to those seen in T. cruzi.

TL;DR: A large contingent of 'non-native' species, which are in a global context largely considered part of the loricate choanoflagellate warm water community, occurred in September 2014 samples from the Baltic Sea entrance, i.e. the Sound between Denmark and Sweden.

TL;DR: Interestingly, the distribution pattern for H3K9me3, generally linked to heterochromatin formation, was very similar to the distribution observed with the euchromatin marks, suggesting that this modification could be involved in transcriptional activation of rRNA genes in L. major.

TL;DR: The sequences of the algal DNA fragments were identical for any given host species throughout the collection period, thus it is concluded that these four ciliates stably retain their algae over long term.

TL;DR: This work comprehensively characterized CL2 (NY0171) in order to understand the ultrastructural traits in this lineage, especially the organization of the microtubular root system (i.e., the flagellar apparatus), and established a new genus and species, Aduncisulcus paluster gen. et sp.

TL;DR: Preliminary phylogenetic analyses show that the dinoflagellates contain at least three cyclin-dependent kinase (CDK) homologs (belonging to the CDK1, CDK5 and CDK8 families), and that the dineroflagesate cyclins belong exclusively to the A/B type, which suggests that dinofLagellate CDKs likely play a limited role outside regulation of the cell cycle.

TL;DR: It is shown that many apicoplast transcripts are polycistronic and that there is extensive RNA processing, often involving the excision of tRNA molecules, and major RNA processing sites are identified, and these are associated with a conserved sequence motif.

TL;DR: It appears that microtubules are involved in the shell construction process in P. chromatophora, which was observed to be at an early stage of scale production because silicon was detected within SDVs containing immature scales.

TL;DR: The results show that maltose release is regulated by light and cellular conditions in endosymbiotic Chlorella, and suggests that the photosynthetic pathway probably participates in maltoseRelease.

TL;DR: It is concluded that the two RIC paralogs have different roles in T. vaginalis, with RIC2 showing an unprecedented DNA binding ability when compared with all other until now studied RICs.