Results 81 to 90 of about 14,854 (216)

A potential cyanobacterial ancestor of Viridiplantae chloroplasts [PDF]

, 2011
The theory envisaging the origin of plastids from endosymbiotic cyanobacteria is well-established but it is difficult to explain the evolution (spread) of plastids in phylogenetically diverse plant groups.
Jaideb Chatterjee, Masrure Alam, Prabir Haldar, Prosenjit Pyne, Sabyasachi Bhattacharya, Wriddhiman Ghosh   +5 more
core   +1 more source

Microbial signature of pediatric Crohn's disease: Differentiation from functional gastrointestinal disorders and relationship with increased disease activity

Physiological Reports, Volume 14, Issue 1, January 2026.
Abstract The prevalence and incidence of Crohn's disease (CD) in pediatric populations have been steadily increasing. Growing evidence suggests that gut microbiomal community differences play a critical role in the pathogenesis of CD. Additionally, the clinical course of patients with CD is unpredictable, making treatment decisions challenging.
Jeremiah Levine, Scott C. Thomas, Fangxi Xu, Adam Isbiroglu, Ryan Zanganeh, Lauren Barazani, Mridula Vardhan, Samantha Hwang, Julia Kishanie Persaud, Nirali Thakor, Shelly Joseph, Leonardo Trasande, Deepak Saxena   +12 more
wiley   +1 more source

Assessing SSU rDNA Barcodes in Foraminifera: A Case Study using Bolivina quadrata

Journal of Eukaryotic Microbiology, 2017
AbstractThe Small Subunit Ribosomal RNA gene (SSU rDNA) is a widely used tool to reconstruct phylogenetic relationships among foraminiferal species. Recently, the highly variable regions of this gene have been proposed as DNA barcodes to identify foraminiferal species. However, the resolution of these barcodes has not been well established, yet.
Chiara Borrelli, Yubo Hou, Jan W. Pawlowski, Maria Holzmann, Miriam E. Katz, G. Thomas Chandler, Samuel S. Bowser   +6 more
openaire   +3 more sources

Systematic position of Discocephalus-like ciliates (Ciliophora: Spirotrichea) inferred from SSU rDNA and ontogenetic information [PDF]

INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY, 2008
The Prodiscocephalus-like ciliates, or discocephalines, are cephalized organisms that are traditionally considered to be hypotrichs (sensu lato) but whose precise systematic position has long been uncertain. The main reasons for this are that these organisms exhibit several intermediate morphological and morphogenetic features and that hitherto none ...
Chen, Shao, Weibo, Song, Lifang, Li, Alan, Warren, Khaled A S, Al-Rasheid, Saleh A, Al-Quraishy, Saleh A, Al-Farraj, Xiaofeng, Lin   +7 more
openaire   +2 more sources

Testing ecological theories with sequence similarity networks: marine ciliates exhibit similar geographic dispersal patterns as multicellular organisms [PDF]

, 2015
International audienceBackground : High-throughput sequencing technologies are lifting major limitations to molecular-based ecological studies of eukaryotic microbial diversity, but analyses of the resulting millions of short sequences remain a major ...
Dominik Forster, Eric Bapteste, Lucie Bittner, Micah Dunthorn, Philippe Lopez, Sarah Romac, Slim Karkar, Stéphane Audic, Thorsten Stoeck   +8 more
core   +3 more sources

Broad Ecological Niche in Seashore Lichens Emerges From a Stable, Selective Association With Generalist Algal Symbionts

Ecology and Evolution, Volume 15, Issue 12, December 2025.
In mutualistic symbioses, partner flexibility often broadens the host ecological niche. We found a stable association between littoral lichens and their algal symbionts along a natural salinity gradient, suggesting that the broad ecological niche can be facilitated by association with a single generalist symbiont.
Ivana Černajová, Jana Schmidtová, Ulf Schiefelbein, Francesco Dal Grande, Pavel Škaloud   +4 more
wiley   +1 more source

Evolution of multicellularity in Dictyostelia [PDF]

, 2019
The well-orchestrated multicellular life cycle of Dictyostelium discoideum has fascinated biologists for over a century. Self-organisation of its amoebas into aggregates, migrating slugs and fruiting structures by pulsatile cAMP signalling and their ...
Du, Qingyou, Kawabe, Yoshinori, Schaap, Pauline, Schilde, Christina   +3 more
core   +2 more sources

The diverse diet of southern Alaska resident killer whales shifts across spatiotemporally distinct foraging hotspots

Ecosphere, Volume 16, Issue 12, December 2025.
Abstract Top predators influence ecological communities in part through the prey they consume. Prey preferences often shift throughout the year, reflecting both seasonal and geographic patterns of habitat use and the relative abundance of preferred prey species.
Hannah J. Myers, Daniel W. Olsen, Amy M. Van Cise, Abigail H. Wells, Kim M. Parsons, Craig O. Matkin   +5 more
wiley   +1 more source

Spatial Heterogeneity in Methane Biogeochemistry and Prokaryotic Community Structure in Sub‐Arctic Waterbodies in Northern Canada

Environmental Microbiology, Volume 27, Issue 12, December 2025.
Prokaryotic communities and methane dynamics differed markedly across 16 sub‐Arctic waterbodies. Maximum depth and permafrost thaw emerged as key drivers, with non‐stratified thaw‐affected sites hosting distinct communities and elevated methane fluxes, highlighting their potential role as emerging hotspots of methane emissions.
Arthur Szylit, Urania Christaki, Maialen Barret, Léa Cabrol, Laure Gandois, Antoine Sejourne, Frédéric Bouchard, Sarah Ollivier, Ludwig Jardillier   +8 more
wiley   +1 more source

Pcr Primers for the Amplification of Mitochondrial Small Subunit Ribosomal DNA of Lichen-forming Ascomycetes [PDF]

, 2017
Four primers for the amplification of mitochondrial DNA of lichenforming ascomycetes are presented. The primers match the conserved regions U2, U4, and U6, respectively, of mitochondrial small subunit (SSU) ribosomal DNA (rDNA). Polymerase chain reaction
Scheidegger, Christoph, Sperisen, Christoph, Zoller, Stefan   +2 more
core