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Seven new species of Oculatella (Pseudanabaenales, Cyanobacteria): taxonomically recognizing cryptic diversification
This report is the first to use solely molecular criteria to distinguish cryptic species of cyanobacteria using molecular characters in the genus Oculatella from all four soil taxa.
Controls on Distribution Patterns of Biological Soil Crusts at Micro- to Global Scales
Biological soil crusts (biocrusts) are heterogeneously distributed in space, and the drivers of their distribution depend on the spatial scale of observation. Globally, there are about 1544…
Roholtiella , gen. nov. (Nostocales, Cyanobacteria)—a tapering and branching cyanobacteria of the family Nostocaceae
Four new species within the genus Roholtiella are described, which are easily distinguished based on the sequence of the 16S-23S ITS regions, in particular the flanking regions to the conserved Box-B and V3 helices.
Komarekiella atlantica gen. et sp. nov. (Nostocaceae, Cyanobacteria): a new subaerial taxon from the Atlantic Rainforest and Kauai, Hawaii
- J. Johansen, Guilherme S Hentschke, N. Pietrasiak, J. Rigonato, M. F. Fiore, C. L. Sant’anna
- 20 September 2017
Six strains of Cyanobacteria sampled in the Brazilian Atlantic rainforest and one strain from Kauai, Hawaii, were studied using morphological and molecular approaches, including 16S rRNA gene phylogenies and 16S-23S ITS secondary structures, and show that these strains are close to nostocacean strains, in strongly supported clades and separated from all other genera.
The diatom flora and cyanobacteria from caves on Kauai, Hawaii
Revision of the Synechococcales (Cyanobacteria) through recognition of four families including Oculatellaceae fam. nov. and Trichocoleaceae fam. nov. and six new genera containing 14 species
- Truc Mai, J. Johansen, N. Pietrasiak, M. Bohunická, Michael P. Martin
- 16 August 2018
Phylogenetic analysis of the 16S rRNA gene data and Bayesian inference of a large Synechococcales alignment was in agreement with the phylogeny based on the rpoC1 gene for 59 OTU’s, indicating that the large family-level grouping formerly classified as the Leptolyngbyaceae could be further divided into four family- level clades.
Biogeomorphology of a Mojave Desert landscape — Configurations and feedbacks of abiotic and biotic land surfaces during landform evolution
Geologic composition influences distribution of microbiotic crusts in the Mojave and Colorado Deserts at the regional scale
Iron Oxide and Titanium Dioxide Nanoparticle Effects on Plant Performance and Root Associated Microbes
- D. Burke, N. Pietrasiak, A. Samia
- Biology, MedicineInternational journal of molecular sciences
- 1 October 2015
The results indicate that the type of NP can affect plant growth and nutrient content in an agriculturally important crop species, and that the charge of these particles influences the colonization of the root system by nitrogen-fixing bacteria.
Biodiversity of soil cyanobacteria in the hyper‐arid Atacama Desert, Chile
- D. Patzelt, Ladislav Hodač, T. Friedl, N. Pietrasiak, J. Johansen
- Biology, Environmental ScienceJournal of phycology
- 1 August 2014
The cyanobacterial diversity of soils of the Atacama Desert (Chile) was investigated using 16S rRNA gene cloning/sequencing directly from soil samples and unialgal cultures, revealing a high diversity of phylotypes, among which are likely both new genera and new species awaiting characterization and description.