In this study, we describe , a newly identified diatom species found in the highly alkaline Lake Van in Eastern Turkey (Türkiye). This new species is characterized morphologically by light and scanning electron microscopy, performed on both wild and cultivated samples. Two monoclonal cultures were submitted to a genome-skimming approach, giving access to the complete sequence of their nuclear rRNA cluster of genes, mitochondrial and plastid genomes. Both strains were highly similar from the genomic point of view, with few mutations noted, although in organellar genomes some of them concerned protein coding genes and were non-silent. Also, the group II intron in the mitochondrial gene was found to display a relatively high number of polymorphisms. The plastome also distinguishes itself from other spp. by the extension of its inverted repeat at the expense of the two single copy regions of the genome. Maximum likelihood molecular phylogeny inferred from a concatenated three genes dataset , and ) positions this species within the K clade, which is known to contain hypersaline to freshwater species.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11584902 | PMC |
http://dx.doi.org/10.3897/phytokeys.249.133205 | DOI Listing |
Nature
December 2024
CNRS, Sorbonne Université, Institut de Biologie Physico-Chimique, Laboratoire de Biologie du Chloroplaste et Perception de la Lumière chez les Microalgues, UMR7141, Paris, France.
Aquatic life is strongly structured by the distribution of light, which, besides attenuation in intensity, exhibits a continuous change in the spectrum with depth. The extent to which these light changes are perceived by phytoplankton through photoreceptors is still inadequately known. We addressed this issue by integrating functional studies of diatom phytochrome (DPH) photoreceptors in model species with environmental surveys of their distribution and activity.
View Article and Find Full Text PDFACS Appl Bio Mater
December 2024
Department of Civil and Environmental Engineering, Utah State University, Logan, Utah 84322, United States.
Dye-contaminated wastewater poses serious environmental risks to ecosystems and human health. Diatoms, algae with nanoporous frustules (cell walls), offer promising potential for wastewater remediation due to their high surface area and adsorption properties. While dead diatom biomass is well-studied for biosorption, research on living diatoms' bioaccumulation and biotransformation potential is limited, with gaps in kinetic and equilibrium modeling of dye adsorption.
View Article and Find Full Text PDFMolecular data is provided firstly for the newly erected genus Qinia, and the phylogenetic position of the genus Qinia within the Cymbellales is discussed. Despite the presence of apical pore fields bisected by the distal raphe fissure being a very distinctive feature for Qinia, molecular analysis demonstrates this character as homoplasious, having evolved independently in Qinia and Cymbella. Two new species, Qinia hubeii sp.
View Article and Find Full Text PDFEnviron Sci Technol
December 2024
Department of Biology, McGill University, Montréal H3A 1B1, Canada.
We examined the bioavailability of synthetic organic Cu complexes (Cu-L) and inorganic Cu species (Cu') to growing under Cu-limiting and Cu-inhibiting conditions. Copper bioavailability depended on the phytoplankton Cu nutritional state and whether Cu' diffusion to the cell surface was sufficient to meet the cellular demands for growth. Under Cu-limiting conditions when [Cu'] was less than the diffusion concentration threshold (DCT: 10 M), growth rate was a hyperbolic function of [Cu-L].
View Article and Find Full Text PDFSci Total Environ
December 2024
Department of Biology and GeoBioTec - GeoBioSciences, GeoTechnologies and GeoEngineering Research Centre, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!