Molecular and morphological investigations of two new species in Qinia and Cymbella (Bacillariophyceae: Cymbellales) from China.

Molecular 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.

Nomenclature and systematics of two species (Bacillariophyta) from Lake Baikal: and .

The study provides nomenclatural history, morphological characteristics and taxonomy of and described by B.V. Skvortzov from Lake Baikal.

Biochemical and Antioxidant Characteristics of (Chlorophyceae, Chlorophyta) under Various Cultivation Conditions.

The functional state of enrichment cultures of the Chlorophycean strain CAMU MZ-Ch4 under various cultivation conditions was studied. Experiments with different aeration conditions, cultivation durations, and nitrogen and phosphorus concentrations in the medium were carried out to evaluate the growth dynamics of the strain and its biochemical characteristics. The contents of chlorophylls, carotenoids, proteins, lipids, retinol, α-tocopherol, ascorbic acid, phenolic compounds, lipid peroxidation products, antioxidant enzymes (glutathione peroxidase, catalase, superoxide dismutase), and succinate dehydrogenase activity were measured.

CuO Nanoparticles Reduce Toxicity and Enhance Bioaccumulation of Cadmium and Lead in the Cells of the Microalgae .

The removal of pollutants, including heavy metals, from the aquatic environment is an urgent problem worldwide. Actively developing nanotechnology areas is becoming increasingly important for solving problems in the field of the remediation of aquatic ecosystems. In particular, methods for removing pollutants using nanoparticles (NPs) are proposed, which raises the question of the effect of a combination of NPs and heavy metals on living organisms.

Reassessment of pore occlusion in some diatom taxa with re-evaluation of Mereschkowsky (Bacillariophyceae: Cymbellales) and description of two new genera.

In this article, the history and taxonomy of , the type species of the genus , was discussed. We investigated the structure of pore occlusions in and related genera. As a result, we propose a new classification for tectulum-like types of pore occlusions.

A new species of genus (Bacillariophyta) from Tibet, China.

During the investigation of the freshwater diatoms from Tibet, a monoraphid species was observed from a hot spring near Anduo County, located on a plateau in the central portion of Tibet. This species shares the diagnostic features of , such as the valve bent along the transapical axis, striae uniseriate to biseriate from centre to the apices and areolae with special structures located at the end of each stria. We compared the morphological characters of this new species with the others in this genus and show it to be new; it is named This species has small valves with slightly protracted ends with nearly capitate apices, lanceolate axial area, central area unilaterally expanded to the margin, striae uniseriate to biseriate, but, in some valves, the striae are only uniseriate.

gen. nov.-A New Diatom Genus with Unusual Morphology Split Off from the Genus Bory.

A new naviculoid diatom genus, gen. nov., was described based on a detailed morphological investigation using light and scanning electron microscopy.

Is the New ? (Cymbellales), a New Genus Based on Taxa Previously Assigned to .

A new diatom genus Kulikovskiy, Glushchenko, Genkal and Kociolek gen. nov., was described with species Glushchenko, Kulikovskiy and Kociolek sp.

Nitrogen and phosphorus stress as a tool to induce lipid production in microalgae.

Microalgae, capable of accumulating large amounts of lipids, are of great value for biodiesel production. The high cost of such production stimulates the search for cultivation conditions that ensure their highest productivity. Reducing the content of nitrogen and phosphorus in the culture medium is widely used to change the content and productivity of lipids in microalgae.

Taxonomy and Distribution of the Genus Mereschowsky (Bacillariophyceae: Sellaphoraceae) in Aquatic Ecosystems of Mongolia.

During our investigation, 28 species belonging to the genus Mereschowsky were found in different types of water bodies and streams in Mongolia. Of these, 14 species have already been described and/or shown earlier in the flora of Mongolia, and we found 14 species for the first time. One new taxonomic combination has been proposed: (J.

The Genus Ehrenberg (Bacillariophyta) from the Transbaikal Area (Russia, Siberia): Description of Seven New Species on the Basis of Morphology and Molecular Data with Discussion of the Phylogenetic Position of .

Seven species from the Transbaikal area, Russia, are described as new for science. These are , , , , , , and . All species are described by original LM and SEM microphotographs and molecular phylogeny.

Genetic Markers for Metabarcoding of Freshwater Microalgae: Review.

The metabarcoding methods for studying the diversity of freshwater microalgae and routine biomonitoring are actively used in modern research. A lot of experience has been accumulated already, and many methodological questions have been solved (such as the influence of the methods and time of sample conservation, DNA extraction and bioinformatical processing). The reproducibility of the method has been tested and confirmed.

New and Interesting Taxa from the Diatom Genus Ehrenberg in Shallow, Nearshore Sites on the Eastern Coast of Lake Baikal.

During this investigation, sixteen species from the genus were found in a shallow bay (near Oimur, Kabansky District) located on the eastern shore of Lake Baikal. Eleven of these taxa have been described previously. Five species are described as new to science.

Antioxidant Status and Biotechnological Potential of New (Eustigmatophyceae) Soil Strains in Enrichment Cultures.

The functional state of enrichment cultures of the Eustigmatophycean strains MZ-E3 and MZ-E4 after 25-day cultivation in the BBM medium was studied. The concentrations of chlorophyll , total carotenoids, protein, vitamins A and E, fatty acid peroxidation product content, an antioxidant enzyme, and succinate dehydrogenase activity were measured. MZ-E3 succinate dehydrogenase activity was significantly higher by 2.

The Influence of Solid and Liquid Systems In Vitro on the Growth and Biosynthetic Characteristics of Microshoot Culture of ssp. .

The paper focuses on the growth dynamics and biosynthetic characteristics of the microshoot culture of ssp. obtained in vitro in agar-solidified and liquid media. Microshoots cultured in either type of media showed similar growth dynamics.

LC-HRMS for the Identification of Quercetin and Its Derivatives in (Rosaceae) and Anatomical Features of Its Leaves.

L. is affiliated with the section Ser. of the genus L.

The Co-Evolution Aspects of the Biogeochemical Role of Phytoplankton in Aquatic Ecosystems: A Review.

In freshwater and marine ecosystems, the phytoplankton community is based on microalgae and cyanobacteria, which include phylogenetically very diverse groups of oxygenic photoautotrophs. In the process of evolution, they developed a wide range of bio(geo)chemical adaptations that allow them to effectively use solar radiation, CO, and nutrients, as well as major and trace elements, to form O and organic compounds with a high chemical bond energy. The inclusion of chemical elements in the key processes of energy and plastic metabolism in the cell is determined by redox conditions and the abundance and metabolic availability of elements in the paleoenvironment.

A New Cryptic Species of the Genus (Chlorophyceae, Sphaeropleales).

A new species of green coccoid algae, Mychonastes hindakii sp. nov., was isolated from the River Moscow (Russia, Moscow).

Production of Fluorescent Dissolved Organic Matter by Microalgae Strains from the Ob and Yenisei Gulfs (Siberia).

Dissolved organic matter (DOM) is an important component of aquatic environments; it plays a key role in the biogeochemical cycles of many chemical elements. Using excitation-emission matrix fluorescence spectroscopy, we examined the fluorescent fraction of DOM (FDOM) produced at the stationary phase of growth of five strains of microalgae sampled and isolated from the Ob and Yenisei gulfs. Based on the morphological and molecular descriptions, the strains were identified as diatoms (, cf.

sp. nov. (Chrysophyceae, Chromulinales), a New Species from the Arctic Including the Description of , fam. nov.

A new species, Chrysosphaerella septentrionalis, is described from a peat bog located on the bank of the Paz River (Pasvik Nature Reserve, Murmansk Region, Russia). Scale ultrastructure was studied using a scanning electron microscope. Morphologically, C.

Molecular and Morphological Investigations of Two Giant Diatom Species from the Transbaikal Area (Russia, Siberia) with Comments on Their Distributions.

For the first time, a giant diatom species of the genus from Lake Baikal was studied using molecular methods. Molecular and morphological investigations allowed to us to described one new species, Glushchenko, Kulikovskiy and Kociolek sp. nov.

gen. nov.-A New, Neglected Monoraphid Diatom Genus with a Cavum.

A new monoraphid diatom genus, gen. nov., is described on the basis of a detailed morphological investigation using light and scanning electron microscopy.

Phylogeny and fatty acid profiles of Aliinostoc vietnamicum sp. nov. (cyanobacteria) from the soils of Vietnam.

A new cyanobacterial species of Aliinostoc, A. vietnamicum sp. nov.

Description of the Soil Diatom sp. nov. (Bacillariophyceae, Sellaphoraceae) from Vietnam, with Remarks on the Phylogeny and Taxonomy of and Systematic Position of .

In material isolated from soils of Cát Tiên National Park, we isolated four strains that were assigned to the genus . Identification was carried out on the basis of morphological and molecular studies. We proposed a new species named sp.

Phylogeny and Fatty Acid Profiles of New (Bacillariophyta) Species from Soils of Vietnam.

We studied the morphology, ultrastructure, and phylogeny of eight soil diatom strains assigned to the genus. Six of these strains, identified by us as new species, are described for the first time. We provide a comprehensive comparison with related species and include ecological data.