Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
29
datasets available to search
ShareScore release 0.9.0
Dataset results
29 results for “Desmidiales”
Data from: Static allometry of unicellular green algae: scaling of cellular surface area and volume in the genus Micrasterias (Desmidiales)
The surface area-to-volume ratio of cells is one of the key factors affecting fundamental biological processes and, thus, fitness of unicellular organisms. One of the general models for allometric increase in surface-to-volume scaling involves fractal-like elaboration of cellular surfaces. However, specific data illustrating this pattern in natural populations of the unicellular organisms have not previously been available. This study shows that unicellular green algae of the genus Micrasterias (Desmidiales) have positive allometric surface-to-volume scaling caused by changes in morphology of individual species, especially in the degree of cell lobulation. This allometric pattern was also detected within most of the cultured and natural populations analysed. Values of the allometric S:V scaling within individual populations were closely correlated to the phylogenetic structure of the clade. In addition, they were related to species-specific cellular morphology. Individual populations differed in their allometric patterns, and their position in the allometric space was strongly correlated with the degree of allometric S:V scaling. This result illustrates that allometric shape patterns are an important correlate of the capacity of individual populations to compensate for increases in their cell volumes by increasing the surface area. However, variation in allometric patterns was not associated with phylogenetic structure. This indicates that the position of the populations in the allometric space was not evolutionarily conserved and might be influenced by environmental factors.
FIGURE 5 in Penium amplificatum status nova (Desmidiales, Streptophyta)
FIGURE 5. Angle of cell wall striae in degrees. The boxes show the 25th percentile (bottom), 50th percentile (middle) and the 75th percentile (top).
FIGURE 3 in Penium amplificatum status nova (Desmidiales, Streptophyta)
FIGURE 3. Shape of cell apex and cell wall striation in Penium spirostriolatum var. spirostriolatum (A, B) and P. spirostriolatum var. amplificatum (C, D). Scale bar = 20 µm.
FIGURE 4 in Penium amplificatum status nova (Desmidiales, Streptophyta)
FIGURE 4. Number of cell wall striae per 10 µm. The boxes show the 25th percentile (bottom), 50th percentile (middle) and the 75th percentile (top).
FIGURE 1 in Penium amplificatum status nova (Desmidiales, Streptophyta)
FIGURE 1. Distribution of two varieties of Penium spirostriolatum in the Dutch province of Drenthe. The grid shows the Dutch 5x5 km RD grid.
FIGURE 2 in New geographical and taxonomical observations on two rare Gonatozygon species (Zygnematophyceae, Desmidiales) from the upper Okavango Delta, Botswana
FIGURE 2. Light microscope images of Gonatozygon dicranoaculeatum Thomasson from the Okavango Delta (Botswana). A–D) Vegetative cells, E) Central part of a vegetative cell showing the absence of a median constriction, F) Asymmetrical, longer cell with chloroplast in one semicell longer compared to that in the other semicell, G) Portion of cell indicating the structure of bifurcated spines on the surface. Scale bar 20 µm.
FIGURE 3 in New geographical and taxonomical observations on two rare Gonatozygon species (Zygnematophyceae, Desmidiales) from the upper Okavango Delta, Botswana
FIGURE 3. Scanning electron micrographs of cells of Gonatozygon dicranoaculeatum Thomasson, illustrating the A) apex, B) cell wall, and C) spine structure. Scale bars 10 µm.
FIGURE 1. A in New geographical and taxonomical observations on two rare Gonatozygon species (Zygnematophyceae, Desmidiales) from the upper Okavango Delta, Botswana
FIGURE 1. A) Map of southern Africa indicating the position of the sampling site in the Nxamaseri floodplain, Okavango Delta, Botswana, B) Photograph of the sampling site.
FIGURE 4 in New insights into the morphology, taxonomy and geographical distribution of Pleurotaenium subcoronulatum (Zygnematophyceae, Desmidiales)
FIGURE 4. Comparison of the morphology of P. subcoronulatum with closely related infraspecific taxa. A) P. subcoronulatum (from Turner 1893), B) P. subcoronulatum (from West & West 1895, C) P. subcoronulatum f. elongatum (from Prescott et al. 1975), D) P. subcoronulatum var. africanum (from Krieger 1937), E) P. subcoronulatum var. detum (from West & West 1896), F) P. subcoronulatum var. maximum (from Van Oye 1953), G) P. subcoronulatum var. rectum (from Borge 1903) and H) P. subcoronulatum var. spinulosum (from Opute 2000). No scale bars; dimensions indicated in descriptions.
FIGURE 3 in New insights into the morphology, taxonomy and geographical distribution of Pleurotaenium subcoronulatum (Zygnematophyceae, Desmidiales)
FIGURE 3. Global distribution of all infraspecific taxa of Pleurotaenium subcoronulatum. A) Comprehensive depiction sourced from previous publications, B) Close-up view of the southern African region, highlighting the distribution of P. subcoronulatum along with its infraspecific taxa.
FIGURE 1. A in New insights into the morphology, taxonomy and geographical distribution of Pleurotaenium subcoronulatum (Zygnematophyceae, Desmidiales)
FIGURE 1. A) Map of southern Africa indicating the position of the sampling site in the Nxamaseri floodplain, Okavango Delta, Botswana, B) Photograph of the sampling site.
FIGURE 2 in New insights into the morphology, taxonomy and geographical distribution of Pleurotaenium subcoronulatum (Zygnematophyceae, Desmidiales)
FIGURE 2. Scanning electron micrographs of Pleurotaenium subcoronulatum f. majus Rich (A–D) and P. subcoronulatum (E–F). A) Entire cell of P. subcoronulatum f. majus with two unequal semicells, B) Central part of the cell illustrating the isthmal ring (arrow), C) Apical end of upper semicell with apical tubercles and bordered pits (arrow), and D) Apical end of lower semicell illustrating tubercles with fluted cell wall, E) Small semicell of P. subcoronulatum with inflated basal area (arrow), and F) higher magnificaton of apical end with teeth-like tubercles. Scale bars: 50 µm (A–E) and 25 µm (F).
FIGURES 8–11. 8. Cosmarium rostafinskii. 9. C. benedictum. 10. C. amstelodamense. 11. C in Some new and interesting desmids (Streptophyta, Desmidiales) from ephemeral puddles in the urban and industrial areas of Amsterdam (Netherlands)
FIGURES 8–11. 8. Cosmarium rostafinskii. 9. C. benedictum. 10. C. amstelodamense. 11. C. benedictum, zygote. Scalebar = 10μm.
FIGURES 12–18. 12–14. Cosmarium notabile. 15–16. C. galeatum. 17. C. fruticosum. 18. C in Some new and interesting desmids (Streptophyta, Desmidiales) from ephemeral puddles in the urban and industrial areas of Amsterdam (Netherlands)
FIGURES 12–18. 12–14. Cosmarium notabile. 15–16. C. galeatum. 17. C. fruticosum. 18. C. scutiforme. Scalebar = 10μm.
FIGURES 25, 26 in Taxonomic notes on Dutch desmids V (Streptophyta, Desmidiales): new species, new morphological features
FIGURES 25, 26: LM images of (almost) empty cells of Sphaerozosma aubertianum showing crossing rows of cell wall pores. Scale bar = 10 µm.
FIGURES 1–4 in Taxonomic notes on Dutch desmids V (Streptophyta, Desmidiales): new species, new morphological features
FIGURES 1–4: Closterium pronum. Fig. 1: vegetative cell. Fig. 2–4: three successive stages of zygospore formation (Fig. 4: mature zygospore in frontal and apical view). FIGURES 5–8: Closterium pygmaeum. FIGURES 9, 10: Euastrum pseudotuddalense. FIGURES 11, 12: Cosmarium vossenbergense. Scale bar A (50 µm): Figs 1–4. Scale bar B (10 µm): Figs 5–12.
FIGURES 19, 20 in Taxonomic notes on Dutch desmids V (Streptophyta, Desmidiales): new species, new morphological features
FIGURES 19, 20: LM images of Euastrum pseudotuddalense in frontal and apical view, respectively. FIGURE 21: LM picture of Sphaerozosma vertebratum, courtesy H. Schulp. FIGURES 22–24: LM pictures of Sphaerozosma
FIGURES 13–16 in Taxonomic notes on Dutch desmids V (Streptophyta, Desmidiales): new species, new morphological features
FIGURES 13–16: LM images of Closterium pronum, representing four successive stages of zygospore formation. FIGURE 17: LM image of Closterium pygmaeum. FIGURE 18: LM image of Cosmarium vossenbergense. In all figures, scale bar = 10 µm.
FIGURE 30 in Taxonomic notes on Dutch desmids VI (Streptophyta, Desmidiales): new species, newly described zygospores
FIGURE 30. Cell length of St. brachiatum and St. brachiatoides. The boxes show the 25th percentile (bottom), 50th percentile (middle) and the 75th percentile (top). The cross shows the mean cell length.
FIGURES 8–12. 8 in Taxonomic notes on Dutch desmids VI (Streptophyta, Desmidiales): new species, newly described zygospores
FIGURES 8–12. 8. Staurastrum quadriradiatum, cell in frontal and apical view. 9. Staurastrum quadriradiatum cell in so-called position 1. 10. Staurastrum quadriradiatum cell in position 2, only two of the four processes are shown. 11. Actinotaenium spinosporum, vegetative cell in frontal and apical view. 12. Actinotaenium spinosporum, zygospore.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.