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.
131
datasets available to search
ShareScore release 0.9.0
Dataset results
131 results for “green algae”
FIGURE 4 in Two new green algae, Rhizoclonium fractum sp. nov. and R. umbraticum sp. nov., from tropical and subtropical brackish waters of Japan
FIGURE 4. Maximum likelihood (ML) tree for Cladophorales developed using large subunit ribosomal RNA gene (LSU) rDNA sequences. ML bootstrap values (>50) and Bayesian inference posterior probabilities (>0.90) are indicated at branches. Scale bar = 0.02 substitutions per nucleotide site. Asterisks indicate the type species of each genus.
FIGURE 6 in Two new green algae, Rhizoclonium fractum sp. nov. and R. umbraticum sp. nov., from tropical and subtropical brackish waters of Japan
FIGURE 6. Cultured material of Cladophoraceae sp. 1 (Rhizoclonium fractum). (A–D) Morphologies of growing filamentous thalli. (A, B) Some of the thalli have rhizoidal structures. (E, F) Chloroplasts with many starch granules. (G) Autofluorescence of chloroplasts. (H) Cells stained with DAPI, showing nuclei. (I) Cells stained with Lugol's iodine, showing the pyrenoids. Scale bar = 20 μm (A–C, E–G); Scale bars = 40 μm (D); Scale bars = 10 μm (H, I).
FIGURE 3 in Two new green algae, Rhizoclonium fractum sp. nov. and R. umbraticum sp. nov., from tropical and subtropical brackish waters of Japan
FIGURE 3. Maximum likelihood (ML) tree for Cladophorales developed using the small subunit ribosomal RNA gene (SSU) rDNA sequences. ML bootstrap values (>50) and Bayesian inference posterior probabilities (>0.90) are indicated at the tree branches. Scale bar = 0.01 substitutions per nucleotide site. Asterisks indicate the type species of each genus.
FIGURE 1 in Two new green algae, Rhizoclonium fractum sp. nov. and R. umbraticum sp. nov., from tropical and subtropical brackish waters of Japan
FIGURE 1. Fields material of Cladophoraceae spp. (A, B) Cladophoraceae sp. 1 and 2 growing on mangroves. Arrow heads point to (C) Cladophoraceae sp. 3 growing at shady covered conduits.
FIGURE 2 in Two new green algae, Rhizoclonium fractum sp. nov. and R. umbraticum sp. nov., from tropical and subtropical brackish waters of Japan
FIGURE 2. Map showing the collecting site of Cladophoraceae spp. (1) Tanotsu, Fukuoka, Fukuoka Pref., (2) Kunimikoujiro, Unzen, Nagasaki Pref., (3) Ki-ire, Kagoshima, Kagoshima Pref., (4) Atake River, Tanegashima Is. Kagoshima Pref., (5) Kesaji, Higashi, Okinawa Pref., (6) Oura, Nago, Okinawa Pref., (7) Lake Man, Naha, Okinawa Pref., (8) Miyara, Ishigaki, Okinawa Pref. ○: Cladophoraceae sp. 1 (= Rhizoclonium fractum), O: Cladophoraceae sp. 2 (= R. minutissimum), Δ: Cladophoraceae sp. 3 (= R. umbraticum).
FIGURE 9 in Two new green algae, Rhizoclonium fractum sp. nov. and R. umbraticum sp. nov., from tropical and subtropical brackish waters of Japan
FIGURE 9. Field-collected specimens of Cladophoraceae sp. 3 (Rhizoclonium umbraticum). (A) Morphologies of field-collected specimens. (B, C) Filamentous thalli with non-septate rhizoids. (D–F) Spindle- and band-shaped chloroplasts with pyrenoids (arrow heads). (G, H) Autofluorescence of chloroplasts. (I) Cells stained with DAPI, showing nuclei. (J) Cells stained with Lugol's iodine, showing pyrenoids. (K, L) Pyrenoids observed by transmission electron microscopy. Pyrenoids with starch plates. (K) A thylakoid membrane; (L) Three thylakoid membranes traversing a pyrenoid. Scale bars = 80 μm (A–C); Scale bars = 10 μm (D–H); Scale bars = 40 μm (H, J); Scale bars = 0.5 μm (K, L).
FIGURE 6 in Fritschiella aquatilis (Chaetophoraceae, Chlorophyta), a new freshwater green algae species from China
FIGURE 6. Secondary structure prediction of internal transcribed spacer (ITS2) for (a) Fritschiella tuberosa HF920665 and (b) Fritschiella aquatilis MH842281. Compared between the two ITS2 structures, the differences are highlighted in gray. Positions that differ significantly from others are marked with boxes.
FIGURE 5 in Fritschiella aquatilis (Chaetophoraceae, Chlorophyta), a new freshwater green algae species from China
FIGURE 5. NJ phylogenetic tree derived from rbcL gene sequences. Support values>50% for all analyses are shown on branches as follows: Neighbor-joining distance bootstrap (NJ)/ maximum likelihood bootstrap values (ML) / Bayesian posterior probabilities (BA). '-' denotes <50% support for that analyses at that node. All Frischiella sequences are highlighted, and the new sequence generated in this study is in gray.
FIGURE 4 in Fritschiella aquatilis (Chaetophoraceae, Chlorophyta), a new freshwater green algae species from China
FIGURE 4. NJ phylogenetic tree derived from 18S rDNA gene sequences. Support values>50% for all analyses are shown on branches as follows: Neighbor-joining distance bootstrap (NJ)/ maximum likelihood bootstrap values (ML) / Bayesian posterior probabilities (BA). '-' denotes <50% support for that analyses at that node. All Frischiella sequences are highlighted, and the new sequence generated in this study is in gray.
FIGURE 2 in Fritschiella aquatilis (Chaetophoraceae, Chlorophyta), a new freshwater green algae species from China
FIGURE 2. Habitat and morphological structures of Fritschiella aquatilis. Scale bar 1 cm (b), 100 μm (c), 20 μm (d, e, f).
FIGURE 3 in Fritschiella aquatilis (Chaetophoraceae, Chlorophyta), a new freshwater green algae species from China
FIGURE 3. NJ phylogenetic tree derived from 28S rDNA gene sequences. Support values>50% for all analyses are shown on branches as follows: Neighbor-joining distance bootstrap (NJ)/ maximum likelihood bootstrap values (ML) / Bayesian posterior probabilities (BA). '-' denotes <50% support for that analyses at that node. All Frischiella sequences are highlighted, and the new sequence generated in this study is in gray.
FIGURE 4 in Spongiosarcinopsis terrestris gen. et sp. nov. (Chlorophyta, Chlorophyceae): a new genus of green algae from gray forest soil, Russia
FIGURE 4. Comparison of the ITS2 secondary structures of Spongiosarcinopsis terrestris ACSSI 023 (core structure) and Spongiochloris spongiosa SAG 2469. The CBCs are noted in boxes, CBCs of the conserved regions are marked with arrows, characteristic motifs at the apex of helix III ITS2 are underlined.
FIGURE 3 in Spongiosarcinopsis terrestris gen. et sp. nov. (Chlorophyta, Chlorophyceae): a new genus of green algae from gray forest soil, Russia
FIGURE 3. Phylogenetic analysis based on 18S rRNA gene sequences data demonstrating position of Spongiosarcinopsis gen. nov. within the family Protosiphonaceae. The tree is based on Bayesian topology. The support values are given for Bayesian posterior probabilities, and maximum likelihood (BI/ML). The cut-off values for probability and bootstrap are 0.5 and 50%, respectively. Hyphen (-) indicates unsupported node. Our reference strain ACSSI 023 (MF687231) is printed in bold. Black circles indicate which sequences originate from terrestrial (aerophytic/soil), white circles indicate which ones are from aquatic habitats (freshwater), gray circles indicate missing information.
FIGURE 2 in Spongiosarcinopsis terrestris gen. et sp. nov. (Chlorophyta, Chlorophyceae): a new genus of green algae from gray forest soil, Russia
FIGURE 2. TEM images of Spongiosarcinopsis terrestris, strain ACSSI 023. A. Single young ellipsoidal cell just derived from a zoospore or aplanospore. B. Single young sphaerical vegetative cell. Each young cell possess a chloroplast with one pyrenoid covered by a starch envelope. C. Single mature vegetative cell with a chloroplast containing three pyrenoids, each covered with numerous starch plates. D. Thick cell-walled mature cells combined into a diad resulting from desmoschisis. In addition to starch plates around pyrenoids, smaller starch grains are distributed in the chloroplast stroma. E, F Aplanosporangia containing aplanospores covered by thin cell walls. G. Released aplanospores. A = aplanospore; C = chloroplast, N = nucleus, P = pyrenoid, S = starch grains in the chloroplast stroma; SE = starch envelope of the pyrenoid, V = vacuole, W = cell wall. Arrows indicate thylakoids penetrating into the pyrenoid matrix. Scale bar is 1 μm for A–C and 2 μm for D–G.
FIGURE 1 in Spongiosarcinopsis terrestris gen. et sp. nov. (Chlorophyta, Chlorophyceae): a new genus of green algae from gray forest soil, Russia
FIGURE 1. LM micrographs of Spongiosarcinopsis terrestris, strain ACSSI 023. A. Young vegetative cells derived from zoospores. B. Spherical cell in actively growing culture. C. Aplanospores and aplanosporangium. D, E. Mature vegetative cells arranged in diad and tetrad aggregation in 3-month-old cultures. F. Akinetes and the accumulation of secondary carotenoids, which were detected by changes in the color of the algal mass to orange in old cultures (7 months). Scale = 10 μm.
FIGURES 12–13 in Zygospore morphology in the conjugating green alga Spirotaenia diplohelica (Streptophyta, Zygnematophyceae, Mesotaeniaceae)
FIGURES 12–13. Spirotaenia diplohelica. Drawings of zygospores (after photographs). 12. Zygospore in optical section with adhering remnants of parental cells. 13. Zygospore in multifocus. Scale bar: 10 μm.
FIGURES 6–11. Spirotaenia diplohelica. 6–8 in Zygospore morphology in the conjugating green alga Spirotaenia diplohelica (Streptophyta, Zygnematophyceae, Mesotaeniaceae)
FIGURES 6–11. Spirotaenia diplohelica. 6–8. Focus-through series of one and the same zygospore. 9–11. Zygospores in stages of progressing maturity expressed by a gradual darkening and thickening of the spore wall. Scale bar: 10 μm.
FIGURES 1–5. Spirotaenia diplohelica. 1–3 in Zygospore morphology in the conjugating green alga Spirotaenia diplohelica (Streptophyta, Zygnematophyceae, Mesotaeniaceae)
FIGURES 1–5. Spirotaenia diplohelica. 1–3. vegetative cells, characterized by a double, spiralized chloroplast tape. 4. zygospore with adhering remnants of gametangial cells. 5. zygospore showing overlaying hyaline membrane. Scale bar: 10μm.
Data from: Repeated evolution and reversibility of self-fertilization in the volvocine green algae
Outcrossing and self-fertilization are fundamental strategies of sexual reproduction, each with different evolutionary costs and benefits. Self-fertilization is thought to be an evolutionary "dead-end" strategy, beneficial in the short term but costly in the long term, resulting in self-fertilizing species that occupy only the tips of phylogenetic trees. Here, we use volvocine green algae to investigate the evolution of self-fertilization. We use ancestral-state reconstructions to show that self-fertilization has repeatedly evolved from outcrossing ancestors and that multiple reversals from selfing to outcrossing have occurred. We use three phylogenetic metrics to show that self-fertilization is not restricted to the tips of the phylogenetic tree, a finding inconsistent with the view of self-fertilization as a dead-end strategy. We also find no evidence for higher extinction rates or lower speciation rates in selfing lineages. We find that self-fertilizing species have significantly larger colonies than outcrossing species, suggesting the benefits of selfing may counteract the costs of increased size. We speculate that our macroevolutionary results on self-fertilization (i.e. non-tippy distribution, no decreased diversification rates) may be explained by the haploid-dominant life cycle that occurs in volvocine algae, which may alter the costs and benefits of selfing.
FIGS 19–24 in The marine green and brown algae of Rodrigues (Mauritius, Indian Ocean)
FIGS 19–24. Chlorophyta. (19) Caulerpa nummularia, proliferating from primary, peltate assimilator (HEC 14609 p.p.). (20) Rhipidosiphon javensis (HEC 14763). (21) Udotea sp. (HEC 14759). (22–24) Udotea palmetta (HEC 14817): (22) general morphology of large, fertile specimen; (23) gametangia growing from the blade surface; (24) gametangia growing from the blade margin. Scale bars: 2 mm (19, 20); 1 cm (21, 22); 1 mm (23); 500 mm (24).
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.