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Ulothrix
''Ulothrix'' is a genus of green algae in the family Ulotrichaceae. It is a common in fresh to marine habitats, particularly colder and temperate waters. It has a cosmopolitan distribution. The genus includes: * '' Ulothrix aequalis'' Guiry, M.D., John, D.M., Rindi, F and McCarthy, T.K. (ed.) 2007. ''New Survey of Clare Island Volume: The Freshwater and Terrestrial Algae''. Royal Irish Academy. . * ''Ulothrix moniliformis'' * '' Ulothrix flacca'' Burrows, E.M. 1991. ''Seaweeds of the British Isles Volume 2: Chlorophyta''. Natural History Museum, London . * '' Ulothrix implexa'' * '' Ulothrix speciosa'' * '' Ulothrix tenerrima'' * '' Ulothrix tenuissima'' * '' Ulothrix zonata'' Description ''Ulothrix'' consists of cells arranged end-to-end to form unbranched, uniseriate filaments. The filament is attached to a substrate via a basal cell, which may be rhizoidal. Cells are cylindrical or barrel-shaped; the apical cell may somewhat rounded at its terminal end. The cell w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulothrix 425
''Ulothrix'' is a genus of green algae in the family Ulotrichaceae. It is a common in Fresh water, fresh to Sea water, marine habitats, particularly colder and temperate waters. It has a cosmopolitan distribution. The genus includes: * ''Ulothrix aequalis'' Guiry, M.D., John, D.M., Rindi, F and McCarthy, T.K. (ed.) 2007. ''New Survey of Clare Island Volume: The Freshwater and Terrestrial Algae''. Royal Irish Academy. . * ''Ulothrix moniliformis'' * ''Ulothrix flacca'' Burrows, E.M. 1991. ''Seaweeds of the British Isles Volume 2: Chlorophyta''. Natural History Museum, London . * ''Ulothrix implexa'' * ''Ulothrix speciosa'' * ''Ulothrix tenerrima'' * ''Ulothrix tenuissima'' * ''Ulothrix zonata'' Description ''Ulothrix'' consists of cells arranged end-to-end to form unbranched, uniseriate filaments. The filament is attached to a substrate via a basal cell, which may be rhizoidal. Cells are cylindrical or barrel-shaped; the apical cell may somewhat rounded at its terminal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulothrix Tenuissima
''Ulothrix'' is a genus of green algae in the family Ulotrichaceae. It is a common in fresh to marine habitats, particularly colder and temperate waters. It has a cosmopolitan distribution. The genus includes: * '' Ulothrix aequalis'' Guiry, M.D., John, D.M., Rindi, F and McCarthy, T.K. (ed.) 2007. ''New Survey of Clare Island Volume: The Freshwater and Terrestrial Algae''. Royal Irish Academy. . * ''Ulothrix moniliformis'' * '' Ulothrix flacca'' Burrows, E.M. 1991. ''Seaweeds of the British Isles Volume 2: Chlorophyta''. Natural History Museum, London . * '' Ulothrix implexa'' * '' Ulothrix speciosa'' * ''Ulothrix tenerrima'' * '' Ulothrix tenuissima'' * '' Ulothrix zonata'' Description ''Ulothrix'' consists of cells arranged end-to-end to form unbranched, uniseriate filaments. The filament is attached to a substrate via a basal cell, which may be rhizoidal. Cells are cylindrical or barrel-shaped; the apical cell may somewhat rounded at its terminal end. The cell wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulothrix Flacca
''Ulothrix flacca'' is a species of green algae in the family Ulotrichaceae. It is a marine or brackish species, typically found in the intertidal zone. Description ''Ulothrix flacca'' grows as small tufts of green unbranched filaments growing to no more than 10 cm long, forming woolly masses attached to rocks. It consists of soft, long filaments which are uniseriate (very rarely a cell may undergo longitudinal division and become biseriate). Basal cells are elongated, or in mature filaments, differentiated into a complex rhizoidal branching system. Cells are cylindrical, 14.4–32.6 μm broad and 4.8–9.6 μm,Newton, L. 1931. ''A Handbook of the British Seaweeds.'' British MuseumBurrows, E.M.1991. ''Seaweeds of the British Isles Volume 2 Chlorophyta''. Natural History Museum, London Cells contain a single chloroplast, which is parietal and sometimes lobed. The chloroplast shape varies with age: in young cells, the chloroplasts tend to be shorter and covering less of the ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulothrix Speciosa
''Ulothrix speciosa'' is a species of green algae in the family Ulotrichaceae. It is a marine or brackish species, typically found in the littoral zone. Description ''Ulothrix flacca'' consists of greenish filaments attached to a substrate, which grow up to 12 cm long.Burrows, E.M. 1991. ''Seaweeds of the British Isles Volume 2 Chlorophyta.'' Natural History Museum London Filaments are robust, soft, straight when young, becoming curled at maturity. It grows in flowing or spreading tufts. The filaments are unbranched but may end up becoming tangled. Cells are attached to a substrate via a differentiated basal cell, or intercalary cells which develop rhizoids. Cells are cylindrical, with swollen ends when older; the filaments may be occasionally in multiseriate rows. Cells are typically 14.8–63.6 μm wide, and 4.8-15.6 μm tall. Near the basal part of the filament, cells are often narrower and shorter. Cells contain a single chloroplast, which is parietal and sometimes lobe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulothrix Aequalis
''Ulothrix aequalis'' is a species of green algae. It is a freshwater species, typically found in running waters. It has been reported from Europe, the Americas, Asia, and New Zealand. Description ''Ulothrix aequalis'' consists of uniseriate filaments of cells. The cells are cylindrical, 12–22 microns broad and 26–30 microns long. They are attached a cell or rhizoids at the base.Guiry, M.D., John, D.M. Rindi, F. and McCathy, T.K. (Ed) 2007. ''New Survey of Clare Island Volume 6: The Freshwater and Terrestrial Algae'' Royal Irish Academy. The cell wall is more or less thickened and often striated. Cells each contain a broad, girdle-shaped chloroplast which covers at least half of the cell circumference; the chloroplast has one or two pyrenoids. Asexual reproduction is by zoospores or aplanospores. Akinetes are also produced, and they lack distinct ornamentation. Sexual reproduction Sexual reproduction is a type of reproduction that involves a complex life cycle in which a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulotrichaceae
Ulotrichaceae is a family of green algae in the order Ulotrichales. Members of the family are found in both marine and freshwater habitats. Members of the family Ulotrichaceae consist of unbranched filaments. The cells are typically barrel-shaped or cylindrical, wider than long. The cell has a chloroplast which forms a girdle-shaped parietal band; each chloroplast may have several pyrenoids. Asexual reproduction occurs via fragmentation of the filament, or the production of zoospores. Sexual reproduction is isogamous, and involves an alternation of generations Alternation of generations (also known as metagenesis or heterogenesis) is the predominant type of life cycle in plants and algae. In plants both phases are multicellular: the haploid sexual phase – the gametophyte – alternates with a diploi ... between the larger, filamentous gametophyte and a ''Codiolum''-stage sporophyte. References Ulvophyceae families Taxa named by Friedrich Traugott Kützing { ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zoospore
A zoospore is a motile asexual spore that uses a flagellum for locomotion in aqueous or moist environments. Also called a swarm spore, these spores are created by some protists, bacteria, and fungi to propagate themselves. Certain zoospores are infectious and transmittable, such as '' Batrachochytrium dendrobatidis'', a fungal zoospore that causes high rates of mortality in amphibians. Diversity General morphology Zoospores are composed of a microtubular cytoskeleton base which extends from the base of the flagellum. The complexity and structure of this cytoskeleton is variable and is largely dependent on volume and size. One common feature of zoospores is their asymmetrical shape; a result of the ventral grove housing the flagella base. Certain zoospores progress through different phases, the first phase commonly referred to as 'the initial'. Others form cysts that vary tremendously in volume (14-4905 cubic micrometers) and shape, each with distinctive hair structures. Flag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
