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Chlorellaceae
Chlorellaceae are a family of green algae in the order Chlorellales. About 250 species are currently accepted in the family. Members of the family are distributed worldwide and are common in a variety of freshwater, terrestrial and marine environments. Members of the family Chlorellaceae are important ecologically, mainly as primary producers. Algae such as ''Chlorella'' are important model organisms for plant physiology and biochemistry, because of they are easy to cultivate and grow rapidly. Additionally, many members are rich in lipids, carbohydrates and vitamins, making them of interest in the field of biotechnology. Meanwhile, genera such as '' Prototheca'' are of clinical significance as pathogens of humans and other animals. Description Members of Chlorellaceae are morphologically diverse and include solitary and colonial forms. Traditionally, the family was circumscribed based on the mode of reproduction (production of autospores), and the family was defined around the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Didymogenes
''Didymogenes'' is a genus of microscopic green algae in the class Trebouxiophyceae. It is a planktonic species found in freshwater habitats worldwide. Formerly placed in the family Scenedesmaceae, molecular studies have placed it in the family Chlorellaceae. Description ''Didymogenes'' consists of colonies of two or four cells, termed coenobia, which may sometimes be united to form compound coenobia (syncoenobia). Cells are attached to each other by their centers, arranged parallel or crosswise. The cells are curved or sigmoid, 4–18 μm long, with apices rounded. The cell walls are smooth or with granules, or with bristles. Inside the cells are a single nucleus and a single parietal chloroplast with a pyrenoid. The ultrastructure of the bristles are similar to that of the closely related '' Micractinium''. In 2013, two additional species of ''Didymogenes'', '' D. soliella'' and '' D. sphaerica'', were described. The morphologies of these two species are dissimilar from ''Didy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prototheca
''Prototheca'' is a genus of algae in the family Chlorellaceae. While this genus is a member of the green algae, all ''Prototheca'' no longer have chloroplasts and therefore their photosynthetic ability. Some species can cause protothecosis in humans and various vertebrates. Etymology From the Greek ''proto''- (first) + ''thēkē'' (sheath), ''Prototheca'' is a genus of variably shaped spherical cells of achloric algae in the family Chlorellaceae. Wilhelm Krüger, a German expert in plant physiology and sugar production, reported ''Prototheca'' microorganisms in 1894, shortly after spending 7 years in Java studying sugarcane. He isolated ''Prototheca'' species from the sap of 3 tree species. Krüger named these organisms as ''P. moriformis'' and ''P. zopfii'', the second name as a tribute to Friedrich Wilhelm Zopf, a renowned botanist, mycologist, and lichenologist. Biology ''Prototheca'' consists of microscopic, single cells, which may sometimes be clustered to form irre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Micractinium
''Micractinium'' is a genus of microscopic green algae in the family Chlorellaceae. Species of the genus ''Micractinium'' are found as phytoplankton, and are commonly found in freshwater habitats around the world. A few species are found as endosymbionts of ciliates. There is increasing interest in ''Micractinium'' due to its high growth rate and lipid production. Description Cells of ''Micractinium'' are spherical to ellipsoidal, and are solitary or stuck together in colonies. Colonies can contain up to 128, occasionally 256 cells, and are polyhedral or pyramidal in shape. Most species generally produce long narrow bristles that taper from base to tip. Cells have a single cup-shaped chloroplast with a single pyrenoid. Bristles consist of protein and lack cellulosic fibers; they are produced after the cell wall. ''Micractinium'' reproduces asexually via the formation of autospores (usually four per cell), which are released from by a rupture in the parental cell wall. Autospore ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Auxenochlorella
This is a list of genera in the green algae class Trebouxiophyceae, sub-divided by order and family. Some genera have uncertain taxonomic placement and are listed as ''incertae sedis''. Ranks without accepted subordinate taxa have been omitted. The list is based on the data available in AlgaeBase, the Integrated Taxonomic Information System (ITIS), the National Center for Biotechnology Information taxonomic database (NCBI), and other taxonomic databases. Order Chlorellales Family Chlorellaceae * '' Acanthosphaera'' * '' Actinastrum'' * '' Apatococcus'' * '' Apodococcus'' * '' Auxenochlorella'' * '' Carolibrandtia'' * '' Catena'' * ''Chlorella'' * '' Chloroparva'' * '' Closteriopsis'' * '' Compactochlorella'' * '' Coronacoccus'' * '' Coronastrum'' * '' Cylindrocelis'' * '' Dicellula'' * '' Dictyosphaerium'' * ''Didymogenes'' * '' Fissuricella'' * '' Follicularia'' * '' Geminella'' * ''Gloeotila'' * '' Golenkiniopsis'' * '' Hegewaldia'' * ''Helicosporidium'' * '' Heynigia'' * '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Actinastrum
''Actinastrum'' is a genus of freshwater green algae. It was first described by Gustaf Lagerheim in 1882. Members of the genus are commonly found in eutrophic freshwater ponds and lakes, and have a cosmopolitan distribution. Traditionally, ''Actinastrum'' was placed within the family Coelastraceae based on morphology (spherical, three-dimensional colonies and reproduction by autospores). However, molecular phylogenetic studies have shown that the type species ''Actinastrum hantzschii'' is closely related to ''Chlorella'', another autospore-forming genus in the family Chlorellaceae. Description ''Actinastrum'' consists of eight (sometimes two, four or 16) cells, which are attached together at a common point to form a star-shaped colony, termed a coenobium. The colonies are often aggregated to form compound coenobia. Cells are 7–40 μm long and 1–8 μm wide, much longer than broad, and are cylindrical, cigar-shaped, or pointed. The cell wall is smooth, thin, and not thickene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chlorellales
The Chlorellales are an order of green algae in the class Trebouxiophyceae. The Chlorellales include mostly freshwater or terrestrial (rarely marine), coccoid algae. Molecular phylogenetic studies mostly tend to find Chlorellales to consist of two sister clades, corresponding to Chlorellaceae and Oocystaceae; however, in some studies the two are not sister to each other, making Chlorellales not monophyletic. Genera of uncertain placement include: *'' Ankistrodesmopsis'' *'' Edaphochloris'' *''Picochlorum ''Picochlorum'' is a genus of green algae in the class Trebouxiophyceae. , AlgaeBase regarded the name as illegitimate Legitimacy, in traditional Western common law, is the status of a child born to parents who are legally married to each ot ...'' *'' Uvulifera'' References Chlorophyta orders {{green algae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthosphaera
''Acanthosphaera'' is a genus of green algae, in the family Chlorellaceae. It contains the sole species ''Acanthosphaera zachariasii'', although some sources list a second species, ''Acanthosphaera tenuissima''. It is widely distributed, in freshwater habitats and exists as phytoplankton. ''Acanthosphaera'' consists of solitary, free-living planktonic cells. The cell is spherical, about 8–15 μm in diameter and uniformly covered in 20–40 spines. The spines are distinctly thickened at the base, and very narrow at the tips. The spines are organized in four whorls of 4, 8, 8, and 4 respectively. Cells contain a single nucleus and one parietal, cup-shaped chloroplast, which has a single, prominent pyrenoid with a starch sheath. Asexual reproduction occurs by the formation of two, four or eight zoospores, released via the rupture of the parental cell wall. Zoospores as having two flagella, are ovoid and often have two stigmata and four contractile vacuole A contractile vacuole ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helicosporidium
''Helicosporidium'' is a genus of colorless, pathogenic algae in the class Trebouxiophyceae of the green algae. It is a parasite found in the gut of insects, and a close relative of '' Prototheca''. History of knowledge The genus ''Helicosporidium'' was first described in England by David Keilin in 1921. He isolated the parasite from the ceratopogonid fly '' Dasyhelea obscura'', and named the species ''Helicosporidium parasiticum''. In 1931, the genus and species names were validated, it was placed in its own order Helicosporidia. In 1970, ''Helicosporidium'' was discovered from Argentina infecting a lepidopteran. ''Helicosporidium'' infections, although rare, have been discovered around the world and in a diverse range of host organisms. The unique morphology of ''Helicosporidium'' has made it easy to identify, but difficult to classify. ''Helicosporidium'' has at various points been considered to be a protozoan or an ascomycete fungus. It was not until molecular phylogenetics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ava (alga)
Ava or AVA may refer to: Places Asia and Oceania * Ava Kingdom, in upper Burma from 1364 to 1555 ** Inwa, formerly Ava, the capital of Ava Kingdom ** Earl of Ava, a British colonial earldom in Burma * Ava, Iran, Gilan Province, a village * Ivah or Ava, an ancient city in Assyria * Ava railway station, in Lower Hutt, New Zealand * IATA code for Anshun Huangguoshu Airport, China United States * Ava, Alabama, an unincorporated community * Ava, Arkansas, an unincorporated community * Ava, Illinois, a city * Ava, Missouri, a city * Ava, New York, a town * Ava, Ohio, an unincorporated community * Ava (building), a highrise in Seattle, Washington People * Ava (given name) People * Ava (poet) (c. 1060–1127), the first named female writer in any genre in the German language * Ava (wrestler) (born 2001), American professional wrestler * Saint Ava, ninth century Roman Catholic saint * Ava Alice Muriel Astor (1902–1956), American socialite, daughter of Ava Lowle Willing and Joh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AlgaeBase
AlgaeBase is a global species database of information on all groups of algae, both seaweed, marine and freshwater algae, freshwater, as well as sea-grass. History AlgaeBase began in March 1996, founded by Michael D. Guiry, Michael Guiry. Text was copied from this source, which is available under aAttribution 4.0 International (CC BY 4.0)licence. (Sehere. By 2005, the database contained about 65,000 names. In 2013, AlgaeBase and the Flanders Marine Institute (VLIZ) signed an end-user license agreement regarding the intellectual property, Electronic Intellectual Property of AlgaeBase. This allows the World Register of Marine Species (WoRMS) to include taxonomic names of algae in WoRMS, thereby allowing WoRMS, as part of the Aphia database, to make its overview of all described marine species more complete. Synchronisation of the AlgaeBase data with Aphia and WoRMS was undertaken manually until March 2015, but this was very time-consuming, so an online application was developed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |