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Conjugatophyceae
Zygnematophyceae (or Conjugatophyceae) is a class of green algae in the paraphylum streptophyte algae, also referred to as Charophyta, consisting of more than 4000 described species. It contains five orders: the Spirogloeales, the Serritaeniales, the Zygnematales, the Spirogyrales, and the Desmidiales. The Zygnematophyceae are the sister clade of the land plants. The body plan of Zygnematophyceae is simple, and appear to have gone through a secondary loss of morphological complexity. The most basal members are unicellular, but filamentous species have evolved at least five times. They contain genes involved in protection from desiccation that appear to have been derived by horizontal gene transfer from bacteria; the genes are found in plants, Zygnematophyceae, bacteria, but no other organisms. The genes may have helped to enable plants to make the transition to life on land. Sexual reproduction in the Zygnematophyceae takes place through a process called ''conjugation''. Here cel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zygnematophyceae
Zygnematophyceae (or Conjugatophyceae) is a class of green algae in the paraphylum streptophyte algae, also referred to as Charophyta, consisting of more than 4000 described species. It contains five orders: the Spirogloeales, the Serritaeniales, the Zygnematales, the Spirogyrales, and the Desmidiales. The Zygnematophyceae are the sister clade of the land plants. The body plan of Zygnematophyceae is simple, and appear to have gone through a secondary loss of morphological complexity. The most basal members are unicellular, but filamentous species have evolved at least five times. They contain genes involved in protection from desiccation that appear to have been derived by horizontal gene transfer from bacteria; the genes are found in plants, Zygnematophyceae, bacteria, but no other organisms. The genes may have helped to enable plants to make the transition to life on land. Sexual reproduction in the Zygnematophyceae takes place through a process called ''conjugation''. Here c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charophyta
Charophyta () is a group of freshwater green algae, called charophytes (), sometimes treated as a division, yet also as a superdivision or an unranked clade. The terrestrial plants, the Embryophyta emerged within Charophyta, possibly from terrestrial unicellular charophytes, with the class Zygnematophyceae as a sister group. The clade Streptophyta may be formed by placing Embryophyta within the Charophyta. The Embryophyta may already be included in the Charophyta, in which case it is a synonym of the Streptophyta. The sister group of the charophytes are the Chlorophyta. In some charophyte groups, such as the Zygnematophyceae or conjugating green algae, flagella are absent and sexual reproduction does not involve free-swimming flagellate sperm. Flagellate sperm, however, are found in stoneworts ( Charales) and Coleochaetales, orders of parenchymatous charophytes that are the closest relatives of the land plants, where flagellate sperm are also present in all except the coni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zygnemataceae
The Zygnemataceae are a family of filamentous or unicellular, uniseriate (unbranched) green algae. The filaments are septated and reproduction is by conjugation; ''Spirogyra'' is commonly used in schools to demonstrate this kind of reproduction. The family is notable for its diversely shaped chloroplasts, such as stellate in '' Zygnema'', helical in ''Spirogyra'', and flat in ''Mougeotia''. The Zygnemataceae are cosmopolitan, but though all generally occur in the same types of habitats, ''Mougeotia'', ''Spirogyra'', and ''Zygnema'' are by far the most common; in one study across North America, 95% of the Zygnemataceae collected were in these three genera. Classification and identification is primarily by the morphology of the conjugation, which is somewhat rare to find in natural populations of permanent water bodies; when in the vegetative state, the rarer genera resemble the three most common, and are often mistaken for them and catalogued as such. Conjugation can be induced ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Desmidiaceae
The Desmidiaceae are one of four families of charophyte green algae in the order Desmidiales (desmids).See the NCBIbr>webpage on Desmidiaceae Data extracted from the Genera Genera accepted by AlgaeBase AlgaeBase is a global species database of information on all groups of algae, both marine and freshwater, as well as sea-grass. History AlgaeBase began in March 1996, founded by Michael Guiry. Text was copied from this source, which is avail ... were: *'' Actinodontum'' – 3 species *'' Actinotaenium'' – 57 species *'' Allorgeia'' – 2 species *'' Amscottia'' – 2 species *'' Bambusina'' – 6 species *'' Bourellyodesmus'' – 8 species *'' Brachytheca'' – 2 species *'' Calocylindrus'' – 3 species *'' Cosmaridium'' – 1 species *'' Cosmarium'' – 1063 species *'' Cosmocladium'' – 8 species *'' Croasdalea'' – 1 species *'' Cruciangulum'' – 1 species *'' Desmidium'' – 21 species *'' Docidium'' – 37 species *'' Euastridium'' – 3 spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peniaceae
''Penium'' is a genus of green algae, and the sole member of the family Peniaceae.See the NCBI The National Center for Biotechnology Information (NCBI) is part of the United States National Library of Medicine (NLM), a branch of the National Institutes of Health (NIH). It is approved and funded by the government of the United States. The ...br>webpage on Penium Data extracted from the The genus contains about 39 species. References External links Scientific references Scientific databases * AlgaTerra databaseIndex Nominum Genericorum Desmidiales Charophyta genera {{green algae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Closteriaceae
The Closteriaceae are one of four families of Charophyte green algae in the order Order, ORDER or Orders may refer to: * Categorization, the process in which ideas and objects are recognized, differentiated, and understood * Heterarchy, a system of organization wherein the elements have the potential to be ranked a number of ... Desmidiales (desmids).See the NCBIbr>webpage on Closteriaceae Data extracted from the References External links Scientific references Scientific databases Zygnematophyceae families Desmidiales {{green algae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gonatozygaceae
The Gonatozygaceae are one of four families of Charophyte green algae in the order Desmidiales (desmids). Genera , AlgaeBase accepted two genera: * '' Genicularina'' Molinari & Guiry * '' Gonatozygon'' De Bary ( syn. ''Leptocystinema'') ''Genicularia'' is an illegitimate name ''Nomen illegitimum'' (Latin for illegitimate name) is a technical term, used mainly in botany. It is usually abbreviated as ''nom. illeg.'' Although the International Code of Nomenclature for algae, fungi, and plants uses Latin terms for other ki ... for ''Genicularina''. References External links Scientific references Scientific databases Zygnematophyceae families Desmidiales {{green algae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesotaeniaceae
The Mesotaeniaceae are a small family of unicellular green algae known as the "saccoderm desmids". The Mesotaeniaceae appear to be sister or ancestral to the Zygnemataceae. The desmids are a deep branching group of Zygnemataceae. ''Spirotaenia'' was found to be a basal green alga. Genera The Mesotaeniaceae includes the following genera: * '' Ancylonema'' Berggren, 1872 * '' Cylindrocystis'' Meneghini ex De Bary, 1858 * '' Geniculus'' Prescott, 1967 * '' Mesotaenium'' Nägeli, 1849 * '' Netrium'' (Nägeli) Itzigsohn & Rothe, 1856 * '' Nucleotaenium'' Gontcharov & Melkonian, 2010 * '' Planotaenium'' (Ohtani) Petlovany & Palamar-Mordvintseva, 2009 * '' Roya'' West & G.S.West, 1896 * ''Spirotaenia ''Spirotaenia'' is a genus of basal green algae that may be sister to the Chlorokybophyceae. It was previously considered to be part of the Zygnemataceae. It is sexually conjugating, a mode of reproduction that was previously only known in th ...'' Brébisson, 1848 * '' Tortit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
