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Nostocaceae
The Nostocaceae are a family of cyanobacteria that forms filament-shaped colonies enclosed in mucus or a gelatinous sheath. Some genera in this family are found primarily in fresh water (such as ''Nostoc''), while others are found primarily in salt water (such as '' Nodularia''). Other genera (e.g. ''Anabaena'') may be found in both fresh and salt water. Most benthic algae of the order Nostocales belong to this family. Like other cyanobacteria, these bacteria sometimes contain photosynthetic pigments in their cytoplasm to perform photosynthesis. The particular pigments they contain gives the cells a bluish-green color. Species of the Nostocaceae are particularly known for their nitrogen-fixing abilities, and they form symbiotic relationships with certain plants, such as the mosquito fern, cycads, and hornworts. The cyanobacteria provide nitrogen to their hosts. Certain species of ''Anabaena'' have been used on rice paddy fields. Mosquito ferns carrying the cyanobacteria grow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nostoc
''Nostoc'', also known as star jelly, troll’s butter, spit of moon, fallen star, witch's butter (not to be confused with the fungi commonly known as witches' butter), and witch’s jelly, is the most common genus of cyanobacteria found in various environments that may form colonies composed of filaments of moniliform cells in a gelatinous sheath of polysaccharides. ''Nostoc'' is a genus of photosynthetic, Gram-negative cyanobacteria that can be found in both terrestrial and aquatic environments. It may also grow symbiotically within the tissues of plants, providing nitrogen to its host through the action of terminally differentiated cells known as heterocysts. ''Nostoc'' is a genus that includes many species that are diverse in morphology, habitat distribution, and ecological function. ''Nostoc'' can be found in soil, on moist rocks, at the bottom of lakes and springs, and rarely in marine habitats. It may also be found in terrestrial temperate, desert, tropical, or polar env ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richelia
''Richelia'' is a genus of nitrogen-fixing, filamentous, heterocystous and cyanobacteria. It contains the single species ''Richelia intracellularis''. They exist as both free-living organisms as well as symbionts within potentially up to 13 diatoms distributed throughout the global ocean. As a symbiont, ''Richelia'' can associate epiphytically and as endosymbionts within the periplasmic space between the cell membrane and cell wall of diatoms. Morphology ''Richelia'' are made up of filaments called trichomes, which are fine hair-like structures that grow out of a myriad of plant species, though their presence as free-living organisms in the marine environment is rare. The number of trichomes ''Richelia'' have in each diatom host varies. The trichomes serve the purpose of nitrogen fixation as well as nutrient exchange with host diatoms. The location of ''Richelia'' within their various diatom symbionts is not fully known, though it is commonly assumed to be within the diatom's p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cylindrospermum
''Cylindrospermum'' is a genus of filamentous cyanobacteria found in terrestrial and aquatic environments. In terrestrial ecosystems, ''Cylindrospermum'' is found in soils, and in aquatic ones, it commonly grows as part of the periphyton on aquatic plants. The genus is heterocystous (nitrogen-fixing Nitrogen fixation is a chemical process by which molecular nitrogen (), with a strong triple covalent bond, in the air is converted into ammonia () or related nitrogenous compounds, typically in soil or aquatic systems but also in industry. Atmos ...) cyanobacteria. References Nostocaceae Cyanobacteria genera Taxa named by Friedrich Traugott Kützing {{cyanobacteria-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wollea
''Wollea'' is a genus of filamentous, heterocystous cyanobacteria that form macroscopic colonies in freshwater habitats. The genus produces akinetes and is known to reproduce with hormogonia. The type species In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specime ... for the genus is '' Wollea saccata'' ( Wolle) Bornet & Flahault, 1886. References External links * Nostocaceae Cyanobacteria genera Taxa named by Jean-Baptiste Édouard Bornet {{cyanobacteria-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrocoryne (alga)
''Hydrocoryne'' is a genus of cyanobacteria belonging to the family Nostocaceae The Nostocaceae are a family of cyanobacteria that forms filament-shaped colonies enclosed in mucus or a gelatinous sheath. Some genera in this family are found primarily in fresh water (such as ''Nostoc''), while others are found primarily in .... Species: * ''Hydrocoryne spongiosa'' Schwabe ex Bornet & Flahault References {{Taxonbar, from=Q61946109 Nostocales Cyanobacteria genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anabaena Spiroides
''Anabaena'' is a genus of filamentous cyanobacteria that exist as plankton. They are known for nitrogen-fixing abilities, and they form symbiotic relationships with certain plants, such as the mosquito fern. They are one of four genera of cyanobacteria that produce neurotoxins, which are harmful to local wildlife, as well as farm animals and pets. Production of these neurotoxins is assumed to be an input into its symbiotic relationships, protecting the plant from grazing pressure. A DNA sequencing project was undertaken in 1999, which mapped the complete genome of ''Anabaena'', which is 7.2 million base pairs long. The study focused on heterocysts, which convert nitrogen into ammonia. Certain species of ''Anabaena'' have been used on rice paddy fields, proving to be an effective natural fertilizer. Nitrogen fixation by ''Anabaena'' Under nitrogen-limiting conditions, vegetative cells differentiate into heterocysts at semiregular intervals along the filaments. Heterocyst c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean-Baptiste Édouard Bornet
Jean-Baptiste Édouard Bornet (September 2, 1828, Guérigny – December 18, 1911, Paris) was a French botanist. Life Bornet studied medicine in Paris, and in 1886 became a member of the French Académie des sciences. With Gustave Thuret, he was co-author of ''Notes algologiques'' (1876-1880) and the ''Études phycologiques'' (1878), both works being published after Thuret's death in 1875. He helped establish the nature of lichens and was the first to find the reproductive process of red algae. In the field of lichenology, he wrote ''Recherches sur les gonidies des lichens'' (1873). With Charles Flahault, he published on Nostocaceae: ''Revision des Nostocacées héterocystées'' (1886–88). Awards and honours In 1877, botanist Munier-Chalmas published '' Bornetella'' is a genus of green algae in the family Dasycladaceae and named in Jean-Baptiste Édouard Bornet's honor. Bornet was elected a member of the Royal Swedish Academy of Sciences in 1888. He was awarded the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anabaena
''Anabaena'' is a genus of filamentous cyanobacteria that exist as plankton. They are known for nitrogen-fixing abilities, and they form symbiotic relationships with certain plants, such as the mosquito fern. They are one of four genera of cyanobacteria that produce neurotoxins, which are harmful to local wildlife, as well as farm animals and pets. Production of these neurotoxins is assumed to be an input into its symbiotic relationships, protecting the plant from grazing pressure. A DNA sequencing project was undertaken in 1999, which mapped the complete genome of ''Anabaena'', which is 7.2 million base pairs long. The study focused on heterocysts, which convert nitrogen into ammonia. Certain species of ''Anabaena'' have been used on rice paddy fields, proving to be an effective natural fertilizer. Nitrogen fixation by ''Anabaena'' Under nitrogen-limiting conditions, vegetative cells differentiate into heterocysts at semiregular intervals along the filaments. Heterocyst c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oskar Von Kirchner
Emil Otto Oskar von Kirchner (15 September 1851, in Breslau – 25 April 1925, in Venice) was a German botanist and agronomist. He studied botany at the University of Breslau, receiving his doctorate in 1873 with a dissertation on the botanical writings of Theophrastus. After graduation, he worked as an assistant at the pomology institute of the agricultural academy in Proskau. From 1881 to 1917 he was a professor of botany at the Agricultural Academy in Hohenheim. The phycological genera; ''Kirchneria'' (in the family Polypodiopsida), '' Kirchneriella'' (in the family Selenastraceae), ''Kirchneriellopsis'' and ''Kirchneriellosaccus'', all commemorate his name. Selected works * ''Die mikroskopische Pflanzen-und Thierwelt des Süsswassers'' (with Friedrich Blochmann, 1885/86) – The microscopic freshwater plant and animal world. * ''Die Krankheiten und Beschädigungen unserer landwirtschaftlichen Kulturpflanzen : eine Anleitung zu ihrer Erkennung und Bekämpfung fur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symbiosis
Symbiosis (from Greek , , "living together", from , , "together", and , bíōsis, "living") is any type of a close and long-term biological interaction between two different biological organisms, be it mutualistic, commensalistic, or parasitic. The organisms, each termed a symbiont, must be of different species. In 1879, Heinrich Anton de Bary defined it as "the living together of unlike organisms". The term was subject to a century-long debate about whether it should specifically denote mutualism, as in lichens. Biologists have now abandoned that restriction. Symbiosis can be obligatory, which means that one or more of the symbionts depend on each other for survival, or facultative (optional), when they can generally live independently. Symbiosis is also classified by physical attachment. When symbionts form a single body it is called conjunctive symbiosis, while all other arrangements are called disjunctive symbiosis."symbiosis." Dorland's Illustrated Medical Dictionary. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nitrogen Fixation
Nitrogen fixation is a chemical process by which molecular nitrogen (), with a strong triple covalent bond, in the air is converted into ammonia () or related nitrogenous compounds, typically in soil or aquatic systems but also in industry. Atmospheric nitrogen is molecular dinitrogen, a relatively nonreactive molecule that is metabolically useless to all but a few microorganisms. Biological nitrogen fixation or ''diazotrophy'' is an important microbials mediated process that converts dinitrogen (N2) gas to ammonia (NH3) using the nitrogenase protein complex (Nif). Nitrogen fixation is essential to life because fixed inorganic nitrogen compounds are required for the biosynthesis of all nitrogen-containing organic compounds, such as amino acids and proteins, nucleoside triphosphates and nucleic acids. As part of the nitrogen cycle, it is essential for agriculture and the manufacture of fertilizer. It is also, indirectly, relevant to the manufacture of all nitrogen chemical c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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