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Kirchneriella
''Kirchneriella'' is a genus of green algae in the family Selenastraceae. It is found in freshwater habitats, as phytoplankton or metaphyton. The genus name of ''Kirchneriella'' is in honour of Emil Otto Oskar von Kirchner (1851–1925), who was a German botanist and agronomist. The genus was circumscribed by Wilhelm Schmidle in Ber. Naturf. Ges. Freiburg vol.7 on page 82 in 189. Description ''Kirchneriella'' usually consists of colonies of cells within a thin layer of mucilage. Usually four to 16 are present within a colony, but sometimes they are solitary. Cells are crescent-shaped, containing a single chloroplast with one pyrenoid. They are irregularly distributed within the mucilage. Species are distinguished from each other based on cell size and shape. The similar genus ''Pseudokirchneriella'' was split off from ''Kirchneriella''; it differs from this genus in that its cells lack a pyrenoid. Some authors do not recognize the two genera as being distinct. Reproducti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kirchneriella Aperta
''Kirchneriella'' is a genus of green algae in the family Selenastraceae. It is found in freshwater habitats, as phytoplankton or metaphyton. The genus name of ''Kirchneriella'' is in honour of Emil Otto Oskar von Kirchner (1851–1925), who was a German botanist and agronomist. The genus was circumscription (taxonomy), circumscribed by Wilhelm Schmidle in Ber. Naturf. Ges. Freiburg vol.7 on page 82 in 189. Description ''Kirchneriella'' usually consists of colonies of cells within a thin layer of mucilage. Usually four to 16 are present within a colony, but sometimes they are solitary. Cells are crescent-shaped, containing a single chloroplast with one pyrenoid. They are irregularly distributed within the mucilage. Species are distinguished from each other based on cell size and shape. The similar genus ''Pseudokirchneriella'' was split off from ''Kirchneriella''; it differs from this genus in that its cells lack a pyrenoid. Some authors do not recognize the two genera as b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Autospore
Autospores are a type of spores that are produced by algae to enable asexual reproduction and spread. They are non-motile and non-Flagellated cell, flagellated Aplanospore, aplanospores that are generated within a parent cell and have the same shape as the parent cell before their release. Autospores are also known as resting spores. Algae primarily use three different types of spores for asexual reproduction - autospores, Zoospore, zoospores, and aplanospores. Autospores occur in several groups of algae, including ''Eustigmatophyceae'', ''Dinoflagellate, Dinoflagellates'', and green algae. One example of a colonial alga that produces autospores is Dichotomococcus. This alga generates two autospores per reproducing cell, and the autospores escape through a slit in the cell wall and remain attached to the mother cell. Some study on autospores and algae in general include looking into its use for biofuel, animal feed, food supplements, nutraceuticals, and pharmaceuticals. Autospore ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudokirchneriella
''Pseudokirchneriella'' is a genus of green algae in the family Selenastraceae. It is found as phytoplankton in freshwater ponds, lakes, and pools. It has been reported from Europe and North America. Description ''Pseudokirchneriella'' usually consists of colonies of cells within a thin layer of mucilage. Usually two to 32 are present within a colony. Cells are crescent-shaped, with pointed to rounded ends. The cell wall is uniformly smooth without any ornamentation. Cells are uninucleate (with a single nucleus) and a single parietal chloroplast A chloroplast () is a type of membrane-bound organelle, organelle known as a plastid that conducts photosynthesis mostly in plant cell, plant and algae, algal cells. Chloroplasts have a high concentration of chlorophyll pigments which captur .... Cells are irregularly distributed within the mucilage. ''Pseudokirchneriella'' was split off from its congener '' Kirchneriella'' by the absence of a pyrenoid. Not all authors recognize t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selenastraceae
Selenastraceae is a family of green algae in the order Sphaeropleales. Members of this family are common components of the phytoplankton in freshwater habitats worldwide. A few species have been found in brackish and marine habitats, such as in the Baltic Sea. Description The family Selenastraceae includes solitary cells or colonies of cells. Cells are diverse in morphology; they may be coccoid to spindle-shaped in shape, with rounded or pointed ends. They may be sickle-shaped or spirally curved. Cells contain a chloroplast with a pyrenoid. Except in the genus '' Chlorolobion'', the pyrenoid lacks a starch covering, making it difficult to observe using light microscopy. Cells range in size from 5 to 105 μm in length and 1.5 to 6.5 μm in width. Algae in this family reproduce asexually, exclusively by autospores. A distinguishing characteristic of this family is the method of autospore formation: the protoplast divides serially, with divisions being perpendicular to the longer a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emil Otto 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] |
Wilhelm Schmidle
Wilhelm may refer to: People and fictional characters * William Charles John Pitcher, costume designer known professionally as "Wilhelm" * Wilhelm (name), a list of people and fictional characters with the given name or surname Other uses * Wilhelm (name), disambiguation page for people named Wilhelm ** Wilhelm II (1858–1941), king of Prussia and emperor of Germany from 1888 until his abdication in 1918. * Mount Wilhelm, the highest mountain in Papua New Guinea * Wilhelm Archipelago, Antarctica * Wilhelm (crater), a lunar crater * Wilhelm scream, stock sound effect used in many movies and shows See also * Wilhelm scream, a stock sound effect * SS ''Kaiser Wilhelm II'', or USS ''Agamemnon'', a German steam ship * Wilhelmus, the Dutch national anthem * William Helm William Helm (March 9, 1837 – April 10, 1919) was an American Sheep-rearing, sheep farmer and among the early pioneer settlers of Fresno County, California, Fresno County, California. He was instrumental in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphaeropleales Genera
Sphaeropleales is an order of green algae that used to be called Chlorococcales. The order includes some of the most common freshwater planktonic algae such as '' Scenedesmus'' and '' Pediastrum''. The Sphaeropleales includes vegetatively non-motile unicellular, colonial , or filamentous taxa. They have biflagellate zoospores with flagella that are directly opposed in direction (the DO arrangement): '' Sphaeroplea'', '' Atractomorpha'', '' Neochloris'', '' Hydrodictyon'', and '' Pediastrum''. All of these taxa have basal body core connections. Motile cells generally lack cell walls or have only a very fine layer surrounding the cell membrane. Other common characteristics include a robust vegetative cell wall, cup-shaped chloroplasts with large pyrenoids, and relatively large nuclei. With an increase in the number of taxa for which sequence data are available, there is evidence of an expanded DO clade that includes additional zoosporic ('' Bracteacoccus'', '' Schroederia'') an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GBIF
The Global Biodiversity Information Facility (GBIF) is an international organisation that focuses on making scientific data on biodiversity available via the Internet using web services. The data are provided by many institutions from around the world; GBIF's information architecture makes these data accessible and searchable through a single portal. Data available through the GBIF portal are primarily distribution data on plants, animals, fungi, and microbes for the world, and scientific names data. The mission of the GBIF is to facilitate free and open access to biodiversity data worldwide to underpin sustainable development. Priorities, with an emphasis on promoting participation and working through partners, include mobilising biodiversity data, developing protocols and standards to ensure scientific integrity and interoperability, building an informatics architecture to allow the interlinking of diverse data types from disparate sources, promoting capacity building and cataly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrenoid
Pyrenoids are sub-cellular phase-separated micro-compartments found in chloroplasts of many algae,Giordano, M., Beardall, J., & Raven, J. A. (2005). CO2 concentrating mechanisms in algae: mechanisms, environmental modulation, and evolution. ''Annu. Rev. Plant Biol.'', 56, 99-131. and in a single group of land plants, the hornworts.Villarreal, J. C., & Renner, S. S. (2012) Hornwort pyrenoids, carbon-concentrating structures, evolved and were lost at least five times during the last 100 million years. ''Proceedings of the National Academy of Sciences'',109(46), 1873-1887. Pyrenoids are associated with the operation of a carbon-concentrating mechanism (CCM). Their main function is to act as centres of carbon dioxide (CO2) fixation, by generating and maintaining a CO2-rich environment around the photosynthesis, photosynthetic enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO). Pyrenoids therefore seem to have a role analogous to that of carboxysomes in cyanobacteria. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chloroplast
A chloroplast () is a type of membrane-bound organelle, organelle known as a plastid that conducts photosynthesis mostly in plant cell, plant and algae, algal cells. Chloroplasts have a high concentration of chlorophyll pigments which capture the Radiant energy, energy from sunlight and convert it to chemical energy and release oxygen. The chemical energy created is then used to make sugar and other organic molecules from carbon dioxide in a process called the Calvin cycle. Chloroplasts carry out a number of other functions, including fatty acid synthesis, amino acid synthesis, and the immune response in plants. The number of chloroplasts per cell varies from one, in some unicellular algae, up to 100 in plants like ''Arabidopsis'' and wheat. Chloroplasts are highly dynamic—they circulate and are moved around within cells. Their behavior is strongly influenced by environmental factors like light color and intensity. Chloroplasts cannot be made anew by the plant cell and must ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botanist
Botany, also called plant science, is the branch of natural science and biology studying plants, especially Plant anatomy, their anatomy, Plant taxonomy, taxonomy, and Plant ecology, ecology. A botanist or plant scientist is a scientist who specialises in this field. "Plant" and "botany" may be defined more narrowly to include only land plants and their study, which is also known as phytology. Phytologists or botanists (in the strict sense) study approximately 410,000 species of Embryophyte, land plants, including some 391,000 species of vascular plants (of which approximately 369,000 are flowering plants) and approximately 20,000 bryophytes. Botany originated as history of herbalism#Prehistory, prehistoric herbalism to identify and later cultivate plants that were edible, poisonous, and medicinal, making it one of the first endeavours of human investigation. Medieval physic gardens, often attached to Monastery, monasteries, contained plants possibly having medicinal benefit. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
