|
Gyalecta Ancistrospora
''Gyalecta ancistrospora'' is a species of saxicolous lichen, saxicolous (rock-dwelling), crustose lichen in the family Gyalectaceae. Found in Korea, it was species description, formally described as a new species in 2014 by lichenologists André Aptroot and Kwang-Hee Moon. The type (biology), type specimen was collected by the first author from Mount Juwang (Cheongsong County, North Gyeongsang Province) at an altitude between ; there, it was found growing on siliceous rock. It is only known to occur in this area, where it grows on boulders shaded by trees in forest. Description The lichen has a thin, pale greenish-grey, crust-like thallus that covers areas of up to about . The photobiont partner is Trebouxiophyceae, trebouxioid (spherical, unicellular green algae). The ascomata are sessility (botany), sessile, and measure 0.3–0.6 mm in diameter; they have a flat, dull orange disc with a pale pinkish-orange margin. All spot test (lichen), chemical spot tests are negative, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
André Aptroot
André Aptroot (Heemskerk, 1961) is a Dutch mycologist and lichenologist. In 1993 he did his PhD at the University of Utrecht under the supervision of Robbert Gradstein (nl). His dissertation was titled "Systematic studies on pyrenocarpous lichens and related fungi". He specializes in fungi and lichens on which he has several hundreds of publications to his name. He has worked as curator at Centraalbureau voor Schimmelcultures (now Westerdijk Institute). Aptroot is the founder of the Consultancy for Bryology and Lichenology, which is located in Soest where there is a herbarium with a collection of lichens mainly from the Netherlands and the tropics. From 2008 he has been collection manager at Pinetum Blijdenstein (nl) in Hilversum. He is a member of the International Association for Lichenology and the American Bryological and Lichenological Society. He is a visiting professor at the Federal University of Mato Grosso do Sul in Campo Grande, Brazil. Because of Aptroot's br ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spot Test (lichen)
A spot test in lichenology is a spot analysis used to help identify lichens. It is performed by placing a drop of a chemical on different parts of the lichen and noting the colour change (or lack thereof) associated with application of the chemical. The tests are routinely encountered in dichotomous keys for lichen species, and they take advantage of the wide array of lichen products produced by lichens and their uniqueness among taxa. As such, spot tests reveal the presence or absence of chemicals in various parts of a lichen. They were first proposed by the botanist William Nylander in 1866. Three common spot tests use either 10% aqueous KOH solution (K test), saturated aqueous solution of bleaching powder or calcium hypochlorite (C test), or 5% alcoholic ''p''-phenylenediamine solution (P test). The colour changes occur due to presence of particular secondary metabolites in the lichen. There are several other less frequently used spot tests of more limited use that are empl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichens Described In 2014
A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.Introduction to Lichens – An Alliance between Kingdoms . University of California Museum of Paleontology. Lichens have properties different from those of their component organisms. They come in many colors, sizes, and forms and are sometimes plant-like, but are not s. They may have tiny, leafless branches (); flat leaf-like structures ( |
Lichen Species
A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.Introduction to Lichens – An Alliance between Kingdoms . University of California Museum of Paleontology. Lichens have properties different from those of their component organisms. They come in many colors, sizes, and forms and are sometimes plant-like, but are not s. They may have tiny, leafless branches ( fruticose); flat leaf-like structures ( |
Gyalectales
''Gyalectales'' is an order of lichen-forming fungi in the class Lecanoromycetes. It contains 5 families, 15 genera and about 550 species. Taxonomy The Gyalectales were introduced in a 1974 publication by Aino Henssen and Martin Jahns, but not formally published until 1986 by David Hawksworth and Ove Eriksson. Phylogeny An early (2002) phylogenetics study showed that the order Ostropales, as was then circumscribed, was paraphyletic, and proposed that the Ostropales sensu lato included the Gyalectales and Trapeliaceae. Although they had traditionally been considered to be only distantly related, molecular studies suggested a much closer phylogenetic relationship. As a result, of the molecular data, Kauff and Lutzoni subsumed the Gyalectales into the Ostropales, as the latter name was published earlier (1932 vs. 1986). In 2018, Kraichak and colleagues used a recently developed "temporal phylogenetic" approach to identify temporal bands for specific taxonomic ranks. Base ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gyalecta Ulleungdoensis
''Gyalecta'' is a genus of fungi in the family Gyalectaceae that contains 50 species. ''Gyalecta'' was circumscribed by lichenologist Erik Acharius in 1808. Selected species *''Gyalecta ancistrospora'' *'' Gyalecta arbuti'' *'' Gyalecta azorellae'' *''Gyalecta bicellulata'' *''Gyalecta biformis'' *'' Gyalecta calcicola'' *'' Gyalecta caudata'' *''Gyalecta caudiospora'' *''Gyalecta coralloidea'' *''Gyalecta derivata'' *''Gyalecta flotovii'' *''Gyalecta foveolaris'' *''Gyalecta geoica'' *''Gyalecta gyalizella'' *''Gyalecta herculina'' *''Gyalecta himalayensis'' *''Gyalecta hokkaidica'' *'' Gyalecta incarnata'' *''Gyalecta jenensis'' *''Gyalecta kibiensis'' *'' Gyalecta lumbrispora'' *'' Gyalecta lyngei'' *''Gyalecta mediterranea'' *'' Gyalecta nidarosiensis'' *'' Gyalecta nigritella'' *'' Gyalecta obesispora'' *'' Gyalecta ophiospora'' *'' Gyalecta pellucida'' *'' Gyalecta pittieriana'' *''Gyalecta russula'' *'' Gyalecta saxatilis'' *''Gyalecta stellar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gyalecta Jenensis
''Gyalecta'' is a genus of fungi in the family Gyalectaceae that contains 50 species. ''Gyalecta'' was circumscription (taxonomy), circumscribed by lichenologist Erik Acharius in 1808. Selected species *''Gyalecta ancistrospora'' *''Gyalecta arbuti'' *''Gyalecta azorellae'' *''Gyalecta bicellulata'' *''Gyalecta biformis'' *''Gyalecta calcicola'' *''Gyalecta caudata'' *''Gyalecta caudiospora'' *''Gyalecta coralloidea'' *''Gyalecta derivata'' *''Gyalecta flotovii'' *''Gyalecta foveolaris'' *''Gyalecta geoica'' *''Gyalecta gyalizella'' *''Gyalecta herculina'' *''Gyalecta himalayensis'' *''Gyalecta hokkaidica'' *''Gyalecta incarnata'' *''Gyalecta jenensis'' *''Gyalecta kibiensis'' *''Gyalecta lumbrispora'' *''Gyalecta lyngei'' *''Gyalecta mediterranea'' *''Gyalecta nidarosiensis'' *''Gyalecta nigritella'' *''Gyalecta obesispora'' *''Gyalecta ophiospora'' *''Gyalecta pellucida'' *''Gyalecta pittieriana'' *''Gyalecta russula'' *''Gyalecta saxatilis'' *''Gy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Micrometre
The micrometre ( international spelling as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American spelling), also commonly known as a micron, is a unit of length in the International System of Units (SI) equalling (SI standard prefix "micro-" = ); that is, one millionth of a metre (or one thousandth of a millimetre, , or about ). The nearest smaller common SI unit is the nanometre, equivalent to one thousandth of a micrometre, one millionth of a millimetre or one billionth of a metre (). The micrometre is a common unit of measurement for wavelengths of infrared radiation as well as sizes of biological cells and bacteria, and for grading wool by the diameter of the fibres. The width of a single human hair ranges from approximately 20 to . The longest human chromosome, chromosome 1, is approximately in length. Examples Between 1 μm and 10 μm: * 1–10 μm – length of a typical bacterium * 3–8 μm – width of st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Septum
In biology, a septum (Latin for ''something that encloses''; plural septa) is a wall, dividing a cavity or structure into smaller ones. A cavity or structure divided in this way may be referred to as septate. Examples Human anatomy * Interatrial septum, the wall of tissue that is a sectional part of the left and right atria of the heart * Interventricular septum, the wall separating the left and right ventricles of the heart * Lingual septum, a vertical layer of fibrous tissue that separates the halves of the tongue. * Nasal septum: the cartilage wall separating the nostrils of the nose * Alveolar septum: the thin wall which separates the alveoli from each other in the lungs * Orbital septum, a palpebral ligament in the upper and lower eyelids * Septum pellucidum or septum lucidum, a thin structure separating two fluid pockets in the brain * Uterine septum, a malformation of the uterus * Vaginal septum, a lateral or transverse partition inside the vagina * Intermuscu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ascospore
An ascus (; ) is the sexual spore-bearing cell produced in ascomycete fungi. Each ascus usually contains eight ascospores (or octad), produced by meiosis followed, in most species, by a mitotic cell division. However, asci in some genera or species can occur in numbers of one (e.g. '' Monosporascus cannonballus''), two, four, or multiples of four. In a few cases, the ascospores can bud off conidia that may fill the asci (e.g. '' Tympanis'') with hundreds of conidia, or the ascospores may fragment, e.g. some '' Cordyceps'', also filling the asci with smaller cells. Ascospores are nonmotile, usually single celled, but not infrequently may be coenocytic (lacking a septum), and in some cases coenocytic in multiple planes. Mitotic divisions within the developing spores populate each resulting cell in septate ascospores with nuclei. The term ocular chamber, or oculus, refers to the epiplasm (the portion of cytoplasm not used in ascospore formation) that is surrounded by the "bou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gyalecta
''Gyalecta'' is a genus of fungi in the family Gyalectaceae that contains 50 species. ''Gyalecta'' was circumscribed by lichenologist Erik Acharius Erik Acharius (10 October 1757 – 14 August 1819) was a Swedish botanist who pioneered the taxonomy of lichens and is known as the "father of lichenology." Acharius was famously the last pupil of Carl Linnaeus. Life Acharius was born in 1 ... in 1808. Selected species *'' Gyalecta ancistrospora'' *'' Gyalecta arbuti'' *'' Gyalecta azorellae'' *'' Gyalecta bicellulata'' *'' Gyalecta biformis'' *'' Gyalecta calcicola'' *'' Gyalecta caudata'' *'' Gyalecta caudiospora'' *'' Gyalecta coralloidea'' *'' Gyalecta derivata'' *'' Gyalecta flotovii'' *'' Gyalecta foveolaris'' *'' Gyalecta geoica'' *'' Gyalecta gyalizella'' *'' Gyalecta herculina'' *'' Gyalecta himalayensis'' *'' Gyalecta hokkaidica'' *'' Gyalecta incarnata'' *'' Gyalecta jenensis'' *'' Gyalecta kibiensis'' *'' Gyalecta lumbrispora'' *'' Gyalecta l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thin-layer Chromatography
Thin-layer chromatography (TLC) is a chromatography technique used to separate non-volatile mixtures. Thin-layer chromatography is performed on a sheet of an inert substrate such as glass, plastic, or aluminium foil, which is coated with a thin layer of adsorbent material, usually silica gel, aluminium oxide (alumina), or cellulose. This layer of adsorbent is known as the stationary phase. After the sample has been applied on the plate, a solvent or solvent mixture (known as the mobile phase) is drawn up the plate via capillary action. Because different analytes ascend the TLC plate at different rates, separation is achieved. It may be performed on the analytical scale as a means of monitoring the progress of a reaction, or on the preparative scale to purify small amounts of a compound. TLC is an analytical tool widely used because of its simplicity, relative low cost, high sensitivity, and speed of separation. TLC functions on the same principle as all chromatography: a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
