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Lepraria Sekikaica
''Lepraria sekikaica'' is a species of leprose (powdery) lichen in the family Lecanoraceae. Found in Western Australia, it was formally described as a new species by lichenologist John Elix. It was one of 100 new lichen species published in a single article, helping to highlight the extent of undiscovered global biodiversity. The type specimen was collected by the author in the Boyagin Rock Nature Reserve. It is known from several locations in Western Australia, where it grows on the ground under sheltered rock ledges. The lichen products made by ''Lepraria sekikaica'' include atranorin, homosekikaic acid, 4'-''O''-demethylsekikaic acid, and fragilin as minor products, and sekikaic acid as a major metabolite. The specific epithet refers to the latter compound; ''Lepraria sekikaica'' is the first known in genus ''Lepraria ''Lepraria'' is a genus of leprose crustose lichens that grows on its substrate like patches of granular, caked up, mealy dust grains.A taxonomic r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Alan Elix
John Alan (Jack) Elix (born 1941) emeritus professor in chemistry at the Australian National University, is an organic chemist who has contributed in many fields: lichenology, lichen chemotaxonomy, plant physiology and biodiversity and natural product chemistry. He has authored 2282 species names, and 67 genera in the field of mycology. Education His first degree, B.Sc., and his Ph.D were both in organic chemistry from the University of Adelaide. This was followed by post-doctoral years at the University of Cambridge and then a D.Sc. in natural products chemistry from the Australian National University. Career Elix spent a post doctoral year in 1966 at Cambridge, returning to Australia in 1967 to a lectureship in chemistry at the ANU. He retired as professor of chemistry in 2002, becoming professor emeritus. By 1975 he had already published several papers on the organic chemistry of lichens, and ultimately leading to work on the evolution, taxonomy and phylogeny of liche ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atranorin
Atranorin is a chemical substance produced by some species of lichen. It is a secondary metabolite belonging to a group of compounds known as depsides. Atranorin has analgesic, anti-inflammatory, antibacterial, antifungal, cytotoxic, antioxidant, antiviral, and immunomodulatory properties. In rare cases, people can react allergic Allergies, also known as allergic diseases, refer a number of conditions caused by the hypersensitivity of the immune system to typically harmless substances in the environment. These diseases include hay fever, food allergies, atopic derma ... to atranorin. References Further reading * * * * Polyphenols Lichen products {{organic-compound-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichens Described In 2011
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 (); flat leaf-like structures ( |
Lepraria
''Lepraria'' is a genus of leprose crustose lichens that grows on its substrate like patches of granular, caked up, mealy dust grains.A taxonomic revision of the North American species of Lepraria s.l. that produce divaricatic acid, with notes on the type species of the genus L. incana, James C. Lendemer , Mycologia 103(6): 1216-1229/ref> Members of the genus are List of lichen common names and their genera, commonly called dust lichens.Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, The main vegetative body (thallus) is made of patches of soredia (little balls of algae wrapped in fungus). There are no known mechanisms for sexual reproduction, yet members of the genus continue to speciate. Some species can form marginal lobes and appear squamulose. Because of the morphological simplicity of the thallus and the absence of sexual structures, the composition of lichen products (i.e., secondary metabolites made by lichens) are important character ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botanical Name
A botanical name is a formal scientific name conforming to the '' International Code of Nomenclature for algae, fungi, and plants'' (ICN) and, if it concerns a plant cultigen, the additional cultivar or Group epithets must conform to the ''International Code of Nomenclature for Cultivated Plants'' (ICNCP). The code of nomenclature covers "all organisms traditionally treated as algae, fungi, or plants, whether fossil or non-fossil, including blue-green algae ( Cyanobacteria), chytrids, oomycetes, slime moulds and photosynthetic protists with their taxonomically related non-photosynthetic groups (but excluding Microsporidia)." The purpose of a formal name is to have a single name that is accepted and used worldwide for a particular plant or plant group. For example, the botanical name ''Bellis perennis'' denotes a plant species which is native to most of the countries of Europe and the Middle East, where it has accumulated various names in many languages. Later, the plant was intro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sekikaic Acid
Sekikaic acid is an organic compound in the structural class of chemicals known as depsides. It is found in some lichens. First isolated from '' Ramalina sekika'', it is a fairly common lichen product in ''Ramalina'' and ''Cladonia'', both genera of lichen-forming fungi. The species epithet of the powdery lichen '' Lepraria sekikaica'' refers to the presence of this substance—a rarity in genus ''Lepraria''. Properties In its purified form, sekikaic acid exists as colourless rectangular prisms or rhombic plates. Its molecular formula is C22H2608. It has a melting point of . An ethanolic solution of sekikaic acid reacts with iron(III) chloride to produce a violet colour. Its ultraviolet spectrum has three peaks of maximum absorption (λmax) at 219, 263, and 303 nm. Sekikaic acid has been demonstrated to have several biological activities in laboratory experiments. These include antioxidant activity, inhibition of the enzymes α-glucosidase and α-amylase, hypoglycemic ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichen Product
Lichen products, also known as lichen substances, are organic compounds produced by a lichen. Specifically, they are secondary metabolites. Lichen products are represented in several different chemical classes, including terpenoids, orcinol derivatives, chromones, xanthones, depsides, and depsidones. Over 800 lichen products of known chemical structure have been reported in the scientific literature, and most of these compound are exclusively found in lichens. Examples of lichen products include usnic acid (a dibenzofuran), atranorin (a depside), lichexanthone (a xanthone), salazinic acid (a depsidone), and isolichenan, an α-glucan. Many lichen products have biological activity, and research into these effects is ongoing. Lichen products accumulate on the outer walls of the fungal hyphae, and are quite stable. Crystal deposits can be visualised using scanning electron microscopy. For this reason, even very old herbarium specimens can be analysed. The amount of lichen products i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leprose Lichen
Lichens are composite organisms made up of multiple species: a fungal partner, one or more photosynthetic partners, and sometimes a basidiomycete yeast. They are regularly grouped by their external appearance – a characteristic known as their growth form. Lichenologists have described a dozen of these forms: areolate, byssoid, calicioid, cladoniform, crustose, filamentous, foliose, fruticose, gelatinous, leprose, placoidioid and squamulose. Of these, crustose, foliose and fruticose are the most commonly encountered. With the exception of calicioid lichens, growth forms are based on the appearance of the thallus, which is the vegetative (non-reproductive) part of the lichen. In most species, this form is determined by the lichen's fungal partner, though in a small number, it is instead the photobiont that determines the lichen's morphology. In some growth forms, the outermost layer of the thallus consists of tightly woven fungal . This layer, known as the cortex, may be found o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boyagin Rock
Boyagin Rock is located south west of Brookton and north west of Pingelly in the Wheatbelt region of Western Australia, which is approximately south east of Perth. The Boyagin Rock outcrop rises above the surrounding land and is an crestal area of a granite inselberg within the geological Yilgarn Craton framework. The Boyagin Nature Reserve contains Boyagin Rock, and is widely recognised as one of the few areas of intact original fauna and flora in the Avon Wheatbelt bioregion. It provides refuge for a variety of fauna including numbats, goannas, echidnas and Tammar wallabies. The reserve was established in 1978, and covers an area of 1.21 km2. Aboriginal significance Boyagin Rock is known to the Noongar as "Boogin" and according to the Balardong Noongar it is a site of significance. A traditional story of how the rock came to be is from Noongar Elder Janet Collard who said that her husband (Andy Collard) told the story of how a big Wagyl (dreamtime water snake) wound i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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