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Cetraria Lacunosa
''Platismatia lacunosa'' is a species of corticolous (bark-dwelling), foliose lichen in the family Parmeliaceae. Known predominantly from western North America, it reproduces primarily through sexual means, which is uncommon in the genus. The species is distinguished by its ridged surface and large, folded apothecia (fruiting bodies). Taxonomy ''Platismatia lacunosa'' was first formally described in 1803 by Erik Acharius as a member of the genus ''Cetraria''. William and Chicita Culberson transferred it to the genus ''Platismatia'' in 1968. Phylogenetic analysis has shown ''P. lacunosa'' to be a distinct, monophyletic species within ''Platismatia''. Ancestral state reconstruction suggests that ''P. lacunosa'', a sexually reproducing species, likely evolved from an asexual ancestor. Description The upper thallus surface of ''P. lacunosa'' is greenish gray, gray to almost white, with margins that may become blackened. It is characterized by strong reticulations ri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corticolous Lichen
A corticolous lichen is a lichen that grows on bark.Alan Silverside's Lichen Glossary (a-f), Alan Silverside/ref> This is contrasted with lignicolous lichen, which grows on wood that has had the bark stripped from it,Alan Silverside's Lichen Glossary (g-o), Alan Silverside/ref> and saxicolous lichen, which grows on rock.Alan Silverside's Lichen Glossary (p-z), Alan Silverside/ref> Examples of corticolous lichens include the crustose lichen Crustose lichens are lichens that form a crust which strongly adheres to the Substrate (biology), substrate (soil, rock, tree bark, etc.), making separation from the substrate impossible without destruction. The basic structure of crustose lichen ... '' Graphis plumierae'', foliose lichen '' Melanohalea subolivacea'' and the fruticose '' Bryoria fuscescens''.Náttúrufræðistofnun Íslands celandic Institute of Natural History(1996). Válisti 1: Plöntur.' (in Icelandic) Reykjavík: Náttúrufræðistofnun Íslands. See also * Phyllopsora ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudocyphella
Pseudocyphellae (singular ''pseudocyphella'') are structures in lichens that appear as tiny pores on the outer surface (the cortex) of the lichen. They are caused when there is a break in the cortex of the lichen, and the medullary hyphae extend to the surface. Pseudocyphellae are the same colour as the medulla of the lichen, which is generally white, but can be yellow in some species of '' Pseudocyphellaria'' and in ''Bryoria fremontii''. The presence/absence, abundance, colour, and shape of pseudocyphellae can all be diagnostic features used to identify different species. They facilitate gas exchange through the surface of the lichen, and may provide an adaptive advantage in temperate In geography, the temperate climates of Earth occur in the middle latitudes (approximately 23.5° to 66.5° N/S of the Equator), which span between the tropics and the polar regions of Earth. These zones generally have wider temperature ran ... environments. References *Brodo, I. M., S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichens Of North America
Irwin Murray Brodo (born November 7, 1935 in New York City) is an emeritus scientist at the Canadian Museum of Nature, in Ottawa, Ontario, Canada. He is an authority on the identification and biology of lichens. Early life and education Brodo grew up in the Bronx and attended City College in Manhattan as an undergraduate. He went on to do his graduate studies at Columbia University, and received a master's degree from Cornell University. He earned a Ph.D. in lichenology under the supervision of Henry Imshaug at Michigan State University. Career and research In 1965, Brodo was hired by the National Museum of Canada (now the Canadian Museum of Nature), where he continues to work as a research scientist emeritus. Over his career, he has built the lichen collection (CANL) into one of the best in North America. His research includes in-depth studies on challenging genera such as ''Bryoria'', ''Lecanora'', and ''Ochrolechia''. His 1968 work on the lichens of Long Island and the ef ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichens Described In 1803
A lichen ( , ) is a hybrid colony of algae or cyanobacteria living symbiotically among filaments of multiple fungus species, along with yeasts and bacteria embedded in the cortex or "skin", in a mutualistic relationship.Introduction to Lichens – An Alliance between Kingdoms . University of California Museum of Paleontology. . Lichens are the lifeform that first brought the term symbiosis (as ''Symbiotismus'') into biological context. Lichens have since been recognized as important actors in and producers which many higher trophic feeders feed on, such as reindeer, gastropods, nematodes, mites, and springtails. Lich ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichen Species
A lichen ( , ) is a hybrid colony (biology), colony of algae or cyanobacteria living symbiotically among hypha, filaments of multiple fungus species, along with yeasts and bacteria embedded in the cortex or "skin", in a mutualism (biology), mutualistic relationship.Introduction to Lichens – An Alliance between Kingdoms . University of California Museum of Paleontology. . Lichens are the lifeform that first brought the term symbiosis (as ''Symbiotismus'') into biological context. Lichens have since been recognized as important actors in nutrient cycling and producers which many higher trophic feeders feed on, such as reindeer, gastropods, nematodes, mites, and springtails. Lichens have properties different from those of their component organisms. They come in man ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russian Far East
The Russian Far East ( rus, Дальний Восток России, p=ˈdalʲnʲɪj vɐˈstok rɐˈsʲiɪ) is a region in North Asia. It is the easternmost part of Russia and the Asia, Asian continent, and is coextensive with the Far Eastern Federal District, which encompasses the area between Lake Baikal and the Pacific Ocean. The area's largest city is Khabarovsk, followed by Vladivostok. The region shares land borders with the countries of Mongolia, China, and North Korea to its south, as well as maritime boundary, maritime boundaries with Japan to its southeast, and with the United States along the Bering Strait to its northeast. Although the Russian Far East is often considered as a part of Siberia abroad, it has been historically categorized separately from Siberia in Russian regional schemes (and previously during the history of the Soviet Union, Soviet era when it was called the Soviet Far East). Terminology In Russia, the region is usually referred to as simply th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commander Islands
The Commander Islands, Komandorski Islands, or Komandorskie Islands (, ''Komandorskiye ostrova'') are a series of islands in the Russian Far East, a part of the Aleutian Islands, located about east of the Kamchatka Peninsula in the Bering Sea. Treeless and sparsely populated, the islands consist of Bering Island, ; Medny Island, ; and fifteen islets and rocks. The largest of the latter are Tufted Puffin Rock ''(Kamen Toporkov'' or ''Ostrov Toporkov)'', , and Kamen Ariy, which are between west of the only settlement, Nikolskoye. Administratively, the Commanders compose the Aleutsky District of the Kamchatka Krai in Russia. In 2005, the Comandorsky State Nature Reserve was nominated for the List of World Heritage Sites in Russia of UNESCO. Geography The Commander Islands archipelago consists of 15 islands and is a part of a submarine volcanic ridge extending from Alaska to Kamchatka dated by the beginning of Paleogene (60-70 million years ago). The islands are the w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fumarprotocetraric Acid
Fumarprotocetraric acid is a chemical compound with the chemical formula . It is a secondary metabolite produced by a variety of lichens. Occurrence Fumarprotocetraric acid is mainly known for its occurrence in Iceland moss (''Cetraria islandica''), where it is present in a mass fraction of 1–2% (dried thallus). In addition, fumarprotocetraric acid has been detected in many other lichens, including: * '' Callopisma teicholytum'' [] * ''Cetraria fahluensis'' [] * ''Cetraria islandica'' [] * '' Cladina rangiferina'' [] * ''Cladina silvatica'' [] * ''Cladonia chlorophaea'' [] * ''Cladonia fimbriata'' [] var. apolepta [] f. coniocraea [] * ''Cladonia fimbriata'' [] var. cornuto-radiata [] * ''Cladonia fimbriata'' [] var. simplex [] f. major [] * ''Cladonia fimbriata'' [] var. simplex [] f. minor [] * ''Cladonia foliacea'' [] var. alcicornis [] * ''Cladonia foliacea'' [] var. convoluta [] * ''Cladonia furcata'' [] var. pinnata [] * ''Cladonia furcata'' [] var. racemosa [] * ''Cladon ... [...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 have an allergic reaction Allergies, also known as allergic diseases, are various conditions caused by hypersensitivity of the immune system to typically harmless substances in the environment. These diseases include Allergic rhinitis, hay fever, Food allergy, food al ... to atranorin. References Further reading * * * * Polyphenols Lichen products {{organic-compound-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apothecia
An ascocarp, or ascoma (: ascomata), is the fruiting body ( sporocarp) of an ascomycete phylum fungus. It consists of very tightly interwoven hyphae and millions of embedded asci, each of which typically contains four to eight ascospores. Ascocarps are most commonly bowl-shaped (apothecia) but may take on a spherical or flask-like form that has a pore opening to release spores (perithecia) or no opening (cleistothecia). Classification The ascocarp is classified according to its placement (in ways not fundamental to the basic taxonomy). It is called ''epigeous'' if it grows above ground, as with the morels, while underground ascocarps, such as truffles, are termed ''hypogeous''. The structure enclosing the hymenium is divided into the types described below (apothecium, cleistothecium, etc.) and this character ''is'' important for the taxonomic classification of the fungus. Apothecia can be relatively large and fleshy, whereas the others are microscopic—about the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhizine
In lichens, rhizines are multicellular root-like structures arising mainly from the lower surface. A lichen with rhizines is termed rhizinate, while a lichen lacking rhizines is termed erhizinate. Rhizines serve only to anchor the lichen to their substrate; they do not absorb nutrients, as plant roots do. Characteristics of the rhizines are used to identify lichens, for example, whether they are dense or sparse, uniformly distributed or clumped in specific areas, and straight or branched. Only foliose lichens may possess rhizines, not crustose or fruticose lichens, which lack a lower cortex. Rhizohyphae are a type of attachment structure on some lichens. Rhizohyphae are more slender than rhizines and are one cell thick in diameter. Rhizohyphae often occur as a felt-like hypha A hypha (; ) is a long, branching, filamentous structure of a fungus, oomycete, or actinobacterium. In most fungi, hyphae are the main mode of vegetative growth, and are collectively called a mycel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
