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Agonimia Octospora
''Agonimia octospora'' is a species of corticolous, (bark-dwelling) squamulose (scaley) lichen in the family Verrucariaceae. It was formally described as a new species in 1978 by lichenologists Brian John Coppins and Peter Wilfred James. The type specimen was collected in Glengarriff Forest in (West Cork (Ireland), where it was found growing on the bark of oak. Characteristics of the lichen include its colourless 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 ...s that number eight per ascus, and its tiny squamules (up to 0.3 mm long) that are closely attached (''adpressed'') on its substrate. Its spores typically measure 60–75 by 20–26 μm. The lichen is found in Europe and South America. References Verrucariales Lichens described in 1978 Lich ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brian John Coppins
Brian John Coppins (born 1949) is a botanist and lichenologist, considered a world authority on crustose lichens and a leading expert on the genus '' Micarea''. Education Coppins' interest in lichens was sparked during a field trip to the Scottish island of Handa while studying at Tunbridge Wells Technical School for Boys. While still an undergraduate at the University of Hull, Coppins was the co-author, with D. W. Shimwell, of an important study of lichen dynamics in managed heathland. After receiving his B.Sc. in 1970, Coppins became a graduate student at King's College London and studied lichen ecophysiology under the supervision of Francis Rose but he changed the focus of his doctoral studies to the taxonomy of '' Micarea'' species found in Europe. Career In 1974 was appointed as an ascomycete taxonomist in the herbarium of the Royal Botanic Garden Edinburgh (RBGE). He spent his career there, retiring in May 2009. He received his Ph.D. in 1982 from University College Londo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ascus
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 "bourrelet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichens Of South America
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 ( |
Lichens Of Europe
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 ( |
Lichens Described In 1978
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 ( |
Verrucariales
Verrucariales is an order of ascomycetous fungi within the subclass Chaetothyriomycetidae of the class Eurotiomycetes. Although most of the Verrucariales are lichenised, the family Sarcopyreniaceae consists of 11 species of lichenicolous (lichen-dwelling) fungi. Phylogenomic analysis suggests that the divergence between the lichenized Verrucariales and nonlichenized Chaetothyriales The Chaetothyriales are an order of ascomycetous fungi in the class Eurotiomycetes and within the subclass Chaetothyriomycetidae. The order was circumscribed in 1987 by mycologist Margaret Elizabeth Barr-Bigelow. Families and genera , Species ... occurred about 131 million years ago. Genera of uncertain placement There are some genera in the Verrucariales that have not been placed with certainty into any family. These are: *'' Botryolepraria'' – 2 spp. *'' Gemmaspora'' – 1 sp. *'' Kalbiana'' – 1 sp. *'' Merismatium'' – 10 spp. References Ascomycota orders Lichen orders ... [...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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Substrate (biology)
In biology, a substrate is the surface on which an organism (such as a plant, fungus, or animal) lives. A substrate can include biotic or abiotic materials and animals. For example, encrusting algae that lives on a rock (its substrate) can be itself a substrate for an animal that lives on top of the algae. Inert substrates are used as growing support materials in the hydroponic cultivation of plants. In biology substrates are often activated by the nanoscopic process of substrate presentation. In agriculture and horticulture * Cellulose substrate * Expanded clay aggregate (LECA) * Rock wool * Potting soil * Soil In animal biotechnology Requirements for animal cell and tissue culture Requirements for animal cell and tissue culture are the same as described for plant cell, tissue and organ culture (In Vitro Culture Techniques: The Biotechnological Principles). Desirable requirements are (i) air conditioning of a room, (ii) hot room with temperature recorder, (iii) microscope r ... [...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 "bourrelet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peter Wilfred James
Peter Wilfred James (1930–2014) was an English botanist and lichenologist. He was a pioneer in the study of lichens as environmental indicators, especially of atmospheric pollution. Early life and education Peter W. James grew up in Sutton Coldfield, which was then a rural suburb of Birmingham and his interests in natural history and exploring the countryside were encouraged by his older sister. His father was a headteacher. James attended Bishop Vesey's Grammar School in Warwickshire from 1943 until 1949. He was awarded a state scholarship that supported his university study. He graduated with a First class B.Sc. in botany from the University of Liverpool in 1952 with a minor in zoology (1951). There he enrolled as a Ph.D. student with the intention of studying lichenology, having been inspired after a visit to Bala in North Wales. However his supervisor, S. Burfield, died. At this time very few scientists specialised in the study of lichens. His new supervisor advised James ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Cork
West Cork ( ga, Iarthar Chorcaí) is a tourist region and municipal district in County Cork, Ireland. As a municipal district, West Cork falls within the administrative area of Cork County Council, and includes the towns of Bantry, Castletownbere, Clonakilty, Dunmanway, Schull and Skibbereen, and the villages of Baltimore, Ballydehob, Courtmacsherry, Drimoleague, Durrus, Glengarriff, Leap, Rosscarbery, Timoleague and Union Hall. The westernmost part of the region consists of three main peninsulas: Beara, Sheep's Head and Mizen Head. Islands which lie off West Cork include Bere Island, Sherkin Island and Cape Clear. History and administration The area's pre-history is evident in the many Iron Age burial monuments, including a large number of megalithic tombs, dolmens, standing stones and stone circles. West Cork has had a distinct identity from at least the ancient Dáirine kingdom of Corcu Loígde which once covered much of the area. The historic baronies of Carbery, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
