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Nephroma Flavorhizinatum
''Nephroma'' is a genus of medium to large foliose lichens. The genus has a widespread distribution. They are sometimes called kidney lichens, named after the characteristic kidney-shaped apothecia that they produce on the lower surface of their lobe tips, which often curl upwards and thus are visible from above. Sterile specimens that do not have apothecia can look somewhat like ''Melanelia'', ''Peltigera'', ''Platismatia'', or ''Asahinea''. Most species grow either on mossy ground or rocks, or on trees. All species of ''Nephroma'' contain cyanobacteria (in the genus ''Nostoc'') as a photobiont, which allows the organism to nitrogen fixation, fix nitrogen. In some species the cyanobacteria is the sole photobiont, while other species also contain a green alga photobiont (''Coccomyxa'') and the cyanobacteria is restricted to warty cephalodia on the upper or lower surface of the lichen. Description Species of ''Nephroma'' have a stratified foliose thallus with a cortex that is we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 1757 to Johan Eric Acharius and Catharina Margaretha Hagtorn in Gävle.Sernander., K. “Erik Acharius - Svenskt Biografiskt Lexikon.” Fredrik Teodor Borg - Svenskt Biografiskt Lexikon, sok.riksarkivet.se/sbl/Presentation.aspx?id=5503. He received a private education until he was admitted to Gävle Gymnasium in 1770. Later he matriculated at Uppsala University in 1773 where he studied natural history and medicine under Linnaeus and was the last student to defend a dissertation before him.Thell, A., Kärnefelt, I., Seaward, M., & Westberg, M. (Eds.) (2013). In the footsteps of Erik Acharius. 20th biennial meeting of the Nordic Lichen Society. Vadstena 11–15 August 2013. Programme and Abstracts. Nordic Lichen Society. Acharius's dissert ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cephalodia
{{Short description, Morphological structure found in some lichens Cephalodia (singular cephalodium) are small gall-like structures found in some species of lichens that contain cyanobacterial symbionts Symbiosis (from Greek , , "living together", from , , "together", and , bíōsis, "living") is any type of a close and long-term biological interaction between two different biological organisms, be it mutualistic, commensalistic, or parasit .... Cephalodia can occur within the tissues of the lichen, or on its upper or lower surface. Lichens that have both green algal and cyanobacterial symbionts restrict the cyanobacteria to cephalodia. Lichens that have only cyanobacterial symbionts do not have cephalodia: instead the cyanobacteria are widely distributed throughout the lichen. Lichens with cephalodia can fix nitrogen, and can be an important contributor of nitrogen to the ecosystem. References *Brodo, I. M., S. D. Sharnoff, and S. Sharnoff. 2001. Lichens of North Ame ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nephroma Expallidum
''Nephroma'' is a genus of medium to large foliose lichens. The genus has a widespread distribution. They are sometimes called kidney lichens, named after the characteristic kidney-shaped apothecia that they produce on the lower surface of their lobe tips, which often curl upwards and thus are visible from above. Sterile specimens that do not have apothecia can look somewhat like '' Melanelia'', ''Peltigera'', '' Platismatia'', or '' Asahinea''. Most species grow either on mossy ground or rocks, or on trees. All species of ''Nephroma'' contain cyanobacteria (in the genus ''Nostoc'') as a photobiont, which allows the organism to fix nitrogen. In some species the cyanobacteria is the sole photobiont, while other species also contain a green alga photobiont ('' Coccomyxa'') and the cyanobacteria is restricted to warty cephalodia on the upper or lower surface of the lichen. Description Species of ''Nephroma'' have a stratified foliose thallus with a cortex that is well-develope ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nephroma Cellulosum
''Nephroma'' is a genus of medium to large foliose lichens. The genus has a widespread distribution. They are sometimes called kidney lichens, named after the characteristic kidney-shaped apothecia that they produce on the lower surface of their lobe tips, which often curl upwards and thus are visible from above. Sterile specimens that do not have apothecia can look somewhat like ''Melanelia'', ''Peltigera'', '' Platismatia'', or '' Asahinea''. Most species grow either on mossy ground or rocks, or on trees. All species of ''Nephroma'' contain cyanobacteria (in the genus ''Nostoc'') as a photobiont, which allows the organism to fix nitrogen. In some species the cyanobacteria is the sole photobiont, while other species also contain a green alga photobiont (''Coccomyxa'') and the cyanobacteria is restricted to warty cephalodia on the upper or lower surface of the lichen. Description Species of ''Nephroma'' have a stratified foliose thallus with a cortex that is well-developed on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nephroma Bellum
''Nephroma'' is a genus of medium to large foliose lichens. The genus has a widespread distribution. They are sometimes called kidney lichens, named after the characteristic kidney-shaped apothecia that they produce on the lower surface of their lobe tips, which often curl upwards and thus are visible from above. Sterile specimens that do not have apothecia can look somewhat like ''Melanelia'', ''Peltigera'', '' Platismatia'', or '' Asahinea''. Most species grow either on mossy ground or rocks, or on trees. All species of ''Nephroma'' contain cyanobacteria (in the genus ''Nostoc'') as a photobiont, which allows the organism to fix nitrogen. In some species the cyanobacteria is the sole photobiont, while other species also contain a green alga photobiont (''Coccomyxa'') and the cyanobacteria is restricted to warty cephalodia on the upper or lower surface of the lichen. Description Species of ''Nephroma'' have a stratified foliose thallus with a cortex that is well-developed on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nephroma Australe
''Nephroma'' is a genus of medium to large foliose lichens. The genus has a widespread distribution. They are sometimes called kidney lichens, named after the characteristic kidney-shaped apothecia that they produce on the lower surface of their lobe tips, which often curl upwards and thus are visible from above. Sterile specimens that do not have apothecia can look somewhat like ''Melanelia'', ''Peltigera'', '' Platismatia'', or '' Asahinea''. Most species grow either on mossy ground or rocks, or on trees. All species of ''Nephroma'' contain cyanobacteria (in the genus ''Nostoc'') as a photobiont, which allows the organism to fix nitrogen. In some species the cyanobacteria is the sole photobiont, while other species also contain a green alga photobiont (''Coccomyxa'') and the cyanobacteria is restricted to warty cephalodia on the upper or lower surface of the lichen. Description Species of ''Nephroma'' have a stratified foliose thallus with a cortex that is well-developed on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nephroma2
''Nephroma'' is a genus of medium to large foliose lichens. The genus has a widespread distribution. They are sometimes called kidney lichens, named after the characteristic kidney-shaped apothecia that they produce on the lower surface of their lobe tips, which often curl upwards and thus are visible from above. Sterile specimens that do not have apothecia can look somewhat like ''Melanelia'', ''Peltigera'', '' Platismatia'', or '' Asahinea''. Most species grow either on mossy ground or rocks, or on trees. All species of ''Nephroma'' contain cyanobacteria (in the genus ''Nostoc'') as a photobiont, which allows the organism to fix nitrogen. In some species the cyanobacteria is the sole photobiont, while other species also contain a green alga photobiont (''Coccomyxa'') and the cyanobacteria is restricted to warty cephalodia on the upper or lower surface of the lichen. Description Species of ''Nephroma'' have a stratified foliose thallus with a cortex that is well-developed on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isidia
An isidium is a vegetative reproductive structure present in some lichens. Isidia are outgrowths of the thallus surface, and are corticated (i.e., containing the outermost layer of the thallus), usually with a columnar structure, and consisting of both fungal hyphae (the mycobiont) and algal cells (the photobiont). They are fragile structures and may break off and be distributed by wind, animals, and splashing raindrops. In terms of structure, isidia may be described as warty, cylindrical, clavate (club-shaped), scale-like, coralloid (coral-shaped), simple, or branched. Examples of isidiate lichens include members of the genera ''Parmotrema'' and ''Peltigera''. See also Soredium Soredia are common reproductive structures of lichens. Lichens reproduce asexually by employing simple fragmentation and production of soredia and isidia. Soredia are powdery propagules composed of fungal hyphae wrapped around cyanobacteria o ... References External linksAscomycetes glossary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soredia
Soredia are common reproductive structures of lichens. Lichens reproduce asexually by employing simple fragmentation and production of soredia and isidia. Soredia are powdery propagules composed of fungal hyphae wrapped around cyanobacteria or green algae. These can be either scattered diffusely across the surface of the lichen's thallus Thallus (plural: thalli), from Latinized Greek (), meaning "a green shoot" or "twig", is the vegetative tissue of some organisms in diverse groups such as algae, fungi, some liverworts, lichens, and the Myxogastria. Many of these organisms wer ..., or produced in localized structures called soralia. Fungal hyphae make up the basic body structure of lichen. The soredia are released through openings in the upper cortex of the lichen structure. After their release, the soredia disperse to establish the lichen in a new location. References Fungal morphology and anatomy Lichenology {{lichen-stub ... [...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] |
Iodine
Iodine is a chemical element with the symbol I and atomic number 53. The heaviest of the stable halogens, it exists as a semi-lustrous, non-metallic solid at standard conditions that melts to form a deep violet liquid at , and boils to a violet gas at . The element was discovered by the French chemist Bernard Courtois in 1811 and was named two years later by Joseph Louis Gay-Lussac, after the Ancient Greek 'violet-coloured'. Iodine occurs in many oxidation states, including iodide (I−), iodate (), and the various periodate anions. It is the least abundant of the stable halogens, being the sixty-first most abundant element. As the heaviest essential mineral nutrient, iodine is required for the synthesis of thyroid hormones. Iodine deficiency affects about two billion people and is the leading preventable cause of intellectual disabilities. The dominant producers of iodine today are Chile and Japan. Due to its high atomic number and ease of attachment to organic compound ... [...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] |
