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Amanita Cokeri
''Amanita cokeri'', commonly known as Coker's amanita and solitary lepidella, is a mushroom in the family Amanitaceae. The mushroom is poisonous. First described as ''Lepidella cokeri'' in 1928, it was transferred to the genus ''Amanita'' in 1940. Taxonomy ''Amanita cokeri'' was first described as ''Lepidella cokeri'' by mycologists E.-J.Gilbert and Robert Kühner in 1928. It was in 1940 when the species was transferred from genus ''Lepidella'' to ''Amanita'' by Gilbert. Presently, ''A. cokeri'' is placed under genus ''Amanita'' and section ''Roanokenses''. The epithet ''cokeri'' is in honour of American mycologist and botanist William Chambers Coker. Description Its cap is white in colour, and across. It is oval to convex in shape. The surface is dry but sticky when wet. The cap surface is characterized by large pointed warts, white to brown in colour. Gills are closely spaced and free from the stem. They are cream at first, but can turn white as the mushroom matures. Sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Kühner
Robert Kühner (15 March 1903 in Paris – 27 February 1996 in Lyon) was a French mycologist most notable for reviewing many forms of agaric (mushroom fungus) genera. He studied at the Sorbonne, afterwards from 1921 until 1932, he was working as a high school teacher in Lille. Then from 1938 till 1973, he was associated with the Faculty of Sciences at Lyon. He was honoured in 1946, with ''Kuehneromyces'', which is a genus of fungi in the family Strophariaceae. Selected works * ''Contribution à l'étude des hyménomycètes et spécialement des agaricacés'', 1926 - Contribution to the study of Hymenomycetes and especially of Agaricales. * ''Le genre Galera (Fries) Quélet'', 1935 - The genus Galera (Fries) Quélet. * ''Le genre Mycena (Fries) Étude cytologique et systématique des espèces d'Europe et d'Amérique du Nord'', 1938 - The genus Mycena (Fries), cytological and systematic studies of species native to Europe and North America. * ''Flore analytique des champigno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amanita Solitaria
''Amanita echinocephala'' is a large, whitish or ivory-coloured mushroom with a characteristic spiny, or warty-looking cap. It lives on chalky soils with beech trees, and appears earlier than most mushrooms of similar size in southern England. It frequently occurs singly or in small groups, resulting in it being referred to as the solitary amanita or, more specifically, European solitary lepidella. It is very drought-tolerant. ''Amanita solitaria'' is a synonym and opinions are divided as to which name takes precedence. Taxonomy It was first described as ''Agaricus echinocephalus'' in 1835 by the Italian mycologist Carlo Vittadini, before being placed in ''Amanita'' by Lucien Quélet and hence receiving its current binomial name. It derives its specific epithet ''echinocephala'' from the Greek ''echino-'' "hedgehog" and ''kephale'' "head". It has been placed in the ''Lepidella'' section of the Amanitaceae by some authors, because of its lack of a well formed volva. ''Amani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poisonous Fungi
This is a compendium of poisonous fungi. See also mushroom poisoning. List of toxic mushroom species ''There are poisonous fungus species listed below.'' List of suspicious mushroom species See also *List of deadly fungi *List of poisonous animals *List of poisonous plants *Mushroom poisoning * Mycotoxicology *Mycotoxin A mycotoxin (from the Greek μύκης , "fungus" and τοξίνη , "toxin") is a toxic secondary metabolite produced by organisms of kingdom Fungi and is capable of causing disease and death in both humans and other animals. The term 'mycotoxin' ... References External links *{{commons category-inline poisonous fungi, List of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Amanita Species
The following is a list of some notable species of the agaric genus ''Amanita''. This genus contains over 500 named species and varieties, but the list is far from exhaustive. The list follows the classification of subgenera and sections of ''Amanita'' outline by Corner and Bas; Bas, as used by Tulloss (2007) and modified by Redhead & al. (2016) for ''Amanita'' subgenus ''Amanitina'' and Singer for ''Amanita'' section ''Roanokenses''. Bolding of the species name and an asterisk (*) following indicates the species is the type species of that section, with a double asterisk (**) indicating the type species of the entire genus. The use of common names follows Tulloss (2007), Holden (2003), Arora (1986), and Lincoff (1981). Subgenus ''Amanita'' Section ''Amanita'' * ''Amanita albocreata'' – (North America) * ''Amanita aliena'' – (south Brazil) * ''Amanita altipes'' – (southwestern China) * ''Amanita aprica'' – (North America) * ''Amanita armeniaca'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isoleucine
Isoleucine (symbol Ile or I) is an α-amino acid that is used in the biosynthesis of proteins. It contains an α-amino group (which is in the protonated −NH form under biological conditions), an α-carboxylic acid group (which is in the deprotonated −COO form under biological conditions), and a hydrocarbon side chain with a branch (a central carbon atom bound to three other carbon atoms). It is classified as a non-polar, uncharged (at physiological pH), branched-chain, aliphatic amino acid. It is essential in humans, meaning the body cannot synthesize it, and must be ingested in our diet. Isoleucine is synthesized from pyruvate employing leucine biosynthesis enzymes in other organisms such as bacteria. It is encoded by the codons AUU, AUC, and AUA. Metabolism Biosynthesis As an essential nutrient, it is not synthesized in the body, hence it must be ingested, usually as a component of proteins. In plants and microorganisms, it is synthesized via several steps, startin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xanthomonas Campestris
''Xanthomonas campestris'' is a bacterium that causes a variety of plant diseases, including "black rot" in cruciferous vegetables and bacterial wilt of turfgrass. It is also used in the commercial production of xanthan gum, a high-molecular-weight polysaccharide which has many important uses, especially in the food industry. Pathovars (pv. means pathovar, a type of classification based on the host plant that is attacked by ''Xanthomonas campestris'') * ''Xanthomonas campestris'' pv. ''armoraciae'' * ''Xanthomonas campestris'' pv. ''begoniae'' A * ''Xanthomonas campestris'' pv. ''begoniae'' B * ''Xanthomonas campestris'' pv. ''campestris'' * ''Xanthomonas campestris'' pv. ''cannabis'' * ''Xanthomonas campestris'' pv. ''carota'' * ''Xanthomonas campestris'' pv. ''corylina'' * ''Xanthomonas campestris'' pv. ''dieffenbachiae'' * ''Xanthomonas campestris'' pv. ''glycines'' syn. ''Xanthomonas axonopodis'' pv. ''glycines'' * ''Xanthomonas campestris'' pv. ''graminis'' * ''Xanthomon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erwinia Amylovora
Fire blight, also written fireblight, is a contagious disease affecting apples, pears, and some other members of the family Rosaceae. It is a serious concern to apple and pear producers. Under optimal conditions, it can destroy an entire orchard in a single growing season. The causal pathogen is ''Erwinia amylovora'', a Gram-negative bacterium in the genus ''Erwinia'', order Enterobacterales. It is a short rod with rounded ends and many peritrichous flagellae. Pears are the most susceptible, but apples, loquat, crabapples, quinces, Crataegus, hawthorn, cotoneaster, ''Pyracantha'', raspberry and some other rosaceous plants are also vulnerable. The disease is believed to be indigenous to North America, from where it spread to most of the rest of the world. Fire blight is not believed to be present in Australia though it might possibly exist there. It has been a major reason for a long-standing embargo on the importation of New Zealand apples to Australia. Japan was likewise believe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agrobacterium Tumefaciens
''Agrobacterium radiobacter'' (more commonly known as ''Agrobacterium tumefaciens'') is the causal agent of crown gall disease (the formation of tumours) in over 140 species of eudicots. It is a rod-shaped, Gram-negative soil bacterium. Symptoms are caused by the insertion of a small segment of DNA (known as the T-DNA, for 'transfer DNA', not to be confused with tRNA that transfers amino acids during protein synthesis), from a plasmid into the plant cell, which is incorporated at a semi-random location into the plant genome. Plant genomes can be engineered by use of ''Agrobacterium'' for the delivery of sequences hosted in T-DNA binary vectors. ''Agrobacterium tumefaciens'' is an Alphaproteobacterium of the family Rhizobiaceae, which includes the nitrogen-fixing legume symbionts. Unlike the nitrogen-fixing symbionts, tumor-producing ''Agrobacterium'' species are pathogenic and do not benefit the plant. The wide variety of plants affected by ''Agrobacterium'' makes it of gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oncopeltus Fasciatus
''Oncopeltus fasciatus'', known as the large milkweed bug, is a medium-sized hemipteran (true bug) of the family Lygaeidae.Attisano, A. (2013) Oosorption and migratory strategy of the milkweed bug,''Oncopeltus fasciatus. Animal Behaviour 86(3):651-657.'' It is distributed throughout North America, from Central America through Mexico and the Caribbean to southern areas in Canada. Costa Rica represents this insect's southern limit. It inhabits disturbed areas, roadsides, and open pastures. Due to this widespread geographic distribution, this insect exhibits varying life history trade-offs depending on the population location, including differences in wing length and other traits based on location. Identification Adults can range from 11 to 12 mm in length and have a red/orange and black X-shaped pattern on their wings underneath the triangle that is typical to hemipterans. This feature makes the bug easily seen, acting as an aposematic warning to predators of distastefu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cercospora Kikuchii
''Cercospora kikuchii'' is a fungal plant pathogen that affects soybean The soybean, soy bean, or soya bean (''Glycine max'') is a species of legume native to East Asia, widely grown for its edible bean, which has numerous uses. Traditional unfermented food uses of soybeans include soy milk, from which tofu a ...s. It results in both the Cercospora leaf blight and purple seed stain diseases on soybean and is found almost worldwide. ''C. kikuchii'' produces the toxin cercosporin, as do a number of other ''Cercospora'' species. Symptoms Seed: The disease on the host soybean itself can be determined by a light activated red perlene quinon, cercosporin, with a molecular weight of 534. Purple seed stain by Cercospora can be determined by a variety of factors. First, infected seeds have spots that are usually pink or purple. The size can be from minuscule to covering the whole seed (Li 2019). The coloration will be from the hilum area. Germination and seedling size may be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amino Acid
Amino acids are organic compounds that contain both amino and carboxylic acid functional groups. Although hundreds of amino acids exist in nature, by far the most important are the alpha-amino acids, which comprise proteins. Only 22 alpha amino acids appear in the genetic code. Amino acids can be classified according to the locations of the core structural functional groups, as Alpha and beta carbon, alpha- , beta- , gamma- or delta- amino acids; other categories relate to Chemical polarity, polarity, ionization, and side chain group type (aliphatic, Open-chain compound, acyclic, aromatic, containing hydroxyl or sulfur, etc.). In the form of proteins, amino acid '' residues'' form the second-largest component (water being the largest) of human muscles and other tissues. Beyond their role as residues in proteins, amino acids participate in a number of processes such as neurotransmitter transport and biosynthesis. It is thought that they played a key role in enabling life ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amanita Timida
The genus ''Amanita'' contains about 600 species of agarics, including some of the most toxic known mushrooms found worldwide, as well as some well-regarded edible species. This genus is responsible for approximately 95% of the fatalities resulting from mushroom poisoning, with the death cap accounting for about 50% on its own. The most potent toxin present in these mushrooms is α-Amanitin. The genus also contains many edible mushrooms, but mycologists discourage mushroom hunters, other than experts, from selecting any of these for human consumption. Nonetheless, in some cultures, the larger local edible species of ''Amanita'' are mainstays of the markets in the local growing season. Samples of this are '' Amanita zambiana'' and other fleshy species in central Africa, '' A. basii'' and similar species in Mexico, '' A. caesarea'' and the "Blusher" '' Amanita rubescens'' in Europe, and '' A. chepangiana'' in South-East Asia. Other species are used for colouring sauces, such as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
