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Chalara Fraxinea
''Hymenoscyphus fraxineus'' () is an ascomycete fungus that causes ash dieback, a chronic fungal disease of ash trees in Europe characterised by leaf loss and crown dieback in infected trees. The fungus was first scientifically described in 2006 under the name ''Chalara fraxinea''. Four years later it was discovered that ''Chalara fraxinea'' is the asexual (anamorphic) stage of a fungus that was subsequently named ''Hymenoscyphus pseudoalbidus'' and then renamed as ''Hymenoscyphus fraxineus''. Trees reported dying in Poland in 1992 are now believed to have been infected with this pathogen. It is now widespread in Europe, with up to 85% mortality rates recorded in plantations and 69% in woodlands. It is closely related to a native fungus ''Hymenoscyphus albidus'', which is harmless to European ash trees. According to a 2016 report published in the Journal of Ecology a combination of ''H. fraxineus'' and emerald ash borer attacks could wipe out European ash trees. Genetics Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hymenoscyphus Albidus
''Hymenoscyphus albidus'' is a saprotrophic fungus which grows on the dead leaves of ash trees. ''Hymenoscyphus albidus'' has been known from Europe since 1851 and is not regarded as pathogenic. It is distinct from, but closely resembles, the pathogenic fungus ''Hymenoscyphus fraxineus ''Hymenoscyphus fraxineus'' () is an ascomycete fungus that causes ash dieback, a chronic fungal disease of ash trees in Europe characterised by leaf loss and crown dieback in infected trees. The fungus was first scientifically described in 200 ...'' (formerly known as ''Hymenoscyphus pseudoalbidus''). Although ''Hymenoscyphus albidus'' is "morphologically virtually identical" to ''Hymenoscyphus fraxineus'', there are substantial genetic differences between the two species. References Helotiaceae Taxa named by John Baptiste Henri Joseph Desmazières {{Leotiomycetes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fungi
A fungus (plural, : fungi or funguses) is any member of the group of Eukaryote, eukaryotic organisms that includes microorganisms such as yeasts and Mold (fungus), molds, as well as the more familiar mushrooms. These organisms are classified as a Kingdom (biology), kingdom, separately from the other eukaryotic kingdoms, which by one traditional classification include Plantae, Animalia, Protozoa, and Chromista. A characteristic that places fungi in a different kingdom from plants, bacteria, and some protists is chitin in their cell walls. Fungi, like animals, are heterotrophs; they acquire their food by absorbing dissolved molecules, typically by secreting digestive enzymes into their environment. Fungi do not photosynthesize. Growth is their means of motility, mobility, except for spores (a few of which are flagellated), which may travel through the air or water. Fungi are the principal decomposers in ecological systems. These and other differences place fungi in a single gro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molecular Genetics
Molecular genetics is a sub-field of biology that addresses how differences in the structures or expression of DNA molecules manifests as variation among organisms. Molecular genetics often applies an "investigative approach" to determine the structure and/or function of genes in an organism's genome using genetic screens. The field of study is based on the merging of several sub-fields in biology: classical Mendelian inheritance, cellular biology, molecular biology, biochemistry, and biotechnology. Researchers search for mutations in a gene or induce mutations in a gene to link a gene sequence to a specific phenotype. Molecular genetics is a powerful methodology for linking mutations to genetic conditions that may aid the search for treatments/cures for various genetics diseases. History For molecular genetics to develop as a discipline, several scientific discoveries were necessary. The discovery of DNA as a means to transfer the genetic code of life from one c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lithuania
Lithuania (; lt, Lietuva ), officially the Republic of Lithuania ( lt, Lietuvos Respublika, links=no ), is a country in the Baltic region of Europe. It is one of three Baltic states and lies on the eastern shore of the Baltic Sea. Lithuania shares land borders with Latvia to the north, Belarus to the east and south, Poland to the south, and Russia to the southwest. It has a maritime border with Sweden to the west on the Baltic Sea. Lithuania covers an area of , with a population of 2.8 million. Its capital and largest city is Vilnius; other major cities are Kaunas and Klaipėda. Lithuanians belong to the ethno-linguistic group of the Balts and speak Lithuanian, one of only a few living Baltic languages. For millennia the southeastern shores of the Baltic Sea were inhabited by various Baltic tribes. In the 1230s, Lithuanian lands were united by Mindaugas, becoming king and founding the Kingdom of Lithuania on 6 July 1253. In the 14th century, the Grand Duchy of Li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Norwich
Norwich () is a cathedral city and district of Norfolk, England, of which it is the county town. Norwich is by the River Wensum, about north-east of London, north of Ipswich and east of Peterborough. As the seat of the Episcopal see, See of Norwich, with one of the country's largest medieval cathedrals, it is the largest settlement and has the largest Norwich built-up area, urban area in East Anglia. The population of the Norwich City Council local authority area was estimated to be 144,000 in 2021, which was an increase from 143,135 in 2019. The wider Norwich Built-up area, built-up area had a population of 213,166 in 2019. Heritage and status Norwich claims to be the most complete medieval city in the United Kingdom. It includes cobbled streets such as Elm Hill, Norwich, Elm Hill, Timber Hill and Tombland; ancient buildings such as St Andrew's and Blackfriars' Hall, Norwich, St Andrew's Hall; half-timbered houses such as Dragon Hall, Norwich, Dragon Hall, Norwich Guildhal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Innes Centre
The John Innes Centre (JIC), located in Norwich, Norfolk, England, is an independent centre for research and training in plant and microbial science founded in 1910. It is a registered charity (No 223852) grant-aided by the Biotechnology and Biological Sciences Research Council (BBSRC), the European Research Council (ERC) and the Bill and Melinda Gates Foundation and is a member of the Norwich Research Park. In 2017, the John Innes Centre was awarded a gold Athena SWAN Charter award for equality in the workplace. History The John Innes Horticultural Institution was founded in 1910 at Merton Park, Surrey (now London Borough of Merton), with funds bequeathed by John Innes, a merchant and philanthropist. The Institution occupied Innes's former estate at Merton Park until 1945 when it moved to Bayfordbury, Hertfordshire. It moved to its present site in 1967. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sainsbury Laboratory
The Sainsbury Laboratory (TSL) is a research institute located at the Norwich Research Park (NRP) in Norwich, Norfolk, England, that carries out fundamental biological research and technology development on aspects of plant disease, plant disease resistance and microbial symbiosis in plants. It was founded in 1987. Research Training TSL provides a training environment with the intention of preparing post-graduate students, post-doctoral scientists and early career project leaders to excel in their careers. This includes training from the expert technology groups in plant tissue culture and transformation, bioinformatics and computational biology, proteomics, and synthetic biology as well as mentoring from established scientists. Facilities TSL provides its researchers access to compute clusters, mass spectrometers, confocal high content screening microscopy and plant growth and transformation facilities. Technology development The four core technology teams of TSL develop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fraxinus Mandschurica
''Fraxinus mandshurica'', the Manchurian ash, is a species of '' Fraxinus'' native to northeastern Asia in northern China ( Gansu, Hebei, Heilongjiang, Henan, Hubei, Jilin, Liaoning, Shaanxi, Shanxi), Korea, Japan and southeastern Russia (Sakhalin Island). It is a medium-sized to large deciduous tree reaching 30 m tall, with a trunk up to 50 cm in diameter. The leaves are 25–40 cm long, pinnate compound, with 7–13 leaflets, the leaflets 5–20 cm long and 2–5 cm broad, subsessile on the leaf rachis, and with a serrated margin. They turn to a golden-yellow in early autumn, and the tree is usually early to change color. The flowers are produced in early spring, before the new leaves, in compact panicles; they are inconspicuous with no petals, and are wind-pollinated. The fruit is a samara comprising a single seed 1–2 cm long with an elongated apical wing 2.5–4 cm long and 5–7 mm broad. It is closely related to ''Fraxinus nigra'' ( ... [...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 "bou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plant Litter
Plant litter (also leaf litter, tree litter, soil litter, litterfall or duff) is dead plant material (such as leaves, bark, needles, twigs, and cladodes) that have fallen to the ground. This detritus or dead organic material and its constituent nutrients are added to the top layer of soil, commonly known as the litter layer or O horizon ("O" for "organic"). Litter is an important factor in ecosystem dynamics, as it is indicative of ecological productivity and may be useful in predicting regional nutrient cycling and soil fertility. Characteristics and variability Litterfall is characterized as fresh, undecomposed, and easily recognizable (by species and type) plant debris. This can be anything from leaves, cones, needles, twigs, bark, seeds/nuts, logs, or reproductive organs (e.g. the stamen of flowering plants). Items larger than 2 cm diameter are referred to as coarse litter, while anything smaller is referred to as fine litter or litter. The type of litterfall i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
