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Taphrina Betulina
''Taphrina betulina'' is a fungal plant pathogen that causes the gall, witches broom, which is a chemical infection of birch buds or the developing shoots, leading to a proliferation of growth. It was first described by Emil Rostrup in 1883 and is found in Europe, New Zealand and North America. Description Witches broom on birch trees (''Betula'' species), are dense bunches of stunted twigs which look like birds nests. The gall starts as densely packed clusters of buds which can remain for many years. Possibly, when the fungus loses vigour, the buds grow into many slender shoots. In the spring, asci form on small leaves which grow on the shoots. These leaves usually fall before the normal leaves grow elsewhere on the tree. There can be several witches broom in a tree. Witches broom, formed by ''Taphrina betulina'' can be found on dwarf birch (''Betula nana''), '' Betula nana x pubescens'', silver birch (''Betula pendula''), downy birch (''Betula pubescens'') and ''Betula pube ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emil Rostrup
Frederik Georg Emil Rostrup (28 January 1831 – 16 January 1907) was a Danish botanist, mycologist and plant pathologist. Biography Emil Rostrup was born at the village of Stokkemarke on the Danish island of Lolland. Rostrup completed his polyteknisk examen in 1857. From 1858, Rostrup was a teacher at the paedagogical college ''Skårup Seminarium'' in then new subject natural history. He educated to-be school teachers for 25 years. In the meantime he had become well known for his flora handbooks and his works on plant pathology. He was appointed docent at the Royal Veterinary and Agricultural University in 1883. From 1902, he was professor at the same college. Rostrup was first real plant pathologist in Denmark and probably the greatest ever. He was member of Royal Danish Academy of Sciences and Letters (from 1882), Royal Physiographic Society in Lund (from 1888), Royal Swedish Academy of Agriculture and Forestry (from 1890). In 1894, he was made honorary doctor at the Universi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Betula Pubescens Var
A birch is a thin-leaved deciduous hardwood tree of the genus ''Betula'' (), in the family Betulaceae, which also includes alders, hazels, and hornbeams. It is closely related to the beech-oak family Fagaceae. The genus ''Betula'' contains 30 to 60 known taxa of which 11 are on the IUCN 2011 Red List of Threatened Species. They are a typically rather short-lived pioneer species widespread in the Northern Hemisphere, particularly in northern areas of temperate climates and in boreal climates. Description Birch species are generally small to medium-sized trees or shrubs, mostly of northern temperate and boreal climates. The simple leaves are alternate, singly or doubly serrate, feather-veined, petiolate and stipulate. They often appear in pairs, but these pairs are really borne on spur-like, two-leaved, lateral branchlets. The fruit is a small samara, although the wings may be obscure in some species. They differ from the alders (''Alnus'', another genus in the family) in that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fungi Of New Zealand
A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a 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 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 group of related organisms, named the ''Eumycota'' (''true fun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fungi Of Europe
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] |
Fungi Described In 1883
A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a 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 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 group of related organisms, named the ''Eumycota'' (''true fun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taphrinomycetes
The Taphrinomycetes are a class of ascomycete fungi belonging to the subdivision Taphrinomycotina. It includes the single order Taphrinales, which includes 2 families, 8 genera and 140 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s .... References Fungus classes Taxa described in 1997 {{Ascomycetes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taphrina Betulina 61912130
''Taphrina'' is a fungal genus within the Ascomycota that causes leaf and catkin curl diseases and witch's brooms of certain flowering plants. One of the more commonly observed species causes peach leaf curl. ''Taphrina'' typically grow as yeasts during one phase of their life cycles, then infect plant tissues in which typical hyphae are formed, and ultimately they form a naked layer of asci on the deformed, often brightly pigmented surfaces of their hosts. No discrete fruit body is formed outside of the gall-like or blister-like tissues of the hosts. The asci form a layer lacking paraphyses, and they lack croziers. The ascospores frequently bud into multiple yeast cells within the asci. Phylogenetically, ''Taphrina'' is a member of a basal group within the Ascomycota, and type genus for the subphylum Taphrinomycotina, the class Taphrinomycetes, and order Taphrinales. Species * ''Taphrina alni'' (Berk. & Broome) Gjaerum * ''Taphrina aurea'' (Pers.) Fr. * ''Taphrina betulina'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taphrina Wiesneri
''Taphrina wiesneri'' is a plant pathogen causing witch's broom, or plant gall formations, on cherry trees (''Prunus'' & '' Cerasus'' spp). It is an important pest species of the ornamental cherry '' Cerasus'' X ''yedoensis'' in Japan.Komatsu, M., Taniguchi, M., Matsushita, N., Takahashi, Y., & Hogetsu, T., (2010) Overwintering of ''Taphrina wiesneri'' within cherry shoots monitored with species-specific PCR. J Gen Plant Pathol Vol. 76, pp. 363–369 Life cycle Komatsu et al. found that hyphae of ''T. wiesneri'' overwintered in symptomatic shoots of '' Cerasus'' × ''yedoensis''. This is in contrast with the overwintering of other ''Taphrina'' species such as ''Taphrina deformans ''Taphrina deformans'' is a fungus and plant pathogen, and a causal agent of peach leaf curl. Peach trees infected with ''T. deformans'' will experience leaf puckering and distortion, acquiring a characteristic downward and inward curl. Leaves w ...'' that over winter on leaf and twig surfaces befor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taphrina Carpini
''Taphrina'' is a fungal genus within the Ascomycota that causes leaf and catkin curl diseases and witch's brooms of certain flowering plants. One of the more commonly observed species causes peach leaf curl. ''Taphrina'' typically grow as yeasts during one phase of their life cycles, then infect plant tissues in which typical hyphae are formed, and ultimately they form a naked layer of asci on the deformed, often brightly pigmented surfaces of their hosts. No discrete fruit body is formed outside of the gall-like or blister-like tissues of the hosts. The asci form a layer lacking paraphyses, and they lack croziers. The ascospores frequently bud into multiple yeast cells within the asci. Phylogenetically, ''Taphrina'' is a member of a basal group within the Ascomycota, and type genus for the subphylum Taphrinomycotina, the class Taphrinomycetes, and order Taphrinales. Species * ''Taphrina alni'' (Berk. & Broome) Gjaerum * ''Taphrina aurea'' (Pers.) Fr. * ''Taphrina betulina'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prunus
''Prunus'' is a genus of trees and shrubs, which includes (among many others) the fruits plums, cherries, peaches, nectarines, apricots, and almonds. Native to the North American temperate regions, the neotropics of South America, and the paleotropics of Asia and Africa, 430 different species are classified under ''Prunus''. Many members of the genus are widely cultivated for their fruit and for decorative purposes. ''Prunus'' fruit are drupes, or stone fruits. The fleshy mesocarp surrounding the endocarp is edible while the endocarp itself forms a hard, inedible shell called the pyrena ("stone" or "pit"). This shell encloses the seed (or "kernel") which is edible in many species (such as almonds) but poisonous in others (such as apricots). Besides being eaten off the hand, most ''Prunus'' fruit are also commonly used in processing, such as jam production, canning, drying, and seeds for roasting. Botany Members of the genus can be deciduous or evergreen. A few species ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hornbeam
Hornbeams are hardwood trees in the flowering plant genus ''Carpinus'' in the birch family Betulaceae. The 30–40 species occur across much of the temperate regions of the Northern Hemisphere. Origin of names The common English name ''hornbeam'' derives from the hardness of the woods (likened to horn) and the Old English ''beam'' "tree" (cognate with Dutch ‘’Boom’’ and German ''Baum''). The American hornbeam is also occasionally known as blue-beech, ironwood, or musclewood, the first from the resemblance of the bark to that of the American beech ''Fagus grandifolia'', the other two from the hardness of the wood and the muscled appearance of the trunk and limbs. The botanical name for the genus, ''Carpinus'', is the original Latin name for the European species, although some etymologists derive it from the Celtic for a yoke. Taxonomy Formerly some taxonomists segregated them with the genera ''Corylus'' ( hazels) and ''Ostrya'' (hop-hornbeams) in a separate family, Coryl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phytoplasma
Phytoplasmas are obligate intracellular parasites of plant phloem tissue and of the insect vectors that are involved in their plant-to-plant transmission. Phytoplasmas were discovered in 1967 by Japanese scientists who termed them mycoplasma-like organisms. Since their discovery, phytoplasmas have resisted all attempts at ''in vitro'' culture in any cell-free medium; routine cultivation in an artificial medium thus remains a major challenge. Phytoplasmas are characterized by the lack of a cell wall, a pleiomorphic or filamentous shape, a diameter normally less than 1 μm, and a very small genome. Phytoplasmas are pathogens of agriculturally important plants, including coconut, sugarcane, and sandalwood, in which they cause a wide variety of symptoms ranging from mild yellowing to death. Phytoplasmas are most prevalent in tropical and subtropical regions. They are transmitted from plant to plant by vectors (normally sap-sucking insects such as leafhoppers) in which they both sur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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