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Gremmeniella Laricina
''Gremmeniella'' is a genus of fungi in the family Helotiaceae. The genus contains at least 3 species. The genus name of ''Gremmeniella'' is in honour of J. Gremmen (fl. 1953) a Dutch botaniker (Mycology), plant pathologist, from the Forest Research Station T.N.O. in Wageningen. The genus was circumscribed by Michel Morele in Bull. Soc. Sci. Nat. Archéol. Toulon & Var vol.183 on page 9 in 1969. ''Gremmeniella abietina'' is a plant pathogen that causes scleroderris canker. Species *''Gremmeniella abietina Scleroderris canker (American name), or Brunchorstia disease (European name), ''Gremmeniella abietina'', is a species of fungal diseases infecting coniferous forests. The main symptom is the death of the needles, leading to the death of the tree ...'' *''Gremmeniella juniperina'' *''Gremmeniella laricina'' *''Gremmeniella pinicola'' *''Gremmeniella baggina'' References Helotiaceae {{Leotiomycetes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canker
A plant canker is a small area of dead tissue, which grows slowly, often over years. Some cankers are of only minor consequence, but others are ultimately lethal and therefore can have major economic implications for agriculture and horticulture. Their causes include a wide range of organisms as fungi, bacteria, mycoplasmas and viruses. The majority of canker-causing organisms are bound to a unique host species or genus, but a few will attack other plants. Weather and animals can spread canker, thereby endangering areas that have only slight amount of canker. Although fungicides or bactericides can treat some cankers, often the only available treatment is to destroy the infected plant to contain the disease. Examples * Apple canker, caused by the fungus ''Neonectria galligena'' * Ash bacterial canker, now understood to be caused by the bacterium '' Pseudomonas savastanoi'', rather than ''Pseudomonas syringae''. After DNA-relatedness studies ''Pseudomonas savastanoi'' has bee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fungi
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'' (''t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ascomycota
Ascomycota is a phylum of the kingdom Fungi that, together with the Basidiomycota, forms the subkingdom Dikarya. Its members are commonly known as the sac fungi or ascomycetes. It is the largest phylum of Fungi, with over 64,000 species. The defining feature of this fungal group is the " ascus" (), a microscopic sexual structure in which nonmotile spores, called ascospores, are formed. However, some species of the Ascomycota are asexual, meaning that they do not have a sexual cycle and thus do not form asci or ascospores. Familiar examples of sac fungi include morels, truffles, brewers' and bakers' yeast, dead man's fingers, and cup fungi. The fungal symbionts in the majority of lichens (loosely termed "ascolichens") such as ''Cladonia'' belong to the Ascomycota. Ascomycota is a monophyletic group (it contains all descendants of one common ancestor). Previously placed in the Deuteromycota along with asexual species from other fungal taxa, asexual (or anamorphic) ascomyce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leotiomycetes
The Leotiomycetes are a class of ascomycete fungi. Many of them cause serious plant diseases. Systematics The class Leotiomycetes contains numerous species with an anamorph placed within the ''fungi imperfecti'' (deuteromycota), that have only recently found their place in the phylogenetic system. The older classifications placed Leotiomycetes into the Discomycetes clade ( inoperculate Discomycetes). Molecular studies have recently shed some new light to the still obscure systematics. Most scholars consider Leotiomycetes a sister taxon to Sordariomycetes in the phylogenetic tree of Pezizomycotina. Its division into subclasses have received strong support by the molecular data, but the overall monophyly of Leotiomycetes is dubious. The order Lichinodiales and family Lichinodiaceae, newly circumscribed in 2019 to contain the genus cyanolichen genus '' Lichinodium'', is the first known group of lichen-forming fungi in the Leotiomycetes. Characteristics *Most ''Leotiomycetes'' g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helotiales
Helotiales is an order of the class Leotiomycetes within the division Ascomycota. The taxonomy within Helotiales has been debated. It has expanded significantly as genomic techniques for taxonomical identification have become more commonly used. , the order is estimated to contain 30 accepted families, 519 genera, and 6266 species. Helotiales is the largest order of non-stromatic discomycetes that usually, but not always, have brightly coloured apothecia. Many members of the family have obviously cup-shaped ascomata with little or no stipes. They are usually found fruiting on coarse or large wood debris as well as on other organic matter. Part of these discomycetes are limited to a specific host range, this goes as far as to not just being limited to one particular plant, additionally some species need a particular part of that plant. Description *Helotiales is distinguished by its disc or cup-shaped apothecia. *Its asci are only slightly thickened in contrast to other Leot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helotiaceae
The Helotiaceae are a family of fungi in the order Helotiales. The distribution of species in the family are widespread, and typically found in tropical areas. There are 117 genera and 826 species in the family. A question mark after the genus name means that according to the 2007 Outline of Ascomycota, the placement of that genus in this family is uncertain. A '' Allophylaria'' — ''Ameghiniella'' — '' Aquadiscula'' — '' Ascocalyx'' — '' Ascoclavulina'' — ''Ascocoryne'' — '' Ascotremella'' — ''Austrocenangium'' B ''Banksiamyces?'' — '' Belonioscyphella'' — '' Bioscypha'' — ''Bisporella'' — ''Bryoscyphus'' — ''Bulgariella'' — ''Bulgariopsis'' C ''Calloriopsis?'' — ''Calycellinopsis'' — ''Capillipes'' — ''Carneopezizella'' — ''Cenangiopsis'' — ''Cenangium'' — ''Cenangiumella'' — '' Chloroscypha'' — '' Claussenomyces'' — ''Cordierites'' — '' Crocicreas'' — ''Crumenella'' — '' Crumenulopsis'' — ''Cudoniella'' D '' Denc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gremmeniella Abietina
Scleroderris canker (American name), or Brunchorstia disease (European name), ''Gremmeniella abietina'', is a species of fungal diseases infecting coniferous forests. The main symptom is the death of the needles, leading to the death of the tree. In the forest industry, fighting off an infection of Scleroderris canker is usually not cost-effective. Clearing is often preferred over fungicidal methods, as the latter is harmful to other living organisms. Geographical distribution The European strain is present throughout all of Europe, including the European part of Russia. The American strain limits itself to north of 44° N. Cause and symptoms There are two strains of the fungus in existence, the North American and European. The latter is more virulent, capable of infecting an entire tree and killing it over a few years time, whereas the North American strain limits itself to the first few metres of the stem. Another reason behind the high potency of the European strain is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gremmeniella Laricina
''Gremmeniella'' is a genus of fungi in the family Helotiaceae. The genus contains at least 3 species. The genus name of ''Gremmeniella'' is in honour of J. Gremmen (fl. 1953) a Dutch botaniker (Mycology), plant pathologist, from the Forest Research Station T.N.O. in Wageningen. The genus was circumscribed by Michel Morele in Bull. Soc. Sci. Nat. Archéol. Toulon & Var vol.183 on page 9 in 1969. ''Gremmeniella abietina'' is a plant pathogen that causes scleroderris canker. Species *''Gremmeniella abietina Scleroderris canker (American name), or Brunchorstia disease (European name), ''Gremmeniella abietina'', is a species of fungal diseases infecting coniferous forests. The main symptom is the death of the needles, leading to the death of the tree ...'' *''Gremmeniella juniperina'' *''Gremmeniella laricina'' *''Gremmeniella pinicola'' *''Gremmeniella baggina'' References Helotiaceae {{Leotiomycetes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fungi
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'' (''t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plant Pathologist
Plant pathology (also phytopathology) is the scientific study of diseases in plants caused by pathogens (infectious organisms) and environmental conditions (physiological factors). Organisms that cause infectious disease include fungus, fungi, oomycetes, bacterium, bacteria, plant virus, viruses, viroids, virus-like organisms, phytoplasmas, protozoa, nematodes and parasitic plants. Not included are ectoparasites like insects, mites, vertebrate, or other Plant defense against herbivory, pests that affect plant health by eating Plant tissue, plant tissues. Plant pathology also involves the study of pathogen identification, disease etiology, disease cycles, economic impact, plant disease epidemiology, plant disease resistance, how plant diseases affect humans and animals, pathosystem genetics, and management of plant diseases. Overview Control of plant diseases is crucial to the reliable production of food, and it provides significant problems in agricultural use of land, wat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wageningen
Wageningen () is a municipality and a historic city in the central Netherlands, in the province of Gelderland. It is famous for Wageningen University, which specialises in life sciences. The municipality had a population of in , of which many thousands are students from over 150 countries. Demograpics Inhabitants by nationality 71,68% is Dutch, 28,32% has a migration background. Geography Wageningen is situated on the north bank of the Nederrijn (the Dutch portion of the Lower Rhine) part of the Gelderse valley (Dutch: Gelderse Vallei) and the Veluwe, of which the southwest hill is called the ''Wageningse Berg''. Wageningen can be reached by car from highways A12 via the N781, A15 via the N233 and N225, and A50 via the N225, and from the Ede-Wageningen railway station via a 20-minute bus drive to the Wageningen central terminal (see below)., ''Topographic map of the municipality of Wageningen, July 2013 (click to enlarge)'' History The oldest known settlements in the Wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
