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Magnaporthe Rhizophila
''Magnaporthe rhizophila'' is a fungus species in the family Magnaporthaceae. These dark mycelial fungi are common pathogens of cereal and grass roots. Rice blast is one disease known to be caused by M. rhizophila and presents with vascular discoloration in the host organism. The fungus lives best in drier humid conditions, explaining why it is most often found in the soils of Australia, South Africa, and the Southeastern United States. Development Similar to other ascomycota, the lifecycle of ''M. rhizophila'' is split into two parts: the sexual and asexual stages. The sexual lifestage is characterized by a globose (400-500 um wide) fruit-like body that contains the sexual spores, called a perithecia, which occurs in either singles or multiples. Perithecia are flask-like shaped and contain asci, which are septated, unitunicate stalks of 8 ascospores. The ascospores are biseriate, fusiform, and slightly curved or helical when naive. The perithecia is lined with cells calle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnaporthaceae
The Magnaporthaceae are a family of fungi in the order Magnaporthales. It was circumscribed by Paul F. Cannon in 1994 for a group of grass-associated fungi centered on ''Magnaporthe'' (''Nakataea''). Magnaporthaceae have a harpophora-like asexual morphology and are often associated with roots of grasses or cereals. Important pathogens from the ''Magnaporthaceae'' include '' Nakataea oryzae, Gaeumannomyces graminis'', '' Magnaporthiopsis poae'' and ''Magnaporthe rhizophila''. Taxonomy and systematics Type genus: ''Nakataea'' Hara (= ''Magnaporthe'' R.A. Krause & R.K. Webster) Type species: '' Nakataea oryzae'' (Catt.) J. Luo & N. Zhang Description Magnaporthaceae that reproduce sexually, have perithecial ascomata that are immersed in host tissue, frequently with long necks. Asci are cylindrical and stain positive in Meltzer's reagent. Ascospores are curved to sigmoid and contain septa. They show variability in their morphology and can be filiform (''Gaeumannomyces'') or fus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypha
A hypha (; ) is a long, branching, filamentous structure of a fungus, oomycete, or actinobacterium. In most fungi, hyphae are the main mode of vegetative growth, and are collectively called a mycelium. Structure A hypha consists of one or more cells surrounded by a tubular cell wall. In most fungi, hyphae are divided into cells by internal cross-walls called "septa" (singular septum). Septa are usually perforated by pores large enough for ribosomes, mitochondria, and sometimes nuclei to flow between cells. The major structural polymer in fungal cell walls is typically chitin, in contrast to plants and oomycetes that have cellulosic cell walls. Some fungi have aseptate hyphae, meaning their hyphae are not partitioned by septa. Hyphae have an average diameter of 4–6 µm. Growth Hyphae grow at their tips. During tip growth, cell walls are extended by the external assembly and polymerization of cell wall components, and the internal production of new cell membrane. The S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyricularia
''Pyricularia'' is a genus of fungi which was named by Saccardo in 1880.Saccardo, P.A. Michelia 2(no. 6): 20. 1880 The polyphyletic nature of ''Pyricularia'' has been resolved and species of ''Pyricularia s. str.'' were shown to belong to a monophyletic clade (including ''Pyricularia grisea'' isolates), defining the family Pyriculariaceae. Etymology The genus ''Pyricularia'' is named after the pyriform (pear-shaped) shape of its conidia. Pathogenicity The genus ''Pyricularia'' includes species that are pathogenic on a wide range of monocot plants. For example, ''Pyricularia oryzae'' (sexual morph ''Magnaporthe oryzae''), the causal agent of the rice blast disease, is one of the most widely distributed diseases of rice, and is highly destructive leading to up to 30% yield loss worldwide. ''Pyricularia oryzae'' isolates from rice are mostly host-specific and infect only few host plants beside rice (barley and ''Lolium''). ''Pyricularia oryzae'' isolates from other host plant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sympodial Branching
Sympodial growth is a bifurcating branching pattern where one branch develops more strongly than the other, resulting in the stronger branches forming the primary shoot and the weaker branches appearing laterally. A sympodium, also referred to as a sympode or pseudaxis, is the primary shoot, comprising the stronger branches, formed during sympodial growth. The pattern is similar to dichotomous branching; it is characterized by branching along stems or hyphae. In botany, sympodial growth occurs when the apical meristem is terminated and growth is continued by one or more lateral meristems, which repeat the process. The apical meristem may be consumed to make an inflorescence or other determinate structure, or it may be aborted. Types If the sympodium is always formed on the same side of the branch bifurcation, e.g. always on the right side, the branching structure is called a helicoid cyme or bostryx. If the sympodium occurs alternately, e.g. on the right and then the left, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teleomorph, Anamorph And Holomorph
In mycology, the terms teleomorph, anamorph, and holomorph apply to portions of the life cycles of fungi in the phyla Ascomycota and Basidiomycota: *Teleomorph: the sexual reproductive stage (morph), typically a fruiting body. *Anamorph: an asexual reproductive stage (morph), often mold-like. When a single fungus produces multiple morphologically distinct anamorphs, these are called synanamorphs. *Holomorph: the whole fungus, including anamorphs and teleomorph. Dual naming of fungi Fungi are classified primarily based on the structures associated with sexual reproduction, which tend to be evolutionarily conserved. However, many fungi reproduce only asexually, and cannot easily be classified based on sexual characteristics; some produce both asexual and sexual states. These problematic species are often members of the Ascomycota, but a few of them belong to the Basidiomycota. Even among fungi that reproduce both sexually and asexually, often only one method of reproduction can be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phialophora
''Phialophora'' is a form genus of fungus with short conidiophores, sometimes reduced to phialides; their conidia are unicellular. They may be parasites (including on humans), or saprophytic (including on apples). Genetic analysis of ''Phialophora'' shows that it is a paraphyletic grouping. The conidia are produced from a flask shaped phialide. Mature, spherical, to oval conidia are extruded from phialides and usually accumulate around it. Some members of ''Phialophora'' are involved in symbiotic relationships with leafcutter ants where they grow on the cuticle of the ants and fulfill a saprophytic Saprotrophic nutrition or lysotrophic nutrition is a process of chemoheterotrophic extracellular digestion involved in the processing of decayed (dead or waste) organic matter. It occurs in saprotrophs, and is most often associated with fungi ( ... role that aids in the fungal gardening on which the ants rely. References External links * Eurotiomycetes Eurotiomyce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaeumannomyces
''Gaeumannomyces'' is a genus of fungi in the family Magnaporthaceae. Species *''Gaeumannomyces amomi'' *''Gaeumannomyces caricis'' *''Gaeumannomyces cylindrosporus'' *''Gaeumannomyces graminis'' **'' Gaeumannomyces graminis var. avenae'' **'' Gaeumannomyces graminis var. graminis'' **'' Gaeumannomyces graminis var. maydis'' **'' Gaeumannomyces graminis var. tritici'' *''Gaeumannomyces incrustans'' *''Gaeumannomyces licualae'' *''Gaeumannomyces medullaris'' *''Gaeumannomyces mirabilis'' *''Gaeumannomyces wongoonoo ''Gaeumannomyces'' is a genus of fungi in the family Magnaporthaceae. Species *'' Gaeumannomyces amomi'' *'' Gaeumannomyces caricis'' *'' Gaeumannomyces cylindrosporus'' *''Gaeumannomyces graminis ''Gaeumannomyces graminis'' var. ''graminis ...'' External links Sordariomycetes genera Magnaporthales {{Sordariomycetes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clade
A clade (), also known as a monophyletic group or natural group, is a group of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree. Rather than the English term, the equivalent Latin term ''cladus'' (plural ''cladi'') is often used in taxonomical literature. The common ancestor may be an individual, a population, or a species (extinct or extant). Clades are nested, one in another, as each branch in turn splits into smaller branches. These splits reflect evolutionary history as populations diverged and evolved independently. Clades are termed monophyletic (Greek: "one clan") groups. Over the last few decades, the cladistic approach has revolutionized biological classification and revealed surprising evolutionary relationships among organisms. Increasingly, taxonomists try to avoid naming taxa that are not clades; that is, taxa that are not monophyletic. Some of the relationships between organisms ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pezizomycotina
Pezizomycotina make up most of the Ascomycota fungi and include most lichenized fungi too. Pezizomycotina contains the filamentous ascomycetes and is a subdivision of the Ascomycota (fungi that form their spores in a sac-like ''ascus''). It is more or less synonymous with the older taxon Euascomycota. These fungi reproduce by fission rather than budding and this subdivision includes almost all the ascus fungi that have fruiting bodies visible to the naked eye (exception: genus ''Neolecta'', which belongs to the Taphrinomycotina). See the taxobox for a list of the classes that make up the Pezizomycotina. The old class Loculoascomycetes (consisting of all the bitunicate Ascomycota) has been replaced by the two classes Eurotiomycetes and Dothideomycetes. The rest of the Pezizomycotina also include the previously defined hymenial groups Discomycetes (now Leotiomycetes) and Pyrenomycetes (Sordariomycetes). Some important groups in Pezizomycotina include: Pezizomycetes (the opercula ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phylogenetic Tree
A phylogenetic tree (also phylogeny or evolutionary tree Felsenstein J. (2004). ''Inferring Phylogenies'' Sinauer Associates: Sunderland, MA.) is a branching diagram or a tree showing the evolutionary relationships among various biological species or other entities based upon similarities and differences in their physical or genetic characteristics. All life on Earth is part of a single phylogenetic tree, indicating common ancestry. In a ''rooted'' phylogenetic tree, each node with descendants represents the inferred most recent common ancestor of those descendants, and the edge lengths in some trees may be interpreted as time estimates. Each node is called a taxonomic unit. Internal nodes are generally called hypothetical taxonomic units, as they cannot be directly observed. Trees are useful in fields of biology such as bioinformatics, systematics, and phylogenetics. ''Unrooted'' trees illustrate only the relatedness of the leaf nodes and do not require the ancestral root to b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sordariomycetes
Sordariomycetes is a class of fungi in the subdivision Pezizomycotina (Ascomycota), consisting of 28 orders, 90 families, 1344 genera. Sordariomycetes is from the Latin sordes (filth) because some species grow in animal feces, though growth habits vary widely across the class. Sordariomycetes generally produce their asci in perithecial fruiting bodies. Sordariomycetes are also known as Pyrenomycetes, from the Greek πυρἠν - 'the stone of a fruit' - because of the usually somewhat tough texture of their tissue. Sordariomycetes possess great variability in morphology, growth form, and habitat. Most have perithecial (flask-shaped) fruiting bodies, but ascomata can be less frequently cleistothecial (like in the genera '' Anixiella'', ''Apodus'', '' Boothiella'', ''Thielavia'', '' Zopfiella''),. Fruiting bodies may be solitary or gregarious, superficial, or immersed within stromata or tissues of the substrates and can be light to bright or black. Members of this group can grow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southeastern United States
The Southeastern United States, also referred to as the American Southeast or simply the Southeast, is a geographical region of the United States. It is located broadly on the eastern portion of the southern United States and the southern portion of the eastern United States. It comprises at least a core of states on the lower East Coast of the United States and eastern Gulf Coast. Expansively, it reaches as far north as West Virginia and Maryland (bordered to north by the Ohio River and Mason–Dixon line), and stretching as far west as Arkansas and Louisiana. There is no official U.S. government definition of the region, though various agencies and departments use different definitions. Geography The U.S. Geological Survey considers the Southeast region to be the states of Alabama, Florida, Georgia, Arkansas, Kentucky, Louisiana, Mississippi, North Carolina, South Carolina, and Tennessee, plus Puerto Rico and the United States Virgin Islands. There is no official Census Bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
