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Becurtovirus
''Becurtovirus'' is a genus of viruses, in the family ''Geminiviridae ''Geminiviridae'' is a family of plant viruses that encode their genetic information on a circular genome of single-stranded (ss) DNA. There are 520 species in this family, assigned to 14 genera. Diseases associated with this family include: b ...''. Dicotyledonous plants serve as natural hosts. There are three species in this genus. Taxonomy The following three species are assigned to the genus: *'' Beet curly top Iran virus'' *'' Exomis microphylla latent virus'' *'' Spinach curly top Arizona virus'' Structure Viruses in ''Becurtovirus'' are non-enveloped, with icosahedral geometries, and T=1 symmetry. Genomes are circular and non-segmented, around 3.0kb in length. Life cycle Viral replication is nuclear. Entry into the host cell is achieved by penetration into the host cell. Replication follows the ssDNA rolling circle model. DNA-templated transcription is the method of transcription. The virus exi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geminiviridae
''Geminiviridae'' is a family of plant viruses that encode their genetic information on a circular genome of single-stranded (ss) DNA. There are 520 species in this family, assigned to 14 genera. Diseases associated with this family include: bright yellow mosaic, yellow mosaic, yellow mottle, leaf curling, stunting, streaks, reduced yields. They have single-stranded circular DNA genomes encoding genes that diverge in both directions from a virion strand origin of replication (i.e. geminivirus genomes are ambisense). According to the Baltimore classification they are considered class II viruses. It is the largest known family of single stranded DNA viruses. Mastrevirus and curtovirus Transmission (medicine), transmission is via various leafhopper species (e.g. maize streak virus and other African streak viruses are transmitted by ''Cicadulina mbila''), the only known topocuvirus species, ''Tomato pseudo-curly top virus'', is transmitted by the treehopper ''Micrutalis malleifera'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viruses
A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea. Since Dmitri Ivanovsky's 1892 article describing a non-bacterial pathogen infecting tobacco plants and the discovery of the tobacco mosaic virus by Martinus Beijerinck in 1898,Dimmock p. 4 more than 9,000 virus species have been described in detail of the millions of types of viruses in the environment. Viruses are found in almost every ecosystem on Earth and are the most numerous type of biological entity. The study of viruses is known as virology, a subspeciality of microbiology. When infected, a host cell is often forced to rapidly produce thousands of copies of the original virus. When not inside an infected cell or in the process of infecting a cell, viruses exist in the form of independent particles, or ''virions'', consisting of (i) the genetic material, i.e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beet Curly Top Iran Virus
The beetroot is the taproot portion of a beet plant, usually known in North America as beets while the vegetable is referred to as beetroot in British English, and also known as the table beet, garden beet, red beet, dinner beet or golden beet. It is one of several cultivated varieties of ''Beta vulgaris'' grown for their edible taproots and leaves (called beet greens); they have been classified as ''B. vulgaris'' subsp. ''vulgaris'' Conditiva Group. Other cultivars of the same species include the sugar beet, the leaf vegetable known as chard or spinach beet, and mangelwurzel, which is a fodder crop. Three subspecies are typically recognized. Etymology ''Beta'' is the ancient Latin name for beetroot,Gledhill, David (2008). "The Names of Plants". Cambridge University Press. (hardback), (paperback). pp 70 possibly of Celtic origin, becoming ''bete'' in Old English. ''Root'' derives from the late Old English ''rōt'', itself from Old Norse ''rót''. History The domesticati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exomis Microphylla Latent Virus
The exomis ( grc, ἐξωμίς from ''exo'' "outside", and ''omos'' "shoulder") was a Greek tunic used by the workers and the light infantry. The tunic largely replaced the older chitoniskos (or short chiton) as the main tunic of the hoplites during the later 5th century BC. It was made of two rectangles of linen (other materials were also used), which were stitched together from the sides to form a cylinder, leaving enough space at the top for the arms. An opening at the top was also left for the head. The cylinder was gathered up at the waist with a cloth belt using a reef knot, which made the cloth fall down over the belt, hiding it from view. To allow freedom of movement to the right arm, the seam at the right shoulder was taken apart, and the right hand was passed through the head opening. The color of the tunic varied, but red (especially crimson) was increasingly the standard color preferred by hoplites during and after the Peloponnesian War. The exomis could be worn in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spinach Curly Top Arizona Virus
Spinach (''Spinacia oleracea'') is a leafy green flowering plant native to central and western Asia. It is of the order Caryophyllales, family Amaranthaceae, subfamily Chenopodioideae. Its leaves are a common edible vegetable consumed either fresh, or after storage using preservation techniques by canning, freezing, or dehydration. It may be eaten cooked or raw, and the taste differs considerably; the high oxalate content may be reduced by steaming. It is an annual plant (rarely biennial), growing as tall as . Spinach may overwinter in temperate regions. The leaves are alternate, simple, ovate to triangular, and very variable in size: long and broad, with larger leaves at the base of the plant and small leaves higher on the flowering stem. The flowers are inconspicuous, yellow-green, in diameter, and mature into a small, hard, dry, lumpy fruit cluster across containing several seeds. In 2018, world production of spinach was 26.3 million tonnes, with China alone accounting f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
