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Abutilon Mosaic Virus
Abutilon mosaic virus (AbMV) is a virus of the genus ''Begomovirus''. It infects Abutilon species, notably the flowering maple, ''Abutilon striatum''. The mottled or variegated effect on the leaves of ''Abutilon striatum'' is sought after. Host and symptoms The host of the virus is ''Abutilon striatum,'' an upright, evergreen shrub. Foliage is 3 to 5 lobed and serrated with rich green color and mottling of yellow. Flowers are yellow-orange with crimson veins. The species is native to Brazil but has been naturalized in South and Central America. Leaves become mottled with white or yellow mosaic that resembles variegation. The mottled patches are angular in appearance, and they are limited by veins. Some plants experience stunting, a decrease in photosynthetic potential caused by the reduction of chlorophyll, and they can dehydrate more readily. The symptoms are cosmetic in nature, so infection does not kill the plant, which will still be able to flower and reproduce even when in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Begomovirus
''Begomovirus'' is a genus of viruses, in the family ''Geminiviridae''. They are plant viruses that as a group have a very wide host range, infecting dicotyledonous plants. Worldwide they are responsible for a considerable amount of economic damage to many important crops such as tomatoes, beans, squash, cassava and cotton. There are 445 species in this genus. Morphology Virus particles are non-enveloped. The nucleocapsid is 38 nanometers (nm) long and 15–22 nm in diameter. While particles have basic icosahedral symmetry, they consist of two incomplete icosahedra—missing one vertex—joined together. There are 22 capsomeres per nucleocapsid. Genome Single stranded closed circular DNA. Many begomoviruses have a bipartite genome: this means that the genome is segmented into two segments (referred to as DNA A and DNA B) that are packaged into separate particles. Both segments are generally required for successful symptomatic infection in a host cell but DNA B is depe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abutilon
''Abutilon'' is a large genus of flowering plants in the mallow family, Malvaceae. It is distributed throughout the tropics and subtropics''Abutilon''. Flora of China. of the Americas, Africa, Asia, and Australia. General common names include Indian mallow''Abutilon''. Integrated Taxonomic Information System (ITIS). and velvetleaf; ornamental varieties may be known as room maple, parlor maple, or flowering maple. The genus name is an 18th-century word that came from the Arabic ' (), the name given by |
Abutilon Striatum
''Abutilon pictum'', syn. ''Abutilon striatum'' (disputed), is a species of flowering plant in the family Malvaceae. It is native to southern Brazil, Argentina, Paraguay and Uruguay. The plant has become naturalised in Central America, and is used in horticulture. Common names include redvein abutilon, red vein Indian mallow, redvein flowering maple, Chinese-lantern and red vein Chinese lanterns. Description ''Abutilon pictum'' is a shrub growing to tall by wide.PFAF . accessed 5.15.2013 The leaves are 5–15 cm long, three- to five- (rarely seven-) lobed. The yellow to orange-red bell shaped flowers have prominent dark red veining, with five petals 2–4 cm long. It blooms from April to September, and longer in warmer subtropical areas. The flowers attract pollinators, such as native [...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] |
Genetic Recombination
Genetic recombination (also known as genetic reshuffling) is the exchange of genetic material between different organisms which leads to production of offspring with combinations of traits that differ from those found in either parent. In eukaryotes, genetic recombination during meiosis can lead to a novel set of genetic information that can be further passed on from parents to offspring. Most recombination occurs naturally and can be classified into two types: (1) ''interchromosomal'' recombination, occurring through independent assortment of alleles whose loci are on different but homologous chromosomes (random orientation of pairs of homologous chromosomes in meiosis I); & (2) ''intrachromosomal'' recombination, occurring through crossing over. During meiosis in eukaryotes, genetic recombination involves the pairing of homologous chromosomes. This may be followed by information transfer between the chromosomes. The information transfer may occur without physical exchange (a se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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