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Bidens Mottle Virus
''Bidens mottle virus'' (BiMoV) is a pathogenic plant virus in the plant virus family ''Potyviridae''. BiMoV is a flexuous filamentous particle, 720 nm long, and belongs to the Potyviridae genus ''Potyvirus''. Like other viruses in this genus, ''Bidens mottle virus'' is transmitted both mechanically by sap and by aphids in a stylet-borne fashion. BiMoV was first described in 1968 by Steve Christie, John Edwardson, and Bill Zettler from the Plant Pathology and Agronomy Departments at the University of Florida, Gainesville, Florida. This virus was originally isolated from a mottled plant of the common weed ''Bidens pilosa'' collected in Gainesville – hence the name ''Bidens mottle virus''. At the same time it was also found in pepperweed ('' Lepidium virginicum''). ''B. pilosa'' can be doubly infected with BiMoV and a second virus called '' Sonchus yellow net virus'' (SYNV). SYNV is asymptomatic in ''B. pilosa'' but it enhances the symptoms of BiMoV in this plant when ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lactuca Sativa
Lettuce (''Lactuca sativa'') is an annual plant of the family Asteraceae. It is most often grown as a leaf vegetable, but sometimes for its stem and seeds. Lettuce is most often used for salads, although it is also seen in other kinds of food, such as soups, sandwiches and wraps; it can also be grilled. One variety, celtuce (asparagus lettuce), is grown for its stems, which are eaten either raw or cooked. In addition to its main use as a leafy green, it has also gathered religious and medicinal significance over centuries of human consumption. Europe and North America originally dominated the market for lettuce, but by the late 20th century the consumption of lettuce had spread throughout the world. , world production of lettuce and chicory was 27 million tonnes, 56percent of which came from China. Lettuce was originally farmed by the ancient Egyptians, who transformed it from a plant whose seeds were used to obtain oil into an important food crop raised for its succulent leav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lettuce
Lettuce (''Lactuca sativa'') is an annual plant of the family Asteraceae. It is most often grown as a leaf vegetable, but sometimes for its stem and seeds. Lettuce is most often used for salads, although it is also seen in other kinds of food, such as soups, sandwiches and wraps; it can also be grilled. One variety, celtuce (asparagus lettuce), is grown for its stems, which are eaten either raw or cooked. In addition to its main use as a leafy green, it has also gathered religious and medicinal significance over centuries of human consumption. Europe and North America originally dominated the market for lettuce, but by the late 20th century the consumption of lettuce had spread throughout the world. , world production of lettuce and chicory was 27 million tonnes, 56percent of which came from China. Lettuce was originally farmed by the ancient Egyptians, who transformed it from a plant whose seeds were used to obtain oil into an important food crop raised for its succulent leav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centratherum Punctatum
''Centratherum punctatum'', also known by its common name Brazilian bachelor's button is a species of flowering plant from the 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 com ... '' Centratherum''. References Vernonieae {{Asteraceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flower Abortion
Abortion in flowers and developing fruits is a common occurrence in plants. An abortive flower is a flower that has a stamen but an under developed, or no pistil. It falls without producing fruit or seeds, due to its inability to fructify. Flowers require both male and female organs to reproduce, and the pistils and ovary serve as female organs, while the stamens are considered male organs. Illustrative examples include '' Urginea nagarjunae'' and ''Trichilogaster acaciaelongifoliae''. Studies have shown that hermaphrodites or bisexual flowers have higher rates of fruit abortions than unisexual flowers. __TOC__ Causes of fruit & flower abortion Pollinated flowers and fruits can abort selectively. It could be because of the order of pollination, the number of developing seeds, pollen source, or some combination of these. Flowers and fruits can also abort because of outside causes like insufficient light, unsuitable photo-period, high temperature, nutrient deficiency, ethylen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flower Break
A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Angiospermae). The biological function of a flower is to facilitate reproduction, usually by providing a mechanism for the union of sperm with eggs. Flowers may facilitate outcrossing (fusion of sperm and eggs from different individuals in a population) resulting from cross-pollination or allow selfing (fusion of sperm and egg from the same flower) when self-pollination occurs. There are two types of pollination: self-pollination and cross-pollination. Self-pollination occurs when the pollen from the anther is deposited on the stigma of the same flower, or another flower on the same plant. Cross-pollination is when pollen is transferred from the anther of one flower to the stigma of another flower on a different individual of the same species. Self-pollination happens in flowers where the stamen and carpel mature at the same time, and are positioned so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stunt (botany)
In botany and agriculture, stunting describes a plant disease that results in dwarfing and loss of vigor. It may be caused by infectious or noninfectious means. Infectious A stunt caused by infectious means usually is too late to cure. * Nematodes (eelworm) * Fungi * Bacteria * Viruses Noninfectious A stunt caused by noninfectious means could sometimes be remedied. * Physical environment ** Excess of water ** Lack of water ** Too-deep planting ** Excess light * Nutrition-related ** Soil nutrient imbalance * Injuries ** Chemical injury ** Physical injury ** Pest feeding See also * Soil retrogression and degradation * Soil pH * Soil types * Ramu stunt disease The Ramu stunt disease is a disease of the sugarcane widespread throughout Papua New Guinea, but not detected in Australia. ''Eumetopina flavipes'', the island sugarcane planthopper, is a species of planthopper present throughout South East Asia ..., a disease of the sugarcane widespread throughout Papua New Guine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vein Clearing
Veins are blood vessels in humans and most other animals that carry blood towards the heart. Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart. In contrast to veins, arteries carry blood away from the heart. Veins are less muscular than arteries and are often closer to the skin. There are valves (called ''pocket valves'') in most veins to prevent backflow. Structure Veins are present throughout the body as tubes that carry blood back to the heart. Veins are classified in a number of ways, including superficial vs. deep, pulmonary vs. systemic, and large vs. small. *Superficial veins are those closer to the surface of the body, and have no corresponding arteries. *Deep veins are deeper in the body and have corresponding arteries. *Perforator veins drain from the superficial to the deep veins. These are usually referred to in the lower limbs and feet. *Communica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Umbelliferous
Apiaceae or Umbelliferae is a family of mostly aromatic flowering plants named after the type genus ''Apium'' and commonly known as the celery, carrot or parsley family, or simply as umbellifers. It is the 16th-largest family of flowering plants, with more than 3,700 species in 434 generaStevens, P.F. (2001 onwards)Angiosperm Phylogeny Website Version 9, June 2008. including such well-known and economically important plants as ajwain, angelica, anise, asafoetida, caraway, carrot, celery, chervil, coriander, cumin, dill, fennel, lovage, cow parsley, parsley, parsnip and sea holly, as well as silphium, a plant whose identity is unclear and which may be extinct. The family Apiaceae includes a significant number of phototoxic species, such as giant hogweed, and a smaller number of highly poisonous species, such as poison hemlock, water hemlock, spotted cowbane, fool's parsley, and various species of water dropwort. Description Most Apiaceae are annual, biennial or perennial herbs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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