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Celery Mosaic Virus
Celery mosaic virus (CeMV) is a plant pathogenic virus in the genus'' Potyvirus '' and the virus family '' Potyviridae ''. In California, mosaic diseases of celery (''Apium graveolens'') were reported as early as 1922. After some time, it became clear that there were at least two different viruses causing mosaic diseases with similar symptoms in celery. These two viruses were first differentiated by host range. One of the viruses had a wide host range and was named ''Southern celery mosaic''. The second had a host range restricted to the family Umbelliferae (Apiaceae) and was called ''Western celery mosaic''. Continued research showed that the ''Southern mosaic virus'' was actually an isolate of ''Cucumber mosaic virus'' and '' Western celery mosaic'' eventually became known simply as ''Celery mosaic virus''. Symptoms and host range Symptoms of celery mosaic virus include a distinct mottled pattern on the leaves, distorted leaf growth with exaggerated rosette formation. Some ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ontario Sessional Papers, 1917, No
Ontario is the southernmost province of Canada. Located in Central Canada, Ontario is the country's most populous province. As of the 2021 Canadian census, it is home to 38.5% of the country's population, and is the second-largest province by total area (after Quebec). Ontario is Canada's fourth-largest jurisdiction in total area of all the Canadian provinces and territories. It is home to the nation's capital, Ottawa, and its most populous city, Toronto, which is Ontario's provincial capital. Ontario is bordered by the province of Manitoba to the west, Hudson Bay and James Bay to the north, and Quebec to the east and northeast. To the south, it is bordered by the U.S. states of (from west to east) Minnesota, Michigan, Ohio, Pennsylvania, and New York. Almost all of Ontario's border with the United States follows rivers and lakes: from the westerly Lake of the Woods, eastward along the major rivers and lakes of the Great Lakes/Saint Lawrence River drainage system. There is o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parsnip
The parsnip (''Pastinaca sativa'') is a root vegetable closely related to carrot and parsley, all belonging to the flowering plant family Apiaceae. It is a biennial plant usually grown as an annual. Its long taproot has cream-colored skin and flesh, and, left in the ground to mature, becomes sweeter in flavor after winter frosts. In its first growing season, the plant has a rosette of pinnate, mid-green leaves. If unharvested, it produces a flowering stem topped by an umbel of small yellow flowers in its second growing season, later producing pale brown, flat, winged seeds. By this time, the stem has become woody, and the taproot inedible. Precautions should be taken when handling the stems and foliage, as parsnip sap can cause a skin rash or even blindness if exposed to sunlight after handling. The parsnip is native to Eurasia; it has been used as a vegetable since antiquity and was cultivated by the Romans, although some confusion exists between parsnips and carrots i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viral Plant Pathogens And Diseases
The word ''Viral'' means "relating to viruses" (small infectious agents). It may also refer to: Viral behavior, or virality Memetic behavior likened that of a virus, for example: * Viral marketing, the use of existing social networks to spread a marketing message * Viral phenomenon, relating to contagion theory or the "virality" of network culture, such as a meme * Viral video Viral videos are video, videos that become popular through viral phenomenon, a viral process of Internet sharing, primarily through video sharing websites such as YouTube as well as social media and email.Lu Jiang, Yajie Miao, Yi Yang, ZhenZhon ..., a video that quickly attains a high popularity Titled works * Viral (2016 American film), ''Viral'' (2016 American film), a 2016 American science fiction horror drama * Viral (2016 Hindi film), ''Viral'' (2016 Hindi film), an Indian Bollywood film based on social media * Viral (upcoming film), ''Viral'' (upcoming film), an American psychological thri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Open Reading Frame
In molecular biology, reading frames are defined as spans of DNA sequence between the start and stop codons. Usually, this is considered within a studied region of a prokaryotic DNA sequence, where only one of the six possible reading frames will be "open" (the "reading", however, refers to the RNA produced by transcription of the DNA and its subsequent interaction with the ribosome in translation). Such an open reading frame (ORF) may contain a start codon (usually AUG in terms of RNA) and by definition cannot extend beyond a stop codon (usually UAA, UAG or UGA in RNA). That start codon (not necessarily the first) indicates where translation may start. The transcription termination site is located after the ORF, beyond the translation stop codon. If transcription were to cease before the stop codon, an incomplete protein would be made during translation. In eukaryotic genes with multiple exons, introns are removed and exons are then joined together after transcription to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mulch
A mulch is a layer of material applied to the surface of soil. Reasons for applying mulch include conservation of soil moisture, improving soil fertility, fertility and health of the soil, reducing Weed control, weed growth, and enhancing the visual appeal of the area. A mulch is usually, but not exclusively, organic in nature. It may be permanent (e.g. plastic sheeting) or temporary (e.g. barkdust, bark chips). It may be applied to bare soil or around existing plants. Mulches of manure and compost will be incorporated naturally into the soil by the activity of worms and other organisms. The process is used both in commercial crop production and in gardening, and when applied correctly, can improve soil productivity. Living mulches include moss lawnsMoss Myths/ref> and other ground covers. Uses Many materials are used as mulches, which are used to retain soil moisture, regulate soil temperature, suppress weed growth, and for aesthetics. They are applied to the soil surface, ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stylet (anatomy)
A stylet is a hard, sharp, anatomical structure found in some invertebrates. For example, the word ''stylet'' or stomatostyle is used for the primitive piercing mouthparts of some nematodes and some nemerteans. In these groups the stylet is a hardened protrusible opening to the stomach. These stylets are adapted for the piercing of cell walls and usually function by providing the operative organism with access to the nutrients contained within the prey cell. The mouthparts of tardigrades, diptera and aphid Aphids are small sap-sucking insects in the Taxonomic rank, family Aphididae. Common names include greenfly and blackfly, although individuals within a species can vary widely in color. The group includes the fluffy white Eriosomatinae, woolly ...s are also called stylets. In octopodes, the stylets are internal, needle-like bent rods within the mantle, the vestigial remnants of an external shell. References Nematode anatomy {{Animal-anatomy-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aphids
Aphids are small sap-sucking insects in the Taxonomic rank, family Aphididae. Common names include greenfly and blackfly, although individuals within a species can vary widely in color. The group includes the fluffy white Eriosomatinae, woolly aphids. A typical life cycle involves flightless females giving Viviparity, live birth to female Nymph (biology), nymphs—who may also be already Pregnancy, pregnant, an adaptation scientists call telescoping generations—without the involvement of males. Developmental biology, Maturing rapidly, females breed profusely so that the number of these insects multiplies quickly. Alate, Winged females may develop later in the season, allowing the insects to colonize new plants. In Temperate climate, temperate regions, a phase of sexual reproduction occurs in the autumn, with the insects often overwintering as eggs. The life cycle of some species involves an alternation between two species of host plants, for example between an annual crop and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apium Virus Y
''Apium virus Y'' (ApVY) is a plant pathogenic virus in the genus ''Potyvirus'' and the virus family ''Potyviridae''. Apium virus Y is a recently described member of the potyvirus family. It was first found in Australia in 2002 in poison hemlock (''Conium maculatum'': an immigrant weed in Australia). A survey of native and weed species in the family Apiaceae found ApVY to be widespread in Australia. In addition, this survey and others found two other potyviruses. One was a well-known potyvirus infecting the Apiaceae, ''Celery mosaic virus'' (CeMV). CeMV has been found in celery (''Apium graveolens'') crops worldwide, including Australia, New Zealand and the US. The third potyvirus found in these surveys was another previously unknown potyvirus, '' Carrot virus Y'' (CarVY). Geographic distribution Since its sequence was first deposited in GenBank, ApVY has been found in New Zealand,J. Tang, G. R. G. Clover, and B. J. R. Alexander 2007. First Report of ''Apium virus Y'' in Cel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chenopodiaceae
Amaranthaceae ( ) is a family of flowering plants commonly known as the amaranth family, in reference to its type (biology), type genus ''Amaranthus''. It includes the former goosefoot family Chenopodiaceae and contains about 165 genera and 2,040 species, making it the most species-rich lineage within its parent order (biology), order, Caryophyllales. Description Most species in the Amaranthaceae are Annual plant, annual or perennial herbs or subshrubs; others are shrubs; very few species are vines or trees. Some species are succulent. Many species have stems with thickened nodes. The wood of the perennial stem has a typical "anomalous" secondary growth; only in subfamily Polycnemoideae is secondary growth normal. The Leaf, leaves are simple and mostly alternate, sometimes opposite. They never possess stipules. They are flat or terete, and their shape is extremely variable, with entire or toothed margins. In some species, the leaves are reduced to minute scales. In most cases, n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apium Leptophyllum
''Cyclospermum leptophyllum'' (also, ''Ciclospermum l.'') is a species of plant in the family Apiaceae known by the common names marsh parsley, slender celery and fir-leaved celery; one source also mentions the name of wild cherry, although this may be a misspelling of "wild celery". This is a plant found worldwide at warm temperate to tropical latitudes and is considered a noxious weed in many areas. It is a taprooted branching herb reaching just over half a meter in height at maximum. It has threadlike green leaves a few centimeters long and small umbel UMBEL (Upper Mapping and Binding Exchange Layer) is a logically organized knowledge graph of 34,000 concepts and entity types that can be used in information science for relating information from disparate sources to one another. It was retired ...s of spherical flowers. Host plant for Eastern Black Swallowtail butterflies. The 1889 book 'The Useful Native Plants of Australia’ records that a common name included "Wild Pars ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ptilimnium
''Ptilimnium'' is a group of plants in the family Apiaceae described as a genus in 1819. The common name is mock bishopweed or mock bishop's weed. It is endemic to the United States, primarily in the Southeast, the Lower Mississippi Valley, and the Lower Great Plains. Species , Plants of the World Online accepted five species: * '' Ptilimnium ahlesii'' Weakley & G.L.Nesom * ''Ptilimnium capillaceum ''Ptilimnium capillaceum'', known by the common name of herbwilliam, is a member of the carrot family, Apiaceae. It is a perennial herb, native to the eastern United States, from Texas to Massachusetts Massachusetts ( ; ), officially t ...'' (Michx.) Raf. - SE + SC + NE USA * '' Ptilimnium costatum'' (Elliott) Raf. - SC USA * '' Ptilimnium nuttallii'' (DC.) Britton - SC USA * '' Ptilimnium texense'' J.M. Coult. & Rose - Texas, Louisiana, Florida ''Ptilimnium nodosum'' (Rose) Mathias, native to Georgia and South Carolina, is treated as '' Harperella nodosa'' by Plants of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poison Hemlock
''Conium maculatum'', commonly known as hemlock (British English) or poison hemlock (American English), is a highly poisonous flowering plant in the carrot family Apiaceae, native to Europe and North Africa. It is herbaceous, with no woody parts, and has a biennial lifecycle. Hemlock is a hardy plant capable of living in a variety of environments and is now widely naturalised in locations outside its native range, including parts of Australia, West Asia, and North and South America, to which it has been introduced. It is capable of spreading and thereby becoming an invasive weed. All parts of the hemlock plant are toxic, particularly the seeds and roots, and especially when ingested. Under the right conditions, the plant grows quite rapidly during the growing season, and can reach heights of , with a long penetrating root. The plant has a distinctive odour that is usually considered unpleasant and carries with the wind. The hollow stems are usually spotted dark maroon and turn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
