
	Where results make sense

Topic: Plant viruses

Related Topics

flowering plant

Robert Plant

power plant

vascular plants

perennial plant

nuclear power plant

Jacques Plante

annual plant

hop plant

reed plant

Jardin des Plantes

Violet plant

In the News (Tue 29 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Plant virus - Wikipedia, the free encyclopedia
		Plant viruses, like all other viruses, are obligate intracellular parasites that do not have the molecular machinery to replicate without the host.
		Plant Viruses are not nearly as well understood as the animal counterparts, this is ironic as the first virus to be discovered (see below) was the Tobacco Mosaic Virus (TMV) as well as the fact that they have a predicted US$ 6 x 1010 per year economic influence on crops worldwide.
		Plant and Animal viruses do have a lot in common with each other; however, there are some differences worth noting this is due to the differing host environment and strategies to combat host infection.
	en.wikipedia.org /wiki/Plant_virus (713 words)

	Transmission of plant viruses - Wikipedia, the free encyclopedia
		Viruses are known to infect both plant cells and animal cells.
		The mobility of animals increases the mechanisms of viral transmission that have evolved, whereas plants remain immobile and thus viruses must rely on environmental factors to be transmitted between hosts.
		These differences, combined with the fact that plants are immobile, have resulted in plant viruses relying on the wind and soil to transmit seeds as well as vectors.
	en.wikipedia.org /wiki/Transmission_of_plant_viruses (471 words)

	Plant Viruses
		Plant viruses rely on a mechanical breach of the integrity of a cell wall to directly introduce a virus particle into a cell.
		In some instances, viruses are transmitted mechanically from one plant to the next by the vector and the insect is merely a means of distribution, flying or being carried on the wind for long distances (sometimes hundreds of miles).
		These viruses cause a great deal of crop damage in plants such as tomatoes, beans, squash, cassava and cotton and their spread may be directly linked to the inadvertent world-wide dissemination of the "B" or silverleaf biotype of the whitefly Bemisia tabaci.
	www-micro.msb.le.ac.uk /3035/Plant.html (1986 words)

	Introduction to plant viruses
		Infected plants may show a range of symptoms depending on the disease but often there is leaf yellowing (either of the whole leaf or in a pattern of stripes or blotches), leaf distortion (e.g.
		Most plant viruses are therefore transmitted by a vector organism that feeds on the plant or (in some diseases) are introduced through wounds made, for example, during cultural operations (e.g.
		Most plant viruses have at least 3 genes: 1 (or more) concerned with replication of the nucleic acid, 1 (or more) concerned with cell-to-cell movement of the virus and 1 (or more) encoding a structural protein that is assembled into the virus particle (usually called the "coat" or "capsid" protein).
	www.dpvweb.net /intro/index.php (2624 words)

	Botany online: Plant Viruses and Viroids
		Viruses (Virus particles or virions) are usually units consisting of nucleic acids and coat proteins called capsids.
		Although with viruses, the term ‘species’ may not quite correspond to the way it is defined in biological systematics, it is perfectly reasonable and common to use it for viruses, too, since all viruses and viroids contain an original genome with a species-specific information.
		Since decades now, plant viruses (and especially the TMV) are favourite test objects of pure research due to the large amounts of material extractable from infected plants.
	www.biologie.uni-hamburg.de /b-online/e35/35.htm (1661 words)

	Greenhouse Plant Viruses (TSWV/INSV)
		Plant viruses, as a rule, are named after the first plant on which they are found.
		All viruses are obligate parasites, which means they cannot survive outside of their host and must be moved from one plant to another by seed or Insects.
		The viruses and a thrips vector may be introduced into the greenhouse together on a thrips- or virus-infested plant, or they may arrive in separate shipments.
	www.ext.colostate.edu /pubs/Garden/02947.html (1325 words)

	Vectors of Plant Viruses
		Viruses are categorized into over 30 distinct groups which are classified as families and genera.
		(1958) that certain nematodes are vectors of plant viruses initiated research in Nematology and Virology that resulted in understanding of the transmission and etiology of an important group of soil-borne plant virus diseases.
		As with other viruses vectored by longidorid and trichodorid nematodes, it is selectively and specifically adsorbed at the retention site, indicating a specific association between protein coat of virus and cuticular surface.
	plpnemweb.ucdavis.edu /nemaplex/Plntpara/pltvirus.htm (3933 words)

	Introduction to Plant Viruses
		Plant viruses usually multiply only within living plant cells, but some may be able to multiply within the bodies of aphids and nematodes.
		A given plant virus may be able to multiply only within the living cells of one species or genera of plants, but some can multiply within the cells of a wide group of plant families.
		The indicator plant for sweetpotato viruses is Brazilian Morning glory, tabacco, tomato, lambsquarter, and other plants are used as indicators in the sap and grafting assays.
	www.disknet.com /indiana_biolab/v030.htm (980 words)

	Viruses
		Viruses have evolved to infect every form of life, from animal to plant and from fungi to bacteria.
		Plant viruses are not equipped to infect animal cells, for example, though a certain plant virus could infect a number of related plants.
		The new viruses are either released from the host cell without destroying the cell or eventually build up to a large enough number that they burst the host cell like an overfilled water balloon.
	www.microbe.org /microbes/virus1.asp (815 words)

	Plant viruses: major threat to crops -DAWN - Business; April 1, 2002
		The most obvious symptoms of virus-infected plants are usually those appearing on the foliage, but some viruses may cause striking symptoms on the stem, fruit, and roots, with or without symptoms’ development on the levels.
		The viruses causing most mosaic diseases are mechanically transmitted and usually have aphid vectors in nature, are generally resistant to brief heat treatments and do not stop flowering or effect the dormancy of buds.
		Control: Several methods for control of plant viruses are being practised, which may be divided in to three main group viz.: (1) resistance or immunity to virus(2) prophylactic measures and (3) direct protection.
	www.dawn.com /2002/04/01/ebr10.htm (1679 words)

	All the Virology on the WWW - Plant Viruses
		Plant Virology Lab, Plant Pest Diagnostics Center, CDFA (URL) Plant Virology Lab - General news of plant viruses in California with downloadable images and link to "Index of Plant Virus, Viroid, and Phytoplasma Diseases in California", a searchable database.
		Plant Viruses Online: This is an enhanced html version of the VIDE database of plant viruses as published by CABI in 1996 Brunt, Crabtree, Dallwitz, Gibbs and Watson "Viruses of Plants" CABI - descriptions of c.920 virus species and 55 generic summaries for up to 500 or so characters.
		The scope of the journal includes bionomics of plant parasitic organisms, reaction of plant tissues to parasitism, biochemistry and physiology of pesticides, and new approaches in the control of pests and diseases, particularly those occurring in subtropical and semi-arid regions.
	www.virology.net /garryfavwebplant.html (1258 words)

	Entry of Plant and Fungal Viruses (Site not responding. Last check: 2007-10-11)
		Live plant cells interconnect only via specific discontinuities in the cellulose walls: the most numerous of these are plasmodesmata, which are complex structures filled with membrane-derived processes continuous with the endoplasmic reticulum.
		Plant viruses have therefore evolved specific movement functions, mediated by one or more virus-specified proteins, which interact with the plasmosdesmatal machinery so as to increase the "pore" size, and allow specific transport of viral nucleoprotein complexes.
		Viruses which are introduced into plants via insect vectors with piercing mouthparts, on the other hand, tend to be limited in their multiplication to phloem elements, which are preferred target tissues for insect feeding.
	www.mcb.uct.ac.za /tutorial/virusentplant.htm (660 words)

	Viruses, Viruses, Viruses
		It and flu, which are the two nonequilibrium viruses that most bother us, do not follow the rule of poor spreading as a guest in the population, because they are able to pass well enough from person to person that they can be a serious problem.
		Among the non-equilibrium viruses are the influenza, HIV, SARS, Ebola, and Hantaan viruses.
		Plant viruses are, actually, responsible for one of the few good things viruses do; they can cause beautiful streaking in flowers.
	pr.caltech.edu /periodicals/EandS/articles/LXVII1/viruses.html (5778 words)

	Plant Viruses (Site not responding. Last check: 2007-10-11)
		Plant viruses, like fungi and bacteria, are infectious agents that can cause considerable losses in agriculture.
		Inside the plant, viruses move from cell to cell through plasmodesmata, the membrane-lined, symplastic channels, that connect neighboring cells.
		In comparison, many animal viruses are extruded from infected cells as membrane lined vesicles, a mode of spread that is untypical in plants.
	www.bio.utk.edu /vonarnim/BOT404/BOT404PlantViruses.html (2092 words)

	Plant Viruses Online - Home Page
		The names of such viruses include their generic names, in italics, in the style introduced by Fenner (1976).
		Viruses are, however, a particularly disparate group of pathogens, and this has made it impossible to define a set of genuinely homologous characters that apply to all plant viruses.
		Assignment of plant genera to families follows Watson and Dallwitz, 1991; and Watson and Dallwitz, 1992 onwards.
	image.fs.uidaho.edu /vide/refs.htm (2492 words)

	About Viruses
		Viruses are among the smallest and simplest entities that can cause disease.
		Because viruses are microscopic, the presence of a virus is only noticed if it produces recognizable symptoms in the organism it is infecting.
		Unfortunately not all viruses cause dramatic symptoms and sometimes virus-like symptoms can be caused by other things such as environmental factors, insect damage, or improper nutrition.
	plantpath.ifas.ufl.edu /pdc/Inclusionpage/aboutv.html (361 words)

	APSnet Feature - New and Emerging Plant Viruses (Site not responding. Last check: 2007-10-11)
		Viruses require avenues of entry into their plant hosts and arthropods of many types play the role of vectors.
		Variability may be driven by the host component as new resistance genes are developed against a population of vectors and viruses, by the vector component as they mutate and adapt to new host systems, or by the virus as mutations and recombinations occur.
		Some arthropod vectors of plant viruses are difficult to see and difficult to handle, but are efficient as vectors of viruses.
	www.apsnet.org /online/feature/NewViruses/Top.html (2925 words)

	Plant DNA viruses and gene silencing (Abstract) (Site not responding. Last check: 2007-10-11)
		Plant DNA viruses, both the ssDNA geminiviruses and the reverse-transcribing pararetroviruses, have properties with the potential to initiate gene silencing in the nucleus and in the cytoplasm.
		Evidence is emerging that geminiviruses and plant pararetroviruses can interact with the gene silencing system either from introduced DNA constructs or during viral pathogenesis.
		In this article, features of plant DNA viruses are discussed in relation to gene silencing phenomena, and the prospects for understanding the interaction between nuclear and cytoplasmic silencing processes.
	www.biotech-info.net /DNA_viruses.html (254 words)

	Soybean-Insect-Virus Complex in Wisconsin (Site not responding. Last check: 2007-10-11)
		Bean pod mosaic virus, soybean mosaic virus, alfalfa mosaic virus, and tobacco streak virus are the viruses most commonly found in the symptomatic plants.
		Viruses are submicroscopic particles of DNA or RNA that cause disease in plants.
		In addition to damage caused by direct feeding, both of these pests are capable of transmitting specific soybean viruses from plant to plant.
	www.plantpath.wisc.edu /soyhealth/virus.htm (322 words)

	ScienceDaily: Plant Viruses Discover How To Overcome Gene Silencing
		These plants were immune to viruses engineered to contain that reporter gene, but were not immune to otherwise identical viruses that did not contain the gene.
		Plant Pathologists Explore Using Fungi To Control Plant Diseases (June 15, 2005) -- The use of endophytes, non-harmful fungi, bacteria, or viruses that naturally grow inside plants, is an emerging tool for managing plant diseases, say plant pathologists with The American...
		Transgenic plants -- Transgenic plants are plants that have been genetically engineered, a breeding approach that uses recombinant DNA techniques to create plants with new characteristics.They are identified as a class...
	www.sciencedaily.com /releases/1998/11/981119073600.htm (1886 words)

	The Viral Genomes Resource
		Viruses have been found in all cellular forms of life, from bacteria to chordates.
		Pathogenic human and animal viruses are causative agents of serious diseases such as AIDS, encephalitides, hepatitides, influenza, SARS, etc. Plant viruses are responsible for many major agricultural problems.
		Therefore, studying various viruses and their interaction with hosts is a prerequisite for finding remedies against viral diseases and understanding the principles of the organization of life.
	www.ncbi.nlm.nih.gov /genomes/VIRUSES/viruses.html (238 words)

	Plant Viruses (Site not responding. Last check: 2007-10-11)
		Topics include: biological control of plant viruses, viruses of sweet pepper and chilli, viruses of Alstroemeria, viruses and viroids of chrysanthemum and viruses of pot and bedding plants.
		Viruses of Plants in Australia - Introduction to Viruses of Plants in Australia, List of virus names occurring in Australia, List of host plants families and species, List of host plants genera and species, Features of viruses in Australia, Character list.
		Xiong's Virology Page (University of Arizona) - Plant viruses and virus-host interactions; molecular mechanisms of plant resistance and evolution of viral pathogenicity; gene expression and replication and RNA and DNA viruses.
	www.infochembio.ethz.ch /links/en/virol_pflanzenviren.html (510 words)

	Plant viruses: hard to detect; harder to control (Site not responding. Last check: 2007-10-11)
		Because virus-infected potato plants cannot be cured, as is the case for potatoes infected with fungi or bacteria, strategies for virus disease control must focus on preventive measures such as the use of resistant varieties, the control of insect vectors, and the detection and elimination of contaminated plants and seed.
		Zandstra notes that case studies on the interaction between potato plants and potato leafroll virus, the most damaging of the potato viruses, are helping CIP researchers discover different types of genetic resistance mechanisms in potato species.
		Because planting materials quickly become infected in the field, stocks must be renewed frequently, thus increasing the cost of production.
	www.cipotato.org /potato/Pests_Disease/viruscontrol.htm (1294 words)

	Botany online: Plant Viruses and Viroids - Single-Stranded RNA-Viruses - TMV
		He succeeded in infecting plants with the tobacco mosaic disease by applying a bacteria-free sap gained from infected tobacco leaves.
		It remains unknown whether this phenomenon is linked to the symptoms displayed by the infected plant or to the replication of the viruses.
		In satellite viruses, the infectiousness depends on the presence of a helper virus.
	www.biologie.uni-hamburg.de /b-online/e35/35a.htm (1817 words)

	APSnet Feature - New and Emerging Plant Viruses - Abstracts (Site not responding. Last check: 2007-10-11)
		Many of today's viruses are among those first described in the first third of the century and may be re- emerging with increasing pathogenic diversity as crop plants with resistance genes are developed.
		These questions can be asked for the early viruses as well as for the numerous entirely new viruses that have emerged in the last third of the century to cause serious new diseases.
		These viruses affect herbaceous plants and since the early 1980's several have rapidly emerged as the causal agents for important diseases within temperate, tropical and sub- tropical regions of the world.
	www.apsnet.org /online/feature/NewViruses/abstracts.htm (1564 words)

Try your search on: Qwika (all wikis)