Loading...
  • cucumovirus
  • Cucumber mosaic virus (CMV) from the genus Cucumovirus, family Bromoviridae has great economic importance because it affects a wide range of hosts, including over 1300 species in more than 500 genera, over 100 families, with new hosts being reported each year ( 1 ). (ijbiotech.com)
  • genes
  • The symptoms induced by satellite RNAs are thought to be a consequence of silencing of host genes. (virology.ws)
  • Over the last two decades it has become increasingly clear that many RNA viruses add the capacity to exchange genetic material with one another, and to acquire genes from their hosts, to this evolutionary repertoire. (biology-online.org)
  • The use of resistant cultivars has been the most effective means of control, however plant virus resistance genes are frequently unavailable and their introgression into some crops is not straightforward. (apsnet.org)
  • RNAs
  • Virus preparations purified from naturally infected plants contained CMV genomic RNAs 1-4 and a satellite RNA named TTS-CARNA 5 (CARNA 5 for CMV-associated RNA 5). (uniba.it)
  • RNA silencing is an evolutionarily conserved antiviral mechanism, through which virus-derived small interfering RNAs (vsiRNAs) playing roles in host antiviral defense are produced in virus-infected plant. (frontiersin.org)
  • Class 3 satellite RNAs are 350-400 nucleotide long circles without an open reading frame. (virology.ws)
  • 1997) presented evidence for a splicing-like, transesterication mechanism to explain the in vitro generation of recombinants between RNAs associated with Qb bacteriophage ± a possible exception to the copy±choice model of recombination in RNA viruses. (biology-online.org)
  • plants
  • In this study, the profiles of vsiRNAs from leaves and fruits of Lagenaria siceraria plants infected with Cucumber green mottle mosaic virus (CGMMV) were comprehensively characterized and compared. (frontiersin.org)
  • vsiRNAs from both leaves and fruits were mostly 21- and 22-nt in size as previously described in other virus-infected plants. (frontiersin.org)
  • Satellite viruses may infect plants, animals, or bacteria. (virology.ws)
  • Not to be outdone, CSIRO Plant Industry (Australia) scientists Ming-Bo Wang and Neil Smith have made a breakthrough in understanding how viruses infect plants . (botany.one)
  • CMV has the broadest host range of any virus, and among the 1,000-plus host plants it affects are economically important food crops such as tomato, pepper, and lettuce. (apsnet.org)
  • Tobacco mosaic virus (TMV) is a positive-sense single stranded RNA virus that infects a wide range of plants, especially tobacco and other members of the family Solanaceae . (wn.com)
  • Tobacco mosaic virus ( TMV ) can be spread from many plants to tomatoes. (wn.com)
  • recombination
  • A second process, recombination, can occur ineither segmented or unsegmented viruses when `donor'nucleotide sequence is introduced into a single, contiguous ` acceptor ' RNA molecule to produce a new RNA containing genetic information from more than one source. (biology-online.org)
  • We then discuss some of the evolutionary implications of virus recombination and some of the constraints that may shape the variety of RNA virus recombination. (biology-online.org)
  • In some cases of RNA virus recombination, the donor sequence neatly replaces a homologous region of the acceptor sequence leaving its structure unchanged. (biology-online.org)
  • hybrid sequences resulting from aberrant homologous recombination (when similar viruses exchange sequence without maintaining strict alignment) and nonhomologous recombination (recombination between unrelated RNA sequences) are also commonly observed (Lai, 1992). (biology-online.org)
  • proteins
  • 1992, Plant Cell 4, 1425) recently identified two proteins from cucumber (Cucumis sativus L.) that induced extension in walls isolated from dicotyledons, but were relatively ineffective on grass coleoptile walls. (semanticscholar.org)
  • antigenic
  • Antigenic shift in in¯uenza A virus is an example of this sort of genetic exchange and serves as a good illustration of the potential evolutionary significance of such events. (biology-online.org)
  • TYLCV
  • Al-Shahwan IM, Harrison BD, Abdalla OA, Al-Saleh MA (1997) Detection of Tomato Yellow Leaf Curl Virus (TYLCV) and other geminiviruses in Saudi Arabia. (springer.com)
  • Al-Shahwan I, Abdalla O, AL-Saleh M (2001) Detection of tomato yellow leaf curl virus (TYLCV) in Saudi Arabia. (springer.com)
  • Genomes
  • Satellite RNA genomes range in length from 220-1500 nucleotides, and have been placed into one of three classes. (virology.ws)
  • Like satellite viruses, sputnik and others have similar relationships with their helper viruses: they require their helper for their propagation, but their genomes are not derived from the helper, and they negatively impact helper reproduction. (virology.ws)
  • So, in addition to producing prodigious amounts of the raw material of evolution (mutations), these viruses also possess mechanisms that, in principle, allow them both to purge their genomes of accumulated deleterious changes (Muller, 1964) and to create or spread bene locial combinations of mutations in an efficient manner (Fisher, 1930;Muller, 1932), two processes which are not available to clonal organisms. (biology-online.org)
  • Begomoviruses are economically important viruses with ssDNA containing monopartite or bipartite genomes, encapsulated in twinned particles belonging to family Geminiviridae . (springer.com)
  • interaction
  • Deep sequencing technology has revolutionized the study on the interaction between virus and plant host through the analysis of vsiRNAs profile. (frontiersin.org)
  • 1993
  • Carrère I (1993) Contribution à l'étude de l'ARN 3 du virus de la mosaïque du concombre: rôle dans la Symptomatologie et le transport du virus, thesis. (springer.com)