Effect of ultraviolet irradiation on tobacco mosaic virus infections in bean leaves

1964 ◽  
Vol 70 (6) ◽  
pp. 180-182 ◽  
Author(s):  
J. Semal
Keyword(s):  
Tobacco Mosaic Virus ◽  
Mosaic Virus ◽  
Ultraviolet Irradiation ◽  
Virus Infections ◽  
Bean Leaves

scholarly journals Tobacco mosaic virus and the study of early events in virus infections

1999 ◽  
Vol 354 (1383) ◽  
pp. 603-611 ◽  
Author(s):  
John G. Shaw
Keyword(s):  
Tobacco Mosaic Virus ◽  
Mosaic Virus ◽  
Host Cells ◽  
Progeny Virus ◽  
Virus Infections ◽  
Relevant Research ◽  
Protein Subunits ◽  
Virus Particles ◽  
Initial Interaction ◽  
Positive Strand Rna

In order to establish infections, viruses must be delivered to the cells of potential hosts and must then engage in activities that enable their genomes to be expressed and replicated. With most viruses, the events that precede the onset of production of progeny virus particles are referred to as the early events and, in the case of positive–strand RNA viruses, they include the initial interaction with, and the entry of, host cells and the release (uncoating) of the genome from the virus particles. Though the early events remain one of the more poorly understood areas of plant virology, the virus with which most of the relevant research has been performed is tobacco mosaic virus (TMV). In spite of this effort, there remains much uncertainty about the form or constituent of the virus that actually enters the initially invaded cell in a plant and about the mechanism(s) that trigger the subsequent uncoating (virion disassembly) reactions. A variety of approaches have been used in attempts to determine the fate of TMV particles that are involved in the establishment of an infection and these are briefly described in this review. In some recent work, it has been proposed that the uncoating process involves the bidirectional release of coat protein subunits from the viral RNA and that these activities may be mediated by cotranslational and coreplicational disassembly mechanisms.

scholarly journals Effects of DICER-like proteins 2, 3 and 4 on cucumber mosaic virus and tobacco mosaic virus infections in salicylic acid-treated plants

2009 ◽  
Vol 90 (12) ◽  
pp. 3010-3014 ◽  
Author(s):  
Mathew G. Lewsey ◽  
John P. Carr
Keyword(s):  
Salicylic Acid ◽  
Tobacco Mosaic Virus ◽  
Cucumber Mosaic Virus ◽  
Mosaic Virus ◽  
Rna Silencing ◽  
Rna Viruses ◽  
Virus Infections ◽  
Defence Mechanisms ◽  
Triple Mutant ◽  
Positive Sense

Salicylic acid (SA)-mediated resistance and RNA silencing are both important plant antiviral defence mechanisms. To investigate overlap between these resistance phenomena, we examined the ability of mutant Arabidopsis thaliana plants lacking DICER-like (DCL) endoribonucleases 2, 3 and 4 to exhibit SA-induced defence. We found that in dcl2/3/4 triple mutant plants, treatment with exogenous SA stimulated resistance to two positive-sense RNA viruses: cucumber mosaic virus and tobacco mosaic virus. We conclude that DCLs 2, 3 and 4, which are the predominant DCL endoribonucleases involved in silencing of positive-sense RNA viruses, are not required for effective SA-induced resistance to these viruses. However, the findings do not exclude RNA silencing from making a contribution to SA-mediated resistance in wild-type plants.

Susceptibility of Pinto Bean Leaves to Tobacco Mosaic Virus and its Relationship to Leaf Ribonuclease Content

Nature ◽  
1962 ◽  
Vol 193 (4816) ◽  
pp. 656-658 ◽  
Author(s):  
V. SANTILLI ◽  
C. M. NEPOKROEFF ◽  
N. C. GAGLIARDI
Keyword(s):  
Tobacco Mosaic Virus ◽  
Mosaic Virus ◽  
Pinto Bean ◽  
Bean Leaves
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