Where does tobacco mosaic virus come from?
TMV is very easily transmitted when an infected leaf rubs against a leaf of a healthy plant, by contaminated tools, and occasionally by workers whose hands become contaminated with TMV after smoking cigarettes. A wounded plant cell provides a site of entry for TMV.
How does tobacco mosaic virus affect plants?
The tobacco mosaic virus infects tobacco and lots of other closely related species like tomatoes and peppers. It is transmitted by contact between plants, either naturally or on the hands of farmers. It infects the chloroplasts of plant leaves and changes their colour from green to yellow or white in a mosaic pattern.
Which of the following host plant is caused by tobacco mosaic virus?
What is TMV? TMV is a single-stranded RNA virus that commonly infects Solanaceous plants, which is a plant family that includes many species such as petunias, tomatoes and tobacco.
How is TMV used in biotechnology?
Recombinant vectors based on tobacco mosaic virus (TMV) and other members of the Tobamovirus genus are now used to transfect commercially meaningful quantities of plant biomass cultivated in enclosed greenhouses and multiacre fields.
How does Tobacco mosaic virus reproduce?
The most important way that TMV can be spread from plant to plant is on workers’ hands, clothing or on tools. This is called ‘mechanical’ transmission. When plants are handled, the tiny leaf hairs and some of the outer cells inevitably are damaged slightly and leak sap onto tools, hands, and clothing.
How can we prevent the Tobacco mosaic virus from spreading?
Controlling the spread of tobacco mosaic virus wash their hands after handling infected plants. wash tools that have come into contact with infected plants in detergent or bleach. rotate the crops they grow in a contaminated field – they must not grow tobacco or tomato plants in the field for at least two years.
What is the function of tobacco mosaic virus?
Tobacco mosaic virus causes a mottled browning of tobacco leaves, and accordingly is of major economic importance. It also infects other crops, most notably tomatoes. The virus is spread mechanically from infected plants to scratched or damaged leaves of normal plants.
What can we do about tobacco mosaic virus?
HOW TO TREAT TOBACCO MOSAIC VIRUS. There is no cure for Tobacco Mosaic Virus, diseased plants should be dug up, roots and all, then burnt. Prevention is the only measure you can take with this disease.
How can we prevent the tobacco mosaic virus from spreading?
How is the tobacco mosaic virus transmitted?
What is the relationship between a virus and its host cell?
A virus attaches to a specific receptor site on the host cell membrane through attachment proteins in the capsid or via glycoproteins embedded in the viral envelope. The specificity of this interaction determines the host—and the cells within the host—that can be infected by a particular virus.
How do plant viruses replicate?
Many plant viruses replicate in association with the cortical ER-actin network that is continuous between cells through plasmodesmata. The replication complexes can be highly organized and supported by network interactions between the viral genome and the virus-encoded proteins.
How does tobacco mosaic virus enter plant cells?
Tobacco mosaic virus enters plant cells only through mechanical wounds which either transiently open the plasma membrane or allow pinocytosis ( Palukaitis and Zaitlin, 1986; Shaw, 1999; Figure 1 ).
How is the replication of TMV carried out?
The replication of tobacco mosaic virus (TMV) RNA involves synthesis of a negative-strand RNA using the genomic positive-strand RNA as a template, followed by the synthesis of positive-strand RNA on the negative-strand RNA templates.
What kind of virus can you get from smoking cannabis?
Also believed to affect cannabis plats are the tobacco streak virus (TSV), the tobacco ringspot virus (TRSV), the alfalfa mosaic virus (AMV) and the cucumber mosaic virus (CMV), which spread aided by viral vectors like seeds and aphids.
What are the four proteins in tobacco mosaic virus?
Therefore an understanding of virus infection processes also offers insight into normal host physiological processes. Tobacco mosaic virus (TMV) encodes four known functional proteins: the 126 and 183 kDa replication-associated proteins, the movement protein (MP), and the structural capsid or coat protein (CP).
https://www.youtube.com/watch?v=vucl3E69_Mk