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This presentation flows best if it's read from top to bottom!

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This presentation flows best if it's read from top to bottom!

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A photograph of Dmitri Ivanovsky, the discoverer of the Tobacco Mosaic Virus.
Image Citation:
“Dmitri Ivanovsky.” Wikipedia, Wikimedia Foundation, 16 June 2020, en.wikipedia.org/wiki/Dmitri_Ivanovsky.

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The tobacco mosaic virus is a helical virus that was first discovered in 1892 by Dmitri Ivanovsky when he reported that after the sap from a infected tobacco plant was passed through a bacteria-retaining Chamberland filter, the filtrate remained infectious and infected healthy tobacco plants. The symptoms of the virus include

stunting

mosaic pattern of light and dark green (or yellow and green) on the leaves

malformation of leaves

yellow streaking of leaves

yellow spotting on leaves

distinct yellowing only of veins

This occurs to do the fact that the virus prevents the plant from photosynthesising properly. The virus is specific to plants as other species's cell receptors do not recognize the virus.

Image Citation: Ryan, Kate. “Tobacco Mosaic Virus: Snohomish County: Washington State University.” Snohomish County, 27 May 2020, extension.wsu.edu/snohomish/tobacco-mosaic/.

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What category of virus is the tobacco mosaic virus? 

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What category of virus is the tobacco mosaic virus? 

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It is categorized as a rod shaped (helical) virus.
Image citation:
“Tobacco Mosaic Virus.” Encyclopædia Britannica, Encyclopædia Britannica, Inc., 1996, www.britannica.com/science/tobacco-mosaic-virus.

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Why the tobacco mosaic virus is considered helical + some more info about helical viruses. 

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Why the tobacco mosaic virus is considered helical + some more info about helical viruses. 

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My virus belongs to the helical category as possesses the structure needed for a virus to be considered helical. This structure can be described as a capsid shaped in a rod-shaped structure that has a main cavity that contains its nucleic acid

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How does this virus affect plants (life expectancy + treatment)

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How does this virus affect plants (life expectancy + treatment)

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There is currently no chemical treatment for the virus although, if your crop as been infected, it is recommended for the planter to dig out all of the plant and the surrounding soil, along with possibly infected plants, after they have been dug burn the entire plant. This will get rid of a majority of the spread. I was unable to find information about the life expectancy of the plant once it has been infected however, the virus itself can last for up to 2 years after its infected the plant, this combined with there being no cure that doesn't involve the plant being burned leads me to believe that the life expectancy is close to 0%.

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Fun Facts about the tobacco mosaic virus!

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Fun Facts about the tobacco mosaic virus!

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1. The tobacco mosaic virus was the first virus to be discovered
2.A single tobacco mosaic virus particle is composed of around 2,130 copies of the coat protein
3. There are multiple tomato varieties that are resistant to the virus including the Sungold, Geronimo, and the BHN-871

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My experience with the tobacco mosaic virus

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My experience with the tobacco mosaic virus

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While I do not know anyone who has had or has been affected by the virus, as someone who loves to garden knowing that there's a virus that affects such a wide variety of crops including cucumber, lettuce, beet, jimson weed, peppers, tomatoes, petunia's and horsenettle, I will now be on the lookout for the virus and will try my hardest to keep my garden safe

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1. Ryan, Kate. “Tobacco Mosaic Virus: Snohomish County: Washington State University.” Snohomish County, 27 May 2020, extension.wsu.edu/snohomish/tobacco-mosaic/.

2. “Tobacco Mosaic Virus.” Encyclopædia Britannica, Encyclopædia Britannica, Inc., 1996, www.britannica.com/science/tobacco-mosaic-virus.

3. Johnson, Anna, et al. “Tomato Mosaic Virus and Tobacco Mosaic Virus.” UMN Extension, 2015, extension.umn.edu/diseases/tomato-mosaic-virus-and-tobacco-mosaic-virus.

4. Moorman, Gary W. “Tobacco Mosaic Virus (TMV).” Penn State Extension, 1 Aug. 2020, extension.psu.edu/tobacco-mosaic-virus-tmv.

5. “Tobacco Mosaic Virus Facts for Kids.” Tobacco Mosaic Virus Facts for Kids, 2020, kids.kiddle.co/Tobacco_mosaic_virus.

6. Rifkind, David. “Tobacco Mosaic Virus.” Tobacco Mosaic Virus - an Overview | ScienceDirect Topics, 2016, www.sciencedirect.com/topics/medicine-and-dentistry/tobacco-mosaic-virus.

7. “Shapes of a Virus: Helical, Icosahedral, Prolate, Complex & Enveloped.” Study.com, study.com/academy/lesson/shapes-of-a-virus-helical-icosahedral-prolate-complex-enveloped.html.