Tobacco Mosaic Virus (TMV) Flashcards

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What type of pathogen causes Tobacco Mosaic Virus (TMV), and what does it infect?

TMV is a virus that infects plants, such as tobacco, tomato and other crop plants.

What is the main visible symptom of a plant infected with TMV?

The leaves show a mosaic pattern of light and dark patches or streaks, often with yellow or pale areas.

How does TMV infection affect the growth of a plant?

TMV slows down growth, so the plant becomes stunted and may produce fewer or smaller leaves and fruits.

Why does TMV reduce the rate of photosynthesis in a plant?

TMV damages the leaves so they lose some of their green colour, meaning there is less chlorophyll for photosynthesis.

Is Tobacco Mosaic Virus a communicable or a non-communicable disease, and why?

TMV is a communicable disease because it can spread from one infected plant to other plants.

How can TMV spread from plant to plant?

TMV can spread by direct contact between plants, by contaminated tools and hands, and sometimes by insects.

Name two ways farmers can reduce the spread of TMV in their fields or greenhouses.

They can remove and burn infected plants and disinfect tools and hands. They can also grow TMV-resistant plant varieties.

Can TMV be cured once a plant is infected?

No, there is no cure for TMV, so infected plants usually stay infected for life.

Why can TMV cause economic problems for farmers?

TMV reduces crop yield and quality, so farmers may get less produce to sell and lose money.

Does Tobacco Mosaic Virus infect humans or animals?

No, TMV only infects plants and does not infect humans or other animals.