Why do plants with tobacco mosaic virus have stunted growth?
It infects the chloroplasts of plant leaves and changes their colour from green to yellow or white in a mosaic pattern. It can also make leaves crinkled or curled up. This reduces the plant’s ability to photosynthesise and grow properly, which can reduce farmers’ crop yields .
How does tobacco mosaic virus affect plant growth?
TMV infects the chloroplasts of plant leaves and reduces the plant’s ability to photosynthesise . The leaves change colour from green to yellow or white and develop a mosaic pattern. It can also make leaves crinkled or curled up.
How could TMV affect the growth of a plant?
(d) TMV can cause plants to produce less chlorophyll. This causes leaf discoloration.
What is unique about tobacco mosaic virus?
TMV was the first virus to be discovered. Although it was known from the late 19th century that a non-bacterial infectious disease was damaging tobacco crops, it was not until 1930 that the infectious agent was determined to be a virus. It is the first pathogen identified as a virus.
What are the symptoms of tobacco mosaic virus?
Symptoms associated with TMV infections:
- mosaic pattern of light and dark green (or yellow and green) on the leaves.
- malformation of leaves or growing points.
- yellow streaking of leaves (especially monocots)
- yellow spotting on leaves.
- distinct yellowing only of veins.
How can we prevent tobacco mosaic virus?
To control the spread of TMV, farmers must: 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 plants are affected by tobacco mosaic virus?
The tobacco mosaic virus attacks plants in the families that include tomato, pepper, eggplant, tobacco, spinach, petunia, and marigold. Many modern vegetable varieties have been developed to resist this virus.
What does mosaic virus do?
THE 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.
Does mosaic virus stay in soil?
The virus often appears following cool conditions that favor aphid flights. Unlike TMV (tobacco mosaic virus), CMV is not seedborne in tomato and does not persist in plant debris in the soil or on workers’ hands or clothing.
Can a tobacco mosaic virus infect a human?
Tobacco mosaic virus (TMV), a widespread plant pathogen, is found in tobacco (including cigarettes and smokeless tobacco) as well as in many other plants. Plant viruses do not replicate or cause infection in humans or other mammals.
Who first crystallized virus?
We will look at Wendell Meredith Stanley, who reported the first virus in crystalline form on June 28, 1935.