HORTICULTURE SCIENCE
PLANT DISEASES PATHOGENS THEIR SURVIVAL AND SPREAD
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How does TMV damage a plant?
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They reduce the area for photosynthesis.
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They destroy cells.
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They act as a vector, transferring viruses, bacteria and fungi between the plants.
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They prevent plants from acquiring the water and minerals it needs.
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Explanation:
Detailed explanation-1: -Tobacco mosaic virus (TMV) induces the hypersensitive response (HR) in tobacco plants containing the N gene. This defence response is characterized by cell death at the site of virus infection and inhibition of viral replication and movement.
Detailed explanation-2: -ost plant viruses are transmitted by insect vectors that cause damage to the plant and create an entry point for pathogens, or that tap into the phloem to feed. Once inside, viruses use the handful of genes in their tiny genomes to orchestrate the plant cells’ machinery, while evading the plant’s defenses.
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