Tobacco mosaic virus (TMV) affects the growth of tomato plants. Which of the following best explains why infected plants show stunted growth?

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Question

Tobacco mosaic virus (TMV) affects the growth of tomato plants. Which of the following best explains why infected plants show stunted growth?

Accepted Answer

Discolouration of leaves reduces photosynthesis, limiting glucose for growth — TMV causes a mosaic pattern of discolouration on leaves, reducing the amount of chlorophyll and therefore the rate of photosynthesis. Less glucose is produced, limiting the energy and organic molecules available for growth and cell division.

Answer

The virus blocks water uptake through the xylem

Answer

The virus destroys the plant's root system

Answer

Discolouration of leaves reduces photosynthesis, limiting glucose for growth

Answer

Infected plants produce more ethylene, inhibiting cell division

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