HORTICULTURE

Detailed explanation-1: -Tobacco mosaic virus is a disease which affects plants. It causes discolouring of leaves, reducing the amount of pigment in the leaves which means the plant cannot photosynthesise as efficiently. The plant does not produce as much glucose so will display stunted growth.

Detailed explanation-2: -TMV affects plant photosynthesis. Tobacco mosaic virus (TMV) is a plant pathogen that affects tobacco and other tobacco like plants, such as cucumbers. It works by infecting chloroplasts, which changes the colour of the plant from green to yellow. This stops the plant from photosynthesising properly.

Detailed explanation-3: -Stunted growth and reduced yield are common symptoms, especially when several viruses are present. Mosaic patterns of lighter green on the leaves (TMV, ToMV, CMV, PepMV)

Detailed explanation-4: -This causes leaf discoloration. Explain why plants with TMV have stunted growth. Chlorophyll gives plants coloration so a discolored plant would have a lack of chlorophyll. This means that less photosynthesis would occur in the leaves of the plant, so less glucose is made as a result.