DENDROLOGY

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: -In plants infected by many vascular pathogens, stomata remain partially closed, chlorophyll is reduced and photosynthesis stops, even before the plant eventually wilts.

Detailed explanation-4: -From the data taken, and through analysis, we calculated that TMV infection reduced chlorophyll contents by expectations stem diameter increased 2.12% compared to control plants in ‘Kumsal’.