This diagram covers Case Study 2: Tobacco Mosaic Virus (TMV) within Plant Diseases and Defenses for GCSE Biology. Plant pathogens, defense mechanisms, disease identification, crop protection It is section 5 of 18 in this topic. Focus on the labels, the relationships between parts, and the explanation that turns the diagram into an exam-ready answer.
Case Study 2: Tobacco Mosaic Virus (TMV)
TMV Effects on Plant Growth
Cellular Damage
Virus disrupts cell function and chloroplast structure
Reduced Chlorophyll
Light and dark patches show chlorophyll loss
Poor Photosynthesis
Less glucose production for energy and growth
Stunted Growth
Reduced energy leads to smaller, weaker plants
Practice questions for Plant Diseases and Defenses
What type of pathogen causes rose black spot disease?
Explain how rose black spot affects the growth of infected plants.
Quick recall flashcards
What is rose black spot?
A fungal disease that affects roses, causing black or purple spots on leaves, which turn yellow and drop off, reducing photosynthesis.
What is a plant pathogen?
A microorganism that causes disease in plants, such as fungi, bacteria, or viruses.