Infection & ResponseDiagram

Case Study 2: Tobacco Mosaic Virus (TMV)

Part of Plant Diseases and Defenses — GCSE Biology

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 17 in this topic. Focus on the labels, the relationships between parts, and the explanation that turns the diagram into an exam-ready answer.

Topic position

Section 5 of 17

Practice

18 questions

Recall

20 flashcards

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

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Poor Photosynthesis

Less glucose production for energy and growth

→

Stunted Growth

Reduced energy leads to smaller, weaker plants

Keep building this topic

Read this section alongside the surrounding pages in Plant Diseases and Defenses. That gives you the full topic sequence instead of a single isolated revision point.

Case Study 1: Rose Black Spot Mineral Ion Deficiencies The Silent Battle in Your Garden Key Facts: Plant Diseases

Practice Questions for Plant Diseases and Defenses

What type of pathogen causes rose black spot disease?

A. Fungus
B. Virus
C. Bacterium
D. Protist

1 markfoundation

Explain how rose black spot affects the growth of infected plants.

2 marksstandard

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.

18 questions on Plant Diseases and Defenses — practise free

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Case Study 1: Rose Black Spot

Mineral Ion Deficiencies