6. Plant disease

Available for over a year

Dr Alex Lathbridge guides you through the most important GCSE Biology facts, with a few jokes thrown in too. In this sixth episode of our series all about infection and response, Dr Alex Lathbridge breaks down the key facts about plant disease and the physical and chemical defences that protect plants against pathogens. Dr Alex looks at pathogens such as the tobacco mosaic virus and the fungus rose black spot. Physical defences of plants include bark, a cellulose cell wall and the waxy cuticles of leaves, whereas chemical defences of plants are antibacterial chemicals and poisons. Take a look on the BBC Bitesize website to find out more about this topic, with revision notes, quizzes and exam-style questions: https://www.bbc.co.uk/bitesize/guides/z3tgw6f/revision/1 Suitable for: Combined science AQA Synergy AQA Trilogy Edexcel Eduqas OCR Gateway Single science AQA Edexcel OCR 21st Century OCR Gateway