AQA GCSE Biology

Revision Notes

3.1.4 Fungal Diseases

Fungi: Basics

  • Few fungal diseases that affect humans, one example is athletes’ foot. This is spread by contact with surfaces that have been touched by an infected person, such as shower room floors
  • Often the fungus is unicellular, as in the case of yeast, but can have a body made up of thread-like structures called hyphae
    • The hyphae can grow and penetrate the surface of plants and animals causing infections
    • The hyphae can produce spores, which can spread the infection to other organisms
  • Fungal infections are more common in plants and can destroy a crop or plant

Rose Black Spot

  • Rose black spot is a fungal disease of plants where purple or black spots develop on leaves, which often turn yellow and drop early
  • It affects the growth of the plant as photosynthesis is reduced
  • It is spread in the environment by water or wind
  • Rose black spot can be treated by using fungicides and/or removing and destroying the affected leaves

Rose black spot table

Rose black spot table, downloadable IGCSE & GCSE Biology revision notes

Exam Tip

Know the symptoms and how the pathogen causing each disease is spread. Typically, this topic appears as data analysis questions in the exam where you may be given a graph to analyse and interpret.

Author: Jenna

Jenna studied at Cardiff University before training to become a science teacher at the University of Bath specialising in Biology (although she loves teaching all three sciences at GCSE level!). Teaching is her passion, and with 10 years experience teaching across a wide range of specifications – from GCSE and A Level Biology in the UK to IGCSE and IB Biology internationally – she knows what is required to pass those Biology exams.
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