(39) GCSE Biology Revision "Infectious Diseases in Plants"

Plant Infectious Diseases

Overview

• In addition to humans, plants can also suffer from infectious diseases.

• It is crucial to understand specific details of plant diseases for exams.

Tobacco Mosaic Virus (TMV)

• Description:

  • Widespread viral infection affecting various plant species, notably tomatoes.

• Symptoms:

  • Discoloration of leaves in a mosaic pattern.

  • Reduced photosynthesis due to discoloration, leading to decreased growth of the plant.

Rose Black Spot

• Description:

  • A fungal disease affecting roses.

• Symptoms:

  • Development of purple or black spots on leaves.

  • Leaves often turn yellow and eventually fall off.

  • Similar to TMV, this disease reduces photosynthesis and plant growth.

• Transmission:

  • Spread through water or wind.

• Treatment Options:

  • Application of fungicides to kill fungi.

  • Removal and destruction of infected leaves to prevent spread.

Conclusion

• Understanding TMV and Rose Black Spot is essential for recognizing plant diseases.

• Resources such as revision workbooks can provide additional practice and questions.