Plant Defences

• Nitrates are proteins needed in plants for growth and repair. Lack of it causes stunned growth.
• Magnesium ions are needed to make chlorophyll. Lack of it can cause yellow leaves.
• Plants have Physical, Chemical and Mechanical Defences.
• PLANTS - Physical Defences

  
  

  - Waxy Cuticle - Barrier to prevent pathogens from entering.

  
  

  - Cell walls also a barrier
• PLANTS - Chemical Defences

  
  

  - they produce antibacterial chemicals which kill bacteria

  
  

  - They produce poisons to prevent being eaten.
• PLANTS - Mechical Defences

  
  

  - Some plants have thorns to prevent touching from animals

  
  

  - Some plants pretend look bad to look unattractive.