Plant defence responses

• Physical plant defences

  • Waxy cuticle on leaves
  • layers of dead cells around stems that can fall off (e.g. tree bark)
  • cellulose cell walls

  a plant’s physical defences help to prevent pathogens from entering its tissues and cells
• Chemical plant defences

  • Antibacterial chemicals
  • poisons to deter herbivores (animals that eat plants)
• Mechanical plant defences

  • Thorns and hairs
  • leaves that curl or droop when touched
  • mimicry