Defence Against Pathogens

Description

- Plant defences against Pathogens - Primary non-specific defences
Dean Lundie
Mind Map by Dean Lundie, updated more than 1 year ago
Dean Lundie
Created by Dean Lundie over 8 years ago
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Resource summary

Defence Against Pathogens
  1. Animals
    1. Skin
      1. Physical barrier that blocks pathogens
        1. Contains antimicrobial chemicals
        2. Mucous Membranes
          1. Protect body openings
            1. Secrete mucous which traps and kills pathogens
            2. Blood Clotting
              1. Mesh of protein fibres
                1. Prevent pathogen entry and blood loss
                2. Inflammation
                  1. Tissue damage increases permeability of blood vessels
                    1. Leaks fluid into surrounding area and isolates the pathogens
                      1. Swelling
                      2. Vasodilation increases blood flow
                        1. More White blood cells
                      3. Wound Repair
                        1. Outer layers of skin divide and move to edge of wound
                          1. This tissue underneath contracts to connect the edges with collagen fibres
                        2. Expulsive Reflexes
                          1. Automatic response to expel foreign objects, including pathogens
                            1. Coughing and Sneezing
                          2. Plants
                            1. Physical
                              1. Waxy Cuticle
                                1. Cell walls
                                  1. Callose Deposition
                                    1. Sieve plate in the phloem are blocked by a polysaccharide called callose. This prevents pathogens from moving through the phloem
                                  2. Chemical
                                    1. Produce antimicrobial chemicals
                                      1. Saponins
                                      2. Chemicals that are toxic to insects
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