Thursday 4th September
TODAY WE ARE
LEARNING ABOUT
 How do plants defend themselves from pathogens?
TODAY'S
KEY WORDS ARE
  • St_nt_d  gr_wth
  • d_c_y
  • m_lf_rm_d
  • D_sc_l_r_t__n
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    • Super Challenge:

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      Challenge:

    Key Questions:

    1. (Bio only) What can cause plant infections?
      • Plants can be infected by a range of viral, bacterial and fungal pathogens as well as by insects.
    2. (Bio only) What causes deficiency conditions in plants?
      • Deficiency conditions in plants can be caused by a lack of ions
    3. (Bio only) What ion can cause stunted growth and why?
      • Stunted growth is caused by nitrate deficiency, this is caused by reduced protein synthesis.
    4. (Bio only) What ion can cause chlorosis (pale green leaves)?
      • Chlorosis is caused by magnesium deficiency
    5. (Bio only) What are the chemical and physical plant defence responses.
      • Physical-Thorns Chemical-Toxins produced example stinging nettle.Some plants are poisionous.
    6. (Bio only) What are the physical defences that plants have to resist invasion of microorganisms?
      • The physical defence responses to resist invasion of microorganisms include: ? Cellulose Cell walls. ? Tough waxy cuticle on leaves. ? Layers of dead Cells around stems (bark on trees) which fall off.
    7. (Bio only) What are the chemical defences that plants have to resist invasion of microorganisms?
      • The chemical plant defence responses to resist invasion of microorganisms include: - Antibacterial chemicals. - Poisons to deter herbivores.
    8. (Bio only) What are the different ways that plant diseases can be detected?
      • (HT) Plant diseases can be detected by: - stunted growth - spots on leaves - areas of decay (rot) - growths - malformed stems or leaves - discolouration - the presence of pests.
    9. (Bio only) How can plant diseases be identified? (give three ways)
      • (HT) Plant diseases can be identified by: - reference to a gardening manual or website - taking infected plants to a laboratory to identify the pathogen - using testing kits that contain monoclonal antibodies.
    10. (Bio only) What are the mechanical adaptations that plants have to resist invasion of microoganisms?
      • The mechnical adaptations that plants have to resist invasion of microorganisms are: - Thorns and hairs deter animals. - Leaves which droop or curl when touched. - Mimicry to trick animals.