plant disease and defence

• give sources of plant disease

  microorganisms, large organisms or deficiencies
• give types of plant deficiencies

  nitrate and magnesium
• describe affect of nitrate deficiency

  1. lack of protein production
  2. stunted growth
• describe affect of magnesium deficiency

  1. lack of chlorophyll production
  2. yellow leaves
  3. less photosynthesis
  4. less glucose produced
  5. stunted growth
• give symptoms of plant disease

  stunted growth, yellow leaves, abnormal growth, presence of pests, discoloration, area of decay and malformed stems or leaves
• give identification methods of plant diseasegardening manual or website references, send sampkle to
• give identification methods of plant disease

  gardening manual or website reference, send sample to lab for testing and monoclonal antibody testing kits
• give types of plant defence system

  physical, chemical and mechanical
• describe physical plant defences

  prevent entrance of microorganisms
• give examples of physical plant defences

  cellulose cell wall, waxy cuticle and layers of dead cells
• describe chemical plant defences

  secretion of specific chemicals
• give examples of chemical plant defences

  antimicrobial substance and poison
• describe mechanical plant defences

  perform specific function
• give examples of mechanical plant defences

  thorns or hairs, dropping or curling leaves and mimicry