Plant diseases and defences 0.0 / 5 ? BiologyMicrobes and diseaseGCSEAQA Created by: ZayedZakerCreated on: 03-09-16 19:07 If plants don't have enough mineral ions what does this lead to? Deficiency symptoms 1 of 9 Why do plants need nitrates? For growth/making proteins 2 of 9 Why do plants need magnesium ions? For making chlorophyll for photosynthesis 3 of 9 What happens to the plant if they lack magnesium and nitrates? Stunted growth, chlorosis and yellow leaves 4 of 9 How can plant diseases be detected by? Stunted growth, spots on leaves, discolouration, infestation of insects, rotting, abnormal growths and deformed stems/leaves 5 of 9 How can we identify signs of disease in a plant? By using a gardening manual, scientists detecting the pathogen or using testing kits containing monoclonal antibodies 6 of 9 What are the physical barriers of a plant against pathogens and insects? Waxy cuticle, layers of dead cells and cell walls 7 of 9 What are the chemical defences within a plant? Antibacterial chemicals and poisons to deter herbivores and kill bacteria 8 of 9 What are the mechanical defences within a plant? Thorns/hairs to deter animals, leaves drooping/curling when touched and mimicry to trick animals 9 of 9
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