AQA · Biology · 8461
GCSE Biology: Detection and identification of plant diseases
Infection and response · AQA GCSE Biology (8461), specification point 4.3.3.1. Cards are generated from the exam board's own specification for "Detection and identification of plant diseases", and every card links back to the page it came from. Separate science only. Specification © AQA — used with attribution.
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Name three visible signs that a plant may be diseased.
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Any three of: stunted growth, spots on leaves, areas of decay (rot), growths, malformed stems or leaves, discolouration, presence of pests.
What do plant disease testing kits contain to identify a pathogen?
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Monoclonal antibodies.
Give three ways a plant disease can be identified.
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Reference to a gardening manual or website; taking infected plants to a laboratory to identify the pathogen; using testing kits containing monoclonal antibodies.
Which pathogen type causes tobacco mosaic virus disease in plants?
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A virus.
Rose black spot is a plant disease caused by a ? pathogen.
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fungal
What type of organism are aphids?
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Insects that damage plants as pests.
Which ion deficiency causes stunted growth in plants?
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Nitrate deficiency — nitrate ions are needed for protein synthesis and therefore growth.
Which ion deficiency causes chlorosis in plants?
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Magnesium deficiency — magnesium ions are needed to make chlorophyll.
Plants need nitrate ions for ? synthesis and therefore growth.
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protein
Plants need magnesium ions to make ?.
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chlorophyll
What is chlorosis in plants?
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Yellowing of leaves due to lack of chlorophyll, caused by magnesium deficiency.
Name the three types of pathogen that can infect plants.
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Viruses, bacteria and fungi (plants can also be damaged by insects).
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