Biology (Separate Science) · GCSE · AQA · AQA GCSE Biology - Foundation (8461) · Specification point · 4.3.3.1 · Infection and response · Plant disease (biology only)
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4.3.3.1 Detection and identification of plant diseases
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Plants can be infected by a range of viral, bacterial and fungal pathogens as well as by insects. Knowledge of plant diseases is restricted to tobacco mosaic virus as a viral disease, black spot as a fungal disease and aphids as insects. Plants can be damaged by a range of ion deficiency conditions:
Knowledge of ions is limited to nitrate ions needed for protein synthesis and therefore growth, and magnesium ions needed to make chlorophyll. | WS 1.4 The understanding of ion deficiencies allows horticulturists to provide optimum conditions for plants. |