Powdery scab infection, light micrograph

Powdery scab infection, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Powdery scab infection. Light micrograph of a section through a potato infected with powdery scab (Spongospora subterranea), showing pustules and spores. S. subterranea is a cercozoan protist that infects and destroys tubers. It causes raised brown pustules (red) on the tuber skin, which breaks and curls back over the pustule to form a brown powdery mass of spore balls (brown). Here, the lesions have formed a cork layer under the epidermis (skin, blue). Magnification: x7 when printed 10 centimetres wide.

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Keywords: abnormal, biological, biology, botanical, botany, cell, cells, cercozoa, cercozoan, cork, disease, diseased, epidermis, histological, histology, infected, infection, layer, layers, lesion, lesions, light micrograph, light microscope, micro-organism, micro-organisms, microbiological, microbiology, microorganism, microorganisms, parasite, parasitic, parasitism, parasitology, plant, plants, potato, powdery scab, protist, pustule, pustules, reproductive structure, skin, spongospora subterranea, spore, spore ball, spore balls, spores, structures, tuber, unhealthy, white background

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