Powdery mildew on a plant, SEM

Powdery mildew on a plant, SEM

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Credit: EYE OF SCIENCE/SCIENCE PHOTO LIBRARY

Caption: Powdery mildew on a plant, coloured scanning electron micrograph (SEM). This is a fungus in the family Erysiphaceae, members of which are parasites of plants. When a spore lands on a plant it germinates and covers the surface in a network of thin thread-like hyphae (grey), called the mycelium. The mycelium absorbs nutrients from the plant's epithelial (surface) tissues, and produces erect conidiophores (the club-like structures here), which bear the fungal spores. The conidiophores cover the surface of the plant host, giving it the soft, powdery appearance responsible for the parasite's name. Magnification: x580 when printed 10cm wide.

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Keywords: biological, biology, coloured, condition, conidia, conidiophore, conidiophores, conidium, disease, disorder, erysiphaceae, erysiphales, eumycota, extracellular, false-coloured, fungal, fungi, fungus, hypha, hyphae, microbiological, microbiology, mildew, mycelium, mycology, nature, obligate, parasite, parasitic, pathological, pathology, plant, powdery mildew, reproduction, reproductive, scanning electron micrograph, scanning electron microscope, sem, surface

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