Hollyhock rust fungus in a leaf

Hollyhock rust fungus in a leaf

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Caption: Hollyhock rust fungus in a leaf. Light micrograph of a section through a hollyhock (Alcea sp.) leaf infected with the parasitic Puccinia malvacearum rust, showing the teliospores (spores, brown-red). The fungal hyphae (tubes, not seen) pierce the cells with haustoria and suck out nutrients. The telia have stalks containing two-celled teliospores, and project through the ruptured epidermis (not seen). Magnification: x138 when printed 10 centimetres wide.

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Keywords: abnormal, alcea sp., biological, biology, botanical, botany, cell, cells, disease, diseased, fungal, fungi, fungus, histological, histology, hollyhock rust fungus, infected, infection, leaf, light micrograph, light microscope, micro-organism, micro-organisms, microbiological, microbiology, microorganism, microorganisms, parasite, parasitic, parasitism, parasitology, plant, plants, puccinia malvacearum, reproductive structure, spore, spores, stalk, stalks, structures, telia, teliospore, teliospores, telium, unhealthy, white background

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