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Hollyhock rust fungus in a leaf

Hollyhock rust fungus in a leaf

C011/6342

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Credit

DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY

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) pierce the cells with haustoria and suck out nutrients. The telia have stalks containing two-celled teliospores, and project through the ruptured epidermis (blue). Magnification: x37 when printed 10 centimetres wide.

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