50.7 MB (4.3 MB compressed)
3479 x 5090 pixels
29.5 x 43.2 cm ⏐ 11.6 x 17.0 in (300dpi)
MICROFIELD SCIENTIFIC LTD / SCIENCE PHOTO LIBRARY MICROFIELD SCIENTIFIC LTD / SCIENCE PHOTO LIBRARY
Rust fungus on a rose leaf. Coloured scanning electron micrograph (SEM) of rust fungus (Phragmidium sp.) spores emerging from a rose (Rosa sp.) leaf (brown). Spores are the reproductive cells of a fungus. Two types of spore are seen, the over-wintering teleutospores (yellow) and the summer uredospores (pink). Rust fungi are parasitic on both wild and cultivated plants, often causing severe disease. Magnification: x440 when printed at 10 centimetres tall.
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