WIM VAN EGMOND / SCIENCE PHOTO LIBRARY WIM VAN EGMOND / SCIENCE PHOTO LIBRARY
Ectomycorrhiza fungi. The fungal mycelium (white) has completely enveloped the roots of a pine tree. A mycorrhiza is a symbiotic association between a soil fungi and the roots of a plant. Both organisms benefit from this association. Ectomycorrhiza remain on the outside of the root, and do not penetrate its tissues. Magnification: x20 when printed 10 centimetres high.
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