Plant root with ectomycorrhiza, light micrograph
Light micrograph of a washed spruce root with ectomycorrhiza. A mycorrhiza is a symbiotic association between a soil fungus and the roots of a plant. Both organisms benefit from this association. Ectomycorrhiza grow between the cells of the root cortex, but do not penetrate its tissues. Magnification: x20 when printed at 15cm wide., by EYE OF SCIENCE/SCIENCE PHOTO LIBRARY
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