DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Sago palm root. Micrograph of a cross-section of the root of the sago palm (Cycas revoluta) showing the diarch xylem and the presence of fungal endotropic mycorrhiza in the cells. The mycelium of the fungus helps the plant to absorb water and minerals in exchange for sugars from the plant.
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