Mycorrhiza er symbiosen mellem en svamp og en plante. Svampene lever i plantens rodsystem. Normalt har både svampen og planten fordel af symbiosen.

Svampen hjælper planten med at absorbere vand og næringsstoffer fra jorden.

Planten “til gengæld” hjælper svampen med at få energi fra solen.

A og B viser planter med mycorrhiza omkring deres rødder, mens C og D viser plantens art på samme sted, men mangler mycorrhiza. Bemærk den mere grønne og rigelige plantevækst i A i forhold til C. Foto: Klara Hönig & Ingrid Kottke, CC BY-SA 4.0 (, via Wikimedia Commons).


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