Fig. 4.

Simplified representation of water transport from soil through an arbuscular mycorrhizal fungus (AMF) hypha to a plant root. Extracytoplasmic water transport in a hypha, represented by a light blue arrow, joins apoplastic transport in a plant root, represented by a yellow arrow. Cytoplasmic transport in a hypha, represented by a dark blue arrow, joins symplastic transport in a plant root, represented by a purple arrow. 1, AMF hypha; 2, root; 3, soil water; 4, soil particles; 5, arbuscule; 6, appressorium; 7, Casparian strip.