Arum-type refers to the morphology of fungal hyphae living in, or around plant root cells.

• Forms in arbuscular or tree-like fashion, branching off dichotomously at predetermined junctions.

This is a type of mycorrhizal infection whereby the fungus in question invaginates the cell membrane of a plant cell, and branches in arbuscular manner. Arum-type growth of hyphae is used in endomycorrhizal symbiosis with a plant.

• Often, but not always, accompanied by intercellular hyphal growth.

• Arbuscular mycorrhizal fungi
• Paris type

• C.J. Alexopolous, Charles W. Mims, M. Blackwell et al., Introductory Mycology, 4th ed. (John Wiley and Sons, Hoboken NJ, 2004) ISBN 0-471-52229-5

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