asymbiosis
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Arbuscular mycorrhiza — An arbuscular mycorrhiza (plural mycorrhizae or mycorrhizas) is a type of mycorrhiza in which the fungus penetrates the cortical cells of the roots of a vascular plant.Arbuscular mycorrhizae (AMs) are characterized by the formation of unique… … Wikipedia
presymbiosis — noun The stage in the development of an organism during which the necessary biochemical changes are made to allow a move from asymbiosis to symbiosis … Wiktionary
