prothallus

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prothallus

a small thalloid structure produced by the germination of the spore in ferns and related plants, which bears the ARCHEGONIA and ANTHERIDIA and is the GAMETOPHYTE generation.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
We also found similar fungal structures than the ones found in Gleichenia bifida (Willd.) Spreng by Schmid and Oberwinkler (1995): the endophytic fungal hyphae were aseptate and spread inter- and intra-cellularly, they penetrated the host tissue through the rhizoids, developed vesicles in both the rhizoidal and the prothallic cells.
Within the gametophyte chlorophillic cells, intracellular fungal hyphae were reported; the hyphae branched covering most of the prothallic cells and, in some cases, the hyphae managed to trespass the cell wall, establishing inter-cellular hyphae; however, no arbuscles were registered.