prothallus

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Related to prothallial: generative cell, Tube cell

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.
References in periodicals archive ?
ce= spore coat, cp= prothallial cell, cr= rhizoidal cell, gg= oil bodies, r= rhizoid.
The germination of this species is of the Vittaria type (Nayar & Kaur 1968), as the first prothallial cell appears by means of a division that occurs perpendicular to the first rhizoid.
B: first stage of germination, with one rhizoid and a perpendicular first prothallial cell, 11 days.
The prothallial cell underwent periclinal divisions giving rise to 2-6-cell-long uniseriate filaments.
Plate phase formation began between days 20-40 with an orientation change in the division plane of the apical cell, showing a variation in the prothallial development pattern.
Hair abundance varies among species and depends on the stage of prothallial development.
TABLE 1 Comparison of diferentes stages of the prothallial development of Arachniodes denticulata with other genera and species of Dryoteridaceae.