antheridium

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  • noun

Words related to antheridium

the male sex organ of spore-producing plants

References in periodicals archive ?
Gametophytes first produced antheridia during early heart-shaped stages, when they were more than 0.
In most hermaphroditic gametophytes, antheridia were usually produced prior to cushion formation while the archegonia occurred only after the cushion formed.
The study also provided evidence supporting apomictic reproduction in this species by noting the presence of antheridia but the absence of archegonia.
Parametric and KruskalWallis ANOVA were used to test for treatment effects on numbers of antheridia and archegonia per gametophyte after adjusting for thallus size and each of the three morphological metrics; i.
These branches had antheridia and archegonia interspersed along their length and thus were sexually mature.
The antheridia were restricted to the basal part of the gametophyte (between the rhizoids).
Besides the improper time counting the number of juvenile sporophytes and the physical structure of the mixture, a density of spores or gametophytes that was too high may have resulted in lack of nutrition, an unbalanced proportion of antheridia and archegonia or something else (Liu and Liu, 2001), though a higher density of gametophytes contributes to more antheridia and more sporophytes for some species (Raghavan, 1989; Pan et al.
Microscopic observations (stereomicroscope and SEM) made it possible to verify the integrity and the proper development of the prothallia, and the presence of archegonia and antheridia.
Polystichum pycnolepis formed few bisexual gametophytes with scarce antheridia.
Later, some female gametophytes began to produce antheridia and became bisexual.
Spores develop into gametophytes that are either hermaphroditic, containing both archegonia and antheridia, or exclusively male, containing only antheridia (Banks, 1997).
Antheridia developed on separate gametophytic prothalli, which were elongated and much longer than archegonial prothalli.
According to the Dopp-Manton Scheme and Braithwaite modes of reproduction (Raghavan, 1989), Acrorumohra diffracta might be an obligate apogamous species with functional antheridia.