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The unisexual female sex organ in oogamous algae and fungi.
A descendant of a primary germ cell which develops into an oocyte.



the female sex organ (gametangium) of many lower plants that are characterized by oogamy. A single egg cell develops in the oogonium. Several egg cells rarely develop, for example, in Cyclosporeae brown algae. The oogonium is usually unicellular; less frequently, is it multicellular, for example, in Charophyta algae.

References in periodicals archive ?
As for the germinal cells, positive PR existed in the cytoplasm during the early ovary development stages (stages I-III), including oogonium and endogenous vitellogenic oocytes, whereas positive PR stained in the nucleus of oocyte cells during stage III to stage V.
It was also beneficial for regulation environment simulation for oocyte gene expression in vivo and study regulation of c-FLIP(L) on differentiation and proliferation of oogonium at the gene level.
After fertilization of an oogonium, the resulting oospore was retained on the female thallus and underwent a number of cell divisions to produce a multicellular 'fruit'.