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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 ?
Oogonia are cells characterized by one basophilic nucleolus; dispersed chromatin, extremely narrow and weakly basophilic cytoplasm (Fig.
Maturity Main Main macroscopic features of each phases histological phase features of each phase Immature Oogonia, PG Ovaries small, translucent, gray, white, milky, or pink, occupy less than 1/5 of the body cavity.
While the sagittal section of a normal ovary showed the different stages of oogenesis from oogonia until mature oocytes (Fig.
The primordial germ cells give rise to nests of primary and secondary oogonia through a series of mitotic divisions.
The morphologic features of their hyphal and other structures developed in these media, including oogonia, were microscopically investigated.
RSPO1/beta-catenin signaling pathway regulates oogonia differentiation and entry into meiosis in the mouse fetal ovary.
The first are oogonia (female) and antheridia (male), developing mostly at branchlet nodes.
Previous studies reported that the lacunae are related to elimination of dead oogonia [65-67], whereas the fatladen cells are associated with a steroid production [65].
Based on morphological characterization, the foot rot pathogen exhibited globose oogonia with paragynous antheridia, chlamydospore, torulose hyphae and lemon shaped sporangia with long pedicel.
Identification was based on colony morphology, mycelial characteristics, cardinal growth temperatures, morphology and dimensions of sporangia, oogonia and antheridia as follows; Colony morphology and growth temperature: A 5-mm-diameter mycelial plug of each isolate was transferred to ACMA and incubated at 5, 24 and 35 [degrees]C for 7 days in the dark.