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 (ăp′ə-spôr′ē, ə-pŏs′pə-rē)
The development of a gametophyte directly from a sporophyte without the occurrence of meiosis or spore formation.

a·pos′por·ous (ə-pŏs′pər-əs), ap′o·spor′ic (-spôr′ĭk) adj.


1. (Botany) botany development of the gametophyte from the sporophyte without the formation of spores
2. (Botany) the development of an embryo of a flowering plant outside the embryo sac, from a cell of the nucellus or chalaza
[C19: from apo- + spore + -y1]


(ˈæp əˌspɔr i, -ˌspoʊr i, əˈpɒs pə ri)

the development of a gametophyte from a sporophyte without meiosis.
ap`o•spor′ic (-ˈspɔr ɪk, -ˈspɒr-) a•pos′por•ous, adj.
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References in periodicals archive ?
pleostachyum showed aposporic sacs of nucelar origin and some meiotic sacs, suggesting facultative apomixis.
Meiocyte callose in aposporic and diplosporic grasses and in hybrids between bread wheat and Elymus rectisetus.
Aposporic initial cells (Naumova and Willemse, 1995) and functional cells of meiotic dyads in bisporic species (Battaglia, 1989) undergo rapid vacuolization, and embryo sac development from such cells is precocious (Savidan, 1982; Nogler, 1984; Battaglia, 1989; Lutts et al.