macrosporogenesis

macrosporogenesis

[¦mak·rō¦spȯr·ō′jen·ə·səs]
(botany)
In angiosperms, the formation of macrospores and the production of the embryo sac from one or occasionally several cells of the subepidermal cell layer within the ovule of a closed ovary. Also known as megasporogenesis.
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References in periodicals archive ?
The act of fertilization in orchid ovaries is a delayed process in most species studied because the flower bud opens and its stigma is receptive to pollination before macrosporogenesis is completed.