megasporogenesis


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Related to megasporogenesis: microsporogenesis

megasporogenesis

[‚meg·ə‚spȯr·ə′jen·ə·səs]
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
In the ovules, megasporogenesis and then megagametogenesis occur.
In the present study, megasporogenesis marks the initiation (onset or birth) of female gametophyte development ([Alpha]), and fertilization serves to denote the offset point at which sexual maturity is reached ([Beta]).
Thus the developmental process of megasporogenesis and female gametophytes plays a prominent role in contributing to population maintenance and regeneration of important species (Qu et al.
Sporogenesis usually excludes discussion of megasporogenesis in the seed plants where resultant megaspores remain enclosed within surrounding tissues of the megasporangium (ovule) and, at least in angiosperms, lack an elaborate sporoderm.
Microsporogenesis in the Cyperaceae mirrors megasporogenesis in most angiosperms: three nuclei of each pollen mother cell (PMC) degenerate after failing to undergo DNA replication (Juel, 1900; Hoshino & Shimizu, 1986; Brown & Lemmon, 2000).
Megasporogenesis, embryo sac development and embryogenesis in dallisgrass, Paspalum dilatatum Poir.
In sexual plants, most unreduced gametes result from the failure of chromosome reduction at the first meiotic division or the failure of cytokinesis at the second meiotic division during megasporogenesis and/ or microsporogenesis.
Megasporangium, megasporogenesis and megagametogenesis.
It is reasonable to assume that this phenomenon also occurred during megasporogenesis and produced unreduced female gametes.
The use of a new clearing technique for the study of early ovule development, megasporogenesis, and megagametogenesis in five species of Cornus L.