Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A spore that gives rise to a female gametophyte and is larger than a microspore.
from The Century Dictionary.
- noun Same as
macrospore .
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun The larger spore of a
heterosporous plant, typically producing a femalegametophyte
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun larger of the two types of spore produced in heterosporous plants; develops in ovule into a female gametophyte
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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This one haploid cell, the megaspore, then undergoes three successive mitoses to form the embryo sac, or the female gametopyhte.
Nobel Lecture The Significance of Responses of the Genome to Challenge 1983
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The behaviour of the chromosomes in meiosis or reduction division both in the pollen mother-cells and in the megaspore mother-cells which give rise to the so-called embryo-sac are fully described by Gates.
Hormones and Heredity J. T. Cunningham 1897
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Female cone develops two ovules on the upper surface of each cone scale; each ovule contains haploid megaspore.
WN.com - Articles related to TV food advertisements promote imbalanced diets 2010
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Female cone develops two ovules on the upper surface of each cone scale; each ovule contains haploid megaspore.
WN.com - Articles related to TV food advertisements promote imbalanced diets 2010
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In the ovules of most sexual flowering plants female gametogenesis is initiated from a single surviving gametic cell, the functional megaspore, formed after meiosis of the somatically derived megaspore mother cell (MMC) 1, 2.
Naturejobs - All Jobs Vianey Olmedo-Monfil 2010
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